Vehicles with front and rear disc brakes
Brake system
Dual-circuit brake system with diagonal distribution. ABS Bosch 5.7 or ABS Bosch 8.0 with Electronic Brake Distribution (EBD)/ESP Brake booster operating with manifold vacuum or vacuum pump
Brake master cylinder
Dia. mm
25.4
26.99
Brake booster, vacuum
Dia. in inches
8" and 9" tandem
8" and 9" tandem/Dual Rate
Assist factor
i
5.5
5.5/12
Front brakes
Brake caliper
C 54
FN 3
FN 3
FNR-G 60
FNR-G 60
Brembo
Disc size (inches)
15
15
16
16
17
18
Production relevant no.
Pr.- No.
1LZ
1LB/1LE
1LT/1LF
1LA/1LD
1LJ
1LP
Front brake caliper, piston diameter
mm
54
57
57
60
60
28/32
Front brake disc
mm
280
288
312
320
345
365
Brake disc thickness, internally ventilated;
mm
22
25
25
30
30
34
Brake disc wear limit
mm
20
23
23
28
28
32
Pad thickness, with backing plate and dampening sheet
mm
19.3
20.3
20.3
20.3
20.3
-
Brake discs
NOTE:
Rear brakes
Rear brake caliper
C38
C38
C41
C43
C43
Disc size (inches)
15
16
16
16
18
Production relevant no.
Pr.- No.
1KD
1KP
1KW
1KE
1KY
Rear brake caliper, piston diameter
mm
38
38
41
43
43
Brake disc
mm
245
255
288
300
335
Brake disc thickness
mm
10
12
12
22
22
Brake disc wear limit
mm
8
10
10
20
20
Brake pad, thickness with backing plate
mm
16
16
16
17.5
-
Brake pad wear limit with backing plate
mm
7
7
7
8
-
Brake fluid is hygroscopic, i.e. it has the tendency to absorb water and moisture from the air.
Fig. 1: Brake Fluid Graph
Courtesy of VOLKSWAGEN UNITED STATES, INC.
If water has been absorbed, the boiling point will drop, i.e., during high braking temperatures the brake fluid may develop steam bubbles and cause the brakes to fail.
Over time, brake fluid will darken in color. Dark-colored brake fluid does not specify anything about its quality. The coloring occurs through chemical reactions and can occur after a short time (several weeks), especially in vehicles with ABS.
CAUTION:
Avoid any contact of rubber components of the brake system (boots, seals) with mineral oil, gasoline and cleaning solvents!
Even the smallest amount on a seal or boot can cause the part to change and thereby affect the function of the brake system. The results of an unclean brake system first show themselves months later, causing increased repair costs, especially on vehicles with ABS.
Fig. 2: Sleeve Original Size And Swollen As A Result Of Contact With Mineral Oil
Courtesy of VOLKSWAGEN UNITED STATES, INC.
A = Boot - original size
B = Boot (swollen due to contact with mineral oil)
The above mentioned points require special rules for handling:
Always keep brake fluid containers properly sealed. This is the only way of preventing contamination by oil, dirt, cleaning agents or moisture.
Brake fluid containers should be kept completely separate from oils (including hydraulic fluid) and cleaning agents to prevent any mixture of fluids or even filling of the brake system with an incorrect fluid.
Perform brake test on a single-axle brake dynamometer.
Test speed must not exceed 6 km/h. Otherwise the EDL control can activate the brakes if the rollers start at different speeds.
All brake test equipment approved by Audi meets these requirements.
Test on a single-axle brake dynamometer for all-wheel drive vehicles
The rollers drive the wheels of one axle in opposite directions to avoid transmitting torque to the other axle.
Test speed must not exceed 6 km/h, otherwise the EDL control can activate the brakes if the rollers start at different speeds.
CAUTION:
The Torsen differential will be seriously damaged if test speed exceeds 6 km/h.
All brake test equipment approved by Audi meets these requirements.
Test on a single-axle brake dynamometer
Test speed must not exceed 6 km/h, otherwise the EDL control can activate the brakes if the rollers start at different speeds.
All brake test equipment approved by Audi meets these requirements.
Brake fluid is hygroscopic, i.e. it has the tendency to absorb water and moisture from the atmosphere
Fig. 3: Brake Fluid Graph
Courtesy of VOLKSWAGEN UNITED STATES, INC.
An increase in water content in the brake fluid causes its boiling point to drop. A reduced boiling point can cause vapor bubbles to develop as the fluid heats up under intense braking. In this condition the brake is likely to fail completely.
The color of the brake fluid becomes darker over a period of time. A dark brake fluid color is not an indication of its condition. The change in color is caused by chemical reactions and may occur within a short period (several weeks), particularly in vehicles equipped with ABS.
CAUTION:
Avoid any contact of rubber components of the brake system (sleeves, sealing rings) with mineral oil, gasoline and cleaning solvents!
Even very small amounts of the above substances will transform structure and dimension of a sealing ring or sleeve enough to adversely affect brake function. The effects of a polluted brake system will not be noticed for several months until they have caused damage that requires extensive servicing, especially on vehicles installed with ABS.
Fig. 4: Sleeve Original Size And Swollen As A Result Of Contact With Mineral Oil
Courtesy of VOLKSWAGEN UNITED STATES, INC.
A = Sleeve (original size)
B = Sleeve (swollen due to contact with mineral oil)
The above mentioned points require special rules for handling:
Always keep brake fluid containers properly sealed. This is the only way of preventing contamination by oil, dirt, cleaning agents or moisture.
Brake fluid containers should be kept completely separate from oils (including hydraulic fluid) and cleaning agents to prevent any mixture of fluids or even filling of the brake system with an incorrect fluid.
Testing, removing, installing and repair work may only be performed by qualified personnel. Failure to observe the information described in this article may result in damage to the system and could make the vehicle unsafe.
CAUTION:
The anti-lock brake system is basically maintenance-free.
NOTE:
Fig. 5: ABS/ESP System, Component Overview
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Bracket for hydraulic control unit
2 - Brake booster vacuum pump
3 - ABS control module J104
4 - ABS hydraulic unit N55 with ABS control module J104
5 - Brake pressure sensor 1 G201
6 - ABS hydraulic unit N55 with ABS control module J104
7 - Rotor for right front speed sensor
8 - Right Front ABS Wheel Speed Sensor G45
9 - Brake fluid level warning switch F34
10 - Instrument cluster
11 - Anti-slip control switch E132
12 - Steering angle sensor G85
13 - Transverse Acceleration Sensor G200 and Rotation Rate Sensor G202
14 - Parking brake warning light switch F9
15 - Rotor for right rear speed sensor
16 - Right rear ABS wheel speed sensor G44
17 - Left rear ABS wheel speed sensor G46
18 - Rotor for left rear speed sensor
19 - Traction control indicator lamp K86
20 - ABS warning lamp K47
21 - Brake System Warning Lamp K118 ; "brake warning" symbol
22 - Brake light switch F
23 - Rotor for front left speed sensor
24 - Left front ABS wheel speed sensor G47
Special tools, testers and auxiliary items required
Fig. 6: Identifying Vehicle Diagnosis, Testing And Information System VAS 5051
Courtesy of VOLKSWAGEN UNITED STATES, INC.
CAUTION:
Fig. 7: Connecting Diagnostic Lead Connector VAS 5051/1 Or VAS 5051/3 At Data Link Connector (DLC)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 8: Special Tool - VAS 5051 & On Switch
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The tester is operational when it displays a picture of a car.
Wait until tester has interrogated all the control modules in the vehicle.
Now, all possible functions of Anti-lock Brake System (ABS) installed in vehicle are displayed.
Anti-Slip Regulation (ASR) is offered as optional equipment on front wheel drive vehicles.
The ABS brake system is divided diagonally. The brake booster assist is provided pneumatically by the vacuum brake booster unit.
Fig. 9: Anti-Lock Brake System (ABS) Bosch 5.7
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The hydraulic unit and control module form a single unit, which is referred to as the hydraulic control unit.
Malfunction sources are reduced by direct connection of components named. Hydraulic control module is serviced by replacing it.
The bolts which connect the individual components of the hydraulic control unit must not be loosened.
Fig. 10: Exploded View Of Hydraulic Unit And Brake Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake master cylinder and brake booster
2 - Brake line
3 - Brake line
4 - Brake line
5 - Brake line
6 - Brake line
7 - Brake line
8 - Brake pressure sensor 1 G201
9 - ABS Hydraulic Unit N55 with ABS Control Module J104
10 - Locking clip
11 - Spacer (4x)
12 - Vacuum pump
13 - Spacer (1x)
14 - Hex bolt (3x), 10 Nm
15 - Bracket
Special tools, testers and auxiliary items required
Fig. 11: Identifying Brake Pedal Depressor V.A.G 1869/2
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 12: Sealing Plug Repair Set, Part No. 1H0 698 311 A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Sealing plug repair kit, Part no. 1H0 698 311 A
Location:
Fig. 13: ABS Layout
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The hydraulic control unit is installed on left-hand side of engine compartment.
Removing
CAUTION:
Brake lines must not be bent.
Fig. 14: Removing Connector From Control Module
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The brake pedal actuator V.A.G 1869/2 must remain in position until all brake lines have been reconnected to the hydraulic unit.
NOTE:
Fig. 15: Loosening Securing Bolt And Pulling Coolant Expansion Tank
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 16: Identifying Brake Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
Fig. 17: Disconnecting Brake Lines And Sealing With Sealing Plugs From Repair Kit, Part No. 1H0 698 311 A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 18: Loosening Connectors & Unclipping Brake Lines From Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 19: Identifying Locking Clips
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
When installing, observe the following:
NOTE:
Tightening torques
Component
Nm
Brake lines to hydraulic unit M10 (brake line diameter 5 mm)
12
Brake lines to hydraulic unit M12 (brake line diameter 5 mm)
12
Brake lines to hydraulic unit M12 (brake line diameter 8 mm)
20
The following versions are possible with Bosch 8.0 ABS:
The ABS brake system is divided diagonally. The brake booster assist is provided pneumatically by the vacuum brake booster unit.
Malfunctions in the ABS system do not influence the brake system and booster. The conventional braking system remains functional even without ABS. A change in braking behavior must be looked at. After the ABS warning lamp comes on, the rear wheels can lock early when braking!
Malfunction sources are reduced by direct connection of components named. Hydraulic control module is serviced by replacing it.
Fig. 20: Identifying Control Module Bosch 8.0 ABS/EDL/ASR/ESP
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Bosch 8.0 ABS/EDL/ASR/ESP:
Removing and installing control module and hydraulic unit
--> Hydraulic control unit, removing and installing
Hydraulic unit and brake lines
Fig. 21: Exploded View Of Hydraulic Unit And Brake Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake master cylinder and brake booster
2 - Brake line
3 - Brake line
4 - Brake line
5 - Brake line
6 - Brake line
7 - Brake line
8 - ABS hydraulic unit N55 with ABS control module J104
9 - Spacer (2 x)
10 - Longitudinal member (body)
11 - Combi nut, 10 Nm
12 - ESP bracket
13 - Bolt with bonded rubber bushing, tightening torque 10 Nm
14 - Combi nut, 8 Nm
15 - Washer
Special tools, testers and auxiliary items required
Fig. 22: Identifying Torque Wrench V.A.G. 1331
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 23: Identifying Brake Pedal Depressor V.A.G 1869/2
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Location:
Fig. 24: Locating Hydraulic Unit
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Hydraulic unit is located on left-hand side of engine compartment.
CAUTION:
Brake lines must not be bent.
Fig. 25: Removing Plenum Chamber Cover
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 26: Removing Hex Bolts Securing Coolant Expansion Tank & Disconnecting Connector From Coolant Expansion Tank
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 27: Moving Coolant Expansion Tank Clear To One Side
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 28: Brake Pedal Depressor VAG 1869/2 Inserted Between Brake Pedal And Driver's Seat
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
CAUTION:
Do not bend the brake lines in the area of the hydraulic unit!
Fig. 29: Identifying Brake Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 30: Identifying Brake Line Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 31: Identifying Brake Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 32: Pushing Retaining Plate And Disconnecting Connector
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 33: Removing Hex Bolts
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse order of removal. Note the following:
NOTE:
Fig. 34: Connecting Brake Caliper & Piston Circuit Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - To right front brake caliper
2 - To left rear brake caliper
3 - To right rear brake caliper
4 - To left front brake caliper
5 - To primary piston circuit
6 - To secondary piston circuit
NOTE:
For this, use vehicle diagnosis, testing and information system VAS 5051.
NOTE:
Tightening torques
Component
Nm
Brake lines to hydraulic unit M10 (brake line diameter 5 mm)
12
Brake lines to hydraulic unit M12 (brake line diameter 5 mm)
12
Brake lines to hydraulic unit M12 (brake line diameter 8 mm)
16
Fig. 35: ABS System Components On Front Axle
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Hex socket head bolt
2 - Speed sensor
3 - Drive axle with rotor
4 - Speed sensor wire
5 - Hex socket head bolt
Vehicle must be standing on ground when tightening
Tightening torques: --> 42 - REAR SUSPENSION
Removing
Fig. 36: Unclipping Speed Sensor Wiring From Retainers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 37: Uncliping Speed Sensor Wiring From Retainers & Disconnecting Speed Sensor Connector
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 38: Releasing Grommet In Wheel Housing & Removing ABS Speed Sensor From Wheel Bearing Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Install wheels --> 44 - WHEELS, TIRES, VEHICLE ALIGNMENT .
NOTE:
Fig. 39: ABS System Components On Rear Axle (FWD Vehicles)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Rear brake caliper
2 - Wheel hub with rotor
3 - Collar bolt
Vehicle must be standing on the ground when tightening
4 - Brake disc
5 - Wheel bolt
Vehicle must be standing on the ground when tightening
6 - Wheel bearing housing
7 - Speed sensor
8 - Hex socket head bolt
9 - Ribbed bolt, 75 Nm
Removing
Fig. 40: Removing Hex Bolt, Speed Sensor From Wheel Bearing Housing, Loosening Torx Bolt And Removing Cable Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 41: Removing Hex Bolt, Loosening Torx Bolt And Pulling Out Cable Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 42: Uncliping Speed Sensor Wiring From Retainers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 43: Detaching Underside Cover
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 44: Disconnecting Speed Sensor Connector And Pressing Out Grommet
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse order of removal.
Removing
Installing
Installation is in reverse order of removal.
Fig. 45: ABS System Components On Rear Axle (AWD Vehicles)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Rear brake caliper
2 - Wheel hub
3 - Collar bolt
Vehicle must be standing on the ground when tightening
4 - Brake disc
5 - Wheel bolt
Vehicle must be standing on the ground when tightening
6 - Wheel bearing
7 - Wheel bearing housing
8 - Speed sensor
9 - Hex socket head bolt
10 - Drive axle with rotor
11 - Ribbed bolt, 75 Nm
Fig. 46: Removing Hex Bolt, Speed Sensor From Wheel Bearing Housing, Loosening Torx Bolt And Removing Cable Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 47: Removing Hex Bolt, Loosening Torx Bolt And Removing Cable Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 48: Uncliping Speed Sensor Wiring From Retainers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 49: Detaching Underside Cover
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 50: Disconnecting Speed Sensor Connector And Pressing Out Grommet
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse order of removal.
Removing and installing rotor on rear axle
Removing
Installing
Installation is in reverse order of removal.
NOTE:
NOTE:
Removing
Installing
Installation is in reverse order of removal. Note the following:
Fig. 51: Pulling Out Switch Plunger & Identifying Retainer Tabs On Switch
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 52: Guiding Switch Through Installation Hole, Pressing Against Pedal And Securing By Turning 45° Clockwise
Courtesy of VOLKSWAGEN UNITED STATES, INC.
After adjusting the brake light switch check whether the brake pedal is on the end stop (rest position).
Removing:
Fig. 53: Locating ESP Sensor
Courtesy of VOLKSWAGEN UNITED STATES, INC.
ESP sensor is located in center console beneath ashtray.
Fig. 54: Disconnecting ESP Sensor Connector
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 55: Locating ESP Sensor
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Tightening torque for nuts: 10 Nm.
Installing
Installation steps are carried out in reverse order:
NOTE:
Removing
NOTE:
Fig. 56: Loosening Securing Bolt And Pulling Coolant Expansion Tank
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 57: Loosening Connectors & Unclipping Brake Lines From Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 58: Identifying Brake Lines
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Remaining installation is in reverse order of removal.
NOTE:
Fig. 59: Exploded View Of Front Brakes C54
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake disc cover
2 - Collar bolt, 10 Nm
3 - Brake hose
4 - Spring clip
5 - Brake line, 15 Nm
6 - Self-locking bolt, 30 Nm
7 - Ribbed bolt, 190 Nm
8 - Brake carrier with guide pins and protective cap
9 - Brake disc
10 - Wheel bolts
11 - Torx bolt
12 - Heat shield
13 - Brake caliper housing
14 - Bracket
15 - Hex bolt, 10 Nm-
16 - Brake pads
17 - Connector
18 - Bracket
Fig. 60: Identifying Special Tools - Brake Pads, Removing And Installing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
Removing
NOTE:
Fig. 61: Brake Wear Pad Indicator Connector
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 62: Removing Securing Bolts From Brake Caliper Housing, While Counter-Holding On Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 63: Swinging Brake Caliper Housing Upward And Removing Brake Pads
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 64: Pressing Piston Back Into Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
CAUTION:
Brake fluid is poisonous and must never be extracted by mouth using a hose!
Installing
Use methylated spirits to clean brake caliper housing.
Fig. 65: Swinging Brake Caliper Housing Upward And Removing Brake Pads
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
Fig. 66: Exploded View Of Front Brakes FN3
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake disc cover
2 - Collar bolt, 10 Nm
3 - Brake hose
4 - Bracket
5 - Hex bolt, 10 Nm-
6 - Spring clip
7 - Brake line
8 - Connector
9 - Ribbed bolt, 190 Nm
10 - Brake carrier
11 - Brake pads
NOTE:
NOTE:
12 - Retaining spring
NOTE:
13 - Brake disc
14 - Torx bolt
15 - Wheel bolts
16 - Brake caliper housing
17 - Guide pins, 30 Nm
18 - Protective cap
Fig. 67: Identifying Special Tools - Brake Pads, Removing And Installing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
Removing
NOTE:
Fig. 68: Caliper Guide Pin Caps
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 69: Brake Wear Pad Indicator Connector
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 70: Removing Brake Pad Retaining Spring From Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 71: Removing/Installing Caliper Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Fig. 72: Pressing Piston Back Into Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Use methylated spirits to clean brake caliper housing.
NOTE:
CAUTION:
Brake fluid is poisonous and must never be extracted by mouth using a hose!
Fig. 73: Inserting Brake Pad With Retaining Spring Into Brake Caliper Housing (Piston)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 74: Inserting Brake Pad With Retaining Spring Into Brake Caliper Housing (Piston)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Mount wheels --> 44 - WHEELS, TIRES, VEHICLE ALIGNMENT .
NOTE:
NOTE:
Fig. 75: Exploded View Of Front Brakes FNR-G60
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake pads
NOTE:
NOTE:
2 - Brake carrier
3 - Ribbed bolt, 190 Nm
4 - Bearing bushing
5 - Guide pins, 30 Nm
6 - Protective cap
7 - Brake disc
8 - Wheel bolts
9 - Torx bolt
10 - Spring clip
11 - Brake line connection to brake hose, 15 Nm
12 - Brake line
13 - Brake line connection to brake caliper, 17 Nm
14 - Bracket
15 - Hex bolt M 8 x 16
16 - Brake caliper housing
17 - Retaining spring
NOTE:
Fig. 76: Identifying Special Tools - Brake Pads, Removing And Installing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
Removing
NOTE:
Fig. 77: Using Screwdriver To Pry Off Brake Pad Retaining Spring From Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 78: Turning Connector 90° While Using Screwdriver To Release Connector From Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 79: Detaching Brake Line From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 80: Removing Protective Caps
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 81: Securing Brake Caliper Housing To Brake Carrier With Both Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Use methylated spirits to clean the brake caliper housing.
Installing
Fig. 82: Pressing Piston Back Into Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
CAUTION:
Brake fluid is poisonous and must never be extracted by mouth using a hose!
Fig. 83: Inserting Inner Brake Pad With Retaining Spring In Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 84: Setting Outer Brake Pad With Retaining Springs Into Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 85: Securing Brake Caliper Housing To Brake Carrier With Both Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 86: Identifying Special Tools - Front Brakes, Brembo 18
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
NOTE:
CAUTION:
If brake pads are ceramics, wheel must not fall on brake disc, otherwise it will be irreparably damaged. To remove/install wheel, insert two assembly pins in wheel bolt mount.
Fig. 87: Exploded View Of Front Brakes, Brembo 18
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake disc
2 - Brake caliper
3 - Ribbed bolt, 200 Nm
4 - Bracket
5 - Hex head bolt, 25 Nm
6 - Brake line, 15 Nm
7 - Spring clip
8 - Brake hose
9 - Hex socket head bolt, 110 Nm
10 - Torx screw
11 - Retaining springs
12 - Brake pad retaining pins
13 - Brake pads
Special tools, testers and auxiliary items required
Fig. 88: Identifying Torque Wrench V.A.G. 1331
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 89: Piston Resetting Tool T10145
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
NOTE:
Fig. 90: Securing Brake Disc With A Wheel Bolt
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 91: Disconnecting Connector For Brake Pad Wear Indicator & Lifting Fixing Latch Somewhat On Lower Part Of Connector
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 92: Driving Out Brake Pad Retaining Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 93: Removing/Installing Retaining Springs
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Before pressing piston back, draw off brake fluid from reservoir using a bleeder bottle. Otherwise fluid will overflow and cause damage if the reservoir was topped off during repair work.
Installing
Before inserting new brake pads, press piston back into the cylinder using the piston resetting tool. Before pressing the piston back, draw off brake fluid from the reservoir with a bleeder bottle. Otherwise fluid will overflow and cause damage if the reservoir was topped off during repair work.
Fig. 94: Removing/Installing Retaining Springs
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 95: Inserting Brake Wear Indicator Connector And Wire Into Bracket On Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Mount wheels --> 44 - WHEELS, TIRES, VEHICLE ALIGNMENT .
NOTE:
Rear brakes with automatic adjustment
NOTE:
Fig. 96: Exploded View Of Brake Calipers C38
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake disc
2 - Ribbed bolt, 75 Nm
3 - Brake carrier with guide pins and protective caps
4 - Ribbed bolt, 75 Nm
5 - Brake pads
6 - Brake disc cover
7 - Collar bolt, 10 Nm
8 - Self-locking bolt, 35 Nm
9 - Brake caliper housing
10 - Wheel bolts
11 - Torx bolt
Fig. 97: Identifying Special Tools - Brake Pads, Removing And Installing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
Removing
NOTE:
Fig. 98: Removing Securing Bolts From Brake Caliper Housing, While Counter-Holding On Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Fig. 99: Installing Piston By Turning Reset And Screwing Out Tool 3272 In Clockwise Direction
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
CAUTION:
Brake fluid is poisonous and must never be extracted by mouth using a hose!
Fig. 100: Installing Brake Pads
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 101: Removing/Installing Securing Bolts From/To Brake Caliper Housing, While Counter-Holding On Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Mounting wheels --> 44 - WHEELS, TIRES, VEHICLE ALIGNMENT .
Rear wheel brakes with automatic adjustment
NOTE:
Fig. 102: Exploded View Of Rear Brakes C41/C43
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Self-locking hex bolt, 35 Nm
2 - Brake caliper housing
3 - Brake pads
4 - Brake pad retaining spring
5 - Wheel bolts
6 - Torx bolt
7 - Brake disc
8 - Hex socket head bolts, 75 Nm
9 - Brake carrier with guide pins and protective caps
10 - Banjo bolt, 45 Nm
11 - Brake line with banjo union
12 - Seals
Fig. 103: Identifying Special Tools - Brake Pads, Removing And Installing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
Removing
NOTE:
Fig. 104: Removing/Installing Securing Bolts From/To Brake Caliper Housing, While Counter-Holding On Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
Fig. 105: Removing/Installing Retaining Clip And Disconnecting/Connecting Parking Brake Cables At Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 106: Identifying Brake Pads, Guide Clips & Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Use methylated spirits to clean the brake caliper housing.
NOTE:
CAUTION:
Brake fluid is poisonous and must never be extracted by mouth using a hose!
Installing
Use methylated spirits to clean the brake caliper housing.
Fig. 107: Screwing In Piston By Turning Reset And Screw Out Tool 3272 Clockwise
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 108: Inserting Pad Retaining Springs
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 109: Identifying Brake Pads, Guide Clips & Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 110: Identifying Brake Pads Are Located Correctly In Anti-Rattle Springs
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 111: Removing/Installing Securing Bolts From/To Brake Caliper Housing, While Counter-Holding On Guide Pins
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Mounting wheels --> 44 - WHEELS, TIRES, VEHICLE ALIGNMENT .
Rear wheel brake with automatic adjustment
NOTE:
Fig. 112: Exploded View Of Rear Brakes, RS4 (Model 8EC)/C43
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Hex socket head screw with damper, self-locking, 35 Nm
NOTE:
2 - Hex socket head screw, self-locking, 35 Nm
3 - Brake caliper housing
4 - Brake pads
5 - Brake pad retaining spring
6 - Wheel bolts
7 - Torx bolt
8 - Brake disc
9 - Hex socket heat screw, 75 Nm
10 - Brake carrier with guide pins and protective cap
11 - Banjo bolt, 45 Nm
12 - Brake line with banjo fitting
13 - Seals
Removing:
Fig. 113: Removing/Installing Retaining Clip And Disconnecting/Connecting Parking Brake Cables At Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 114: Uncliping Brake Line From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 115: Uncliping Parking Brake Cables From Fuel Tank (Clip)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 116: Uncliping Parking Brake Cables From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Before installing new parking brake cables you must remove the parking brake lever and reset the mechanism.
Removing and installing parking brake lever --> Parking brake handle, removing and installing
Installing
Fig. 117: Clipping On Parking Brake Cable Until It Engages
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 118: Uncliping Parking Brake Cables From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 119: Removing/Installing Retaining Clip And Disconnecting/Connecting Parking Brake Cables At Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 120: Identifying Positioning Rings Should Be On Inner Side Of Clips On Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 121: Adjusting Lever Position At Brake Calipers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
For ease of illustration the diagram shows parking brake lever removed from vehicle.
Fig. 122: Identifying Collar Nuts & Parking Brake Lever
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 123: Adjusting/Checking Lever Position At Brake Calipers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Removing:
Fig. 124: Removing/Installing Retaining Clip And Disconnecting/Connecting Parking Brake Cables At Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 125: Uncliping Brake Cable From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 126: Uncliping Brake Cable From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 127: Uncliping/Clipping Brake Cables From/To Retainers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Before installing new parking brake cables you must remove the parking brake lever and reset the mechanism.
Removing and installing parking brake lever --> Parking brake handle, removing and installing
Installing
Fig. 128: Clipping On Parking Brake Cable Until It Engages
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 129: Uncliping/Clipping Brake Cables From/To Retainers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
Fig. 130: Removing/Installing Retaining Clip And Disconnecting/Connecting Parking Brake Cables At Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 131: Uncliping Brake Cable From Retainer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 132: Releasing Handle With Screwdriver
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 133: Removing Cover And Handle
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 134: Removing Hex Bolts And Carrier
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 135: Tightening Torque For Hex Bolt & Torque For Adapter With Washer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 136: Identifying Collar Nuts & Parking Brake Lever
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Reset adjusting mechanism
Fig. 137: Releasing Mechanism With Screwdriver & Pressing Back Second Spring-Loaded Hook With Another Screwdriver
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse order of removal.
Fig. 138: Clipping On Parking Brake Cable Until It Engages
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 139: Inserting Parking Brake Cable Into Compensator
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 140: Tightening Torque For Hex Bolt & Torque For Adapter With Washer
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 141: Adjusting Lever Position At Brake Calipers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
For ease of illustration the diagram shows parking brake lever removed from vehicle.
Fig. 142: Identifying Collar Nuts & Parking Brake Lever
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 143: Adjusting Lever Position At Brake Calipers
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 144: Releasing Handle With Screwdriver
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 145: Removing Cover And Handle
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 146: Removing Hex Bolts And Carrier
Courtesy of VOLKSWAGEN UNITED STATES, INC.
With two cables attached
NOTE:
With one cable attached
Fig. 147: Releasing Mechanism With Screwdriver & Pressing Back Second Spring-Loaded Hook
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 148: Identifying Collar Nuts & Parking Brake Lever
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Resetting adjustment mechanism
Fig. 149: Releasing Mechanism With Screwdriver & Pressing Back Second Spring-Loaded Hook With Another Screwdriver
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
NOTE:
Fig. 150: Aligning Parking Brake Cable So That It Is In The Middle Of Recess For Center Console
Courtesy of VOLKSWAGEN UNITED STATES, INC.
CAUTION:
The brake pedal travel must not be restricted/shortened by additional floor coverings.
Fig. 151: Brake Pedal, Assembly Overview
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Instrument panel cross member
2 - Retaining clip (2x)
3 - Pin
4 - Mounting bracket
5 - Hex socket head bolt, 10 Nm
6 - Accelerator module
7 - Combi bolt, 25 Nm
8 - Brake light switch
9 - Clutch switch
10 - Socket head bolts, 5 Nm
11 - Combi bolt, 20 Nm
12 - Brake pedal
13 - Master cylinder
14 - Spring
15 - Retainer
16 - Clutch pedal
17 - Pin
Special tools, testers and auxiliary items required
Fig. 152: Release Tool T40024
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 153: Loosening Anti-Rotation Device (Socket Head Bolt) On Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 154: Loosening Anti-Rotation Device (Socket Head Bolt) On Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 155: Rotating Brake Light Switch 45° In Counter-Clockwise Direction And Remove
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 156: Using Release Tool T40024 To Separate Brake Pedal From Brake Booster
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 157: Removing Circlip On Right Side
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Fig. 158: Loosening Anti-Rotation Device (Socket Head Bolt) On Bracket
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installation is in reverse order of removal.
Special tools, testers and auxiliary items required
Fig. 159: Brake Pressure Gauge V.A.G 1310 A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Before starting:
Make sure that the brake system (master cylinder, brake hoses, brake lines and brake calipers) is free of leaks.
High-pressure test:
Fig. 160: Brake Pressure Gauge 0-250 Bar V.A.G 1310A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
If pressure drops by more than 4 bar, inspect brake system for leaks and repair as required.
Low-pressure testing:
NOTE:
If drop in pressure exceeds specification: replace ABS hydraulic unit.
Special tools, testers and auxiliary items required
Fig. 161: Brake Pressure Gauge 0-250 Bar V.A.G 1310A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Make sure adequate brake booster pressure for this test.
Before starting:
Make sure that the brake system (master cylinder, brake hoses, brake lines and brake calipers) works properly and is free of leaks.
Troubleshooting procedure if pads are worn on one side of the vehicle:
Simulate brake applications at various pressures up to approx. 100 bar.
If wheel is difficult to turn and there is no residual pressure in the system:
If wheel is difficult to turn and there is residual pressure in the system:
Checking brake master cylinder
NOTE:
Fig. 162: Exploded View Of Brake Caliper C54
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Dust cap
2 - Bleeder valve
3 - Brake caliper housing
4 - Self-locking bolts, 30 Nm
5 - Seal
6 - Piston
7 - Protective seal
8 - Brake carrier with guide pins and protective caps
Special tools, testers and auxiliary items required
Fig. 163: Identifying Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 164: Piston Resetting Tool T10145
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 165: Force Piston Out Of Brake Caliper Housing Using Compressed Air
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 166: Removing Seal Using Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Installing
Fig. 167: Placing Protective Seal With Outer Sealing Lip On Piston
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 168: Inserting Inner Sealing Lip Into Groove In Cylinder
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 169: Pressing Piston Into Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
Fig. 170: FN3 Brake Caliper, Overview
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Cap
2 - Guide pins, 30 Nm
3 - Bleeder valve, 10 Nm
4 - Protective cap
5 - Brake caliper housing
6 - Retaining spring
NOTE:
7 - Bushing
8 - Brake carrier
9 - Seal
10 - Piston
11 - Protective cap
Special tools, testers and auxiliary items required
Fig. 171: Identifying Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 172: Piston Resetting Tool T10145
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 173: Force Piston Out Of Brake Caliper Housing Using Compressed Air
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 174: Removing/Installing Seal Using Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Installing
Fig. 175: Removing/Installing Seal Using Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 176: Placing Protective Cap With Outer Sealing Lip On Piston
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 177: Inserting The Inner Sealing Lip Into The Grove In The Cylinder Using Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 178: Pressing Piston Into Brake Caliper Housing Using Piston Resetting Tool T10145
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
NOTE:
Fig. 179: Exploded View Of Brake Caliper FNR-G60
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake carrier
2 - Guide pins, 30 Nm
3 - Dust cap
4 - Protective cap
5 - Bleeder valve, 15 Nm
6 - Bearing bushing
7 - Brake caliper housing
8 - Retaining spring
9 - Protective seal
10 - Piston
11 - Seal
Fig. 180: Identifying Special Tools - Front Brake Caliper Piston, Removing And Installing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Special tools, testers and auxiliary items required
Removing
Fig. 181: Using Compressed Air To Force Piston Out Of Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 182: Removing Seal With Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Installing
Fig. 183: Installing Sealing Ring In Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 184: Pressing Protective Cap With Assembly Tool And Piston Resetting Tool Into Brake Caliper
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 185: Pushing Protective Seal Onto Brake Caliper Housing So That It Lies Against Housing All Round
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 186: Lifting Up Piston With Standard Extension And Ratchet Attachment
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Use jaw protectors
NOTE:
NOTE:
Fig. 187: Exploded View Of Brake Caliper, Brembo 18
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Dust cap
2 - Bleeder valve, 12 Nm
3 - Brake caliper housing
4 - Seal, 32 mm piston
5 - Seal, 28 mm piston
6 - Piston, 32 mm
7 - Piston, 28 mm
8 - Protective cap for 32 mm piston
9 - Protective cap for 28 mm piston
10 - Support plate
11 - Hex socket head bolt, 6 Nm
12 - Connecting line, 17 Nm
Special tools, testers and auxiliary items required
Fig. 188: Identifying Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 189: Piston Resetting Tool T10145
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 190: Forcing Pistons Out Individually Of Brake Caliper Housing Using Compressed Air
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Only one piston can be forced out at a time. When doing this, hold the opposing piston in the caliper using the piston resetting tool - a -. Block = other pistons using a suitable item, such as a block of wood - b -. When using piston resetting tool, place an additional piece of wood - c - between tool and piston to prevent damage to the piston when it is pushed out.
Fig. 191: Removing Seal Using Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
When removing make sure that the surface of the cylinder is not damaged.
Installing
Fig. 192: Inserting Oil Seal In Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 193: Placing Protective Seal On Piston
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 194: Using Equal Pressure To Push Piston Into Brake Caliper Housing
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The protective seal should locate securely in the piston groove. If not, use piston resetting tool to push piston in further.
NOTE:
Fig. 195: Exploded View Of Rear Brake Caliper C38
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Self-locking bolt, 35 Nm
2 - Brake caliper housing with lever for parking brake cable
3 - Bleeder valve
4 - Dust cap
5 - Sealing ring
6 - Piston with automatic adjustment
7 - Guide pin
8 - Protective seal
9 - Protective cap
10 - Brake carrier with guide pins and protective cap
Special tools, testers and auxiliary items required
Fig. 196: Resetting Extracting Tool T10165
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 197: Plate 3272/1
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 198: Identifying Trim Removal Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Removing
Fig. 199: Extracting Piston From Brake Caliper Housing By Turning Knurled Wheel Counter-Clockwise
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 200: Removing Seal Using Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Installing
Fig. 201: Placing Protective Seal With Outer Sealing Lip On The Piston
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 202: Inserting Inner Sealing Lip Into The Grove In The Cylinder Using Wedge 3409
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 203: Extracting Piston From Brake Caliper Housing By Turning Knurled Wheel Counter-Clockwise
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Pre-bleeding brake caliper
Fig. 204: Identifying Bleed Valve, Standard Bleeder Bottle & Threaded Hole
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Changing brake fluid
Description of operations; Changing brake fluid (every 2 years)
CAUTION:
NOTE:
NOTE:
Special tools, testers and auxiliary items required
Fig. 205: Identifying Brake Filler And Bleeder Unit VAS 5234
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Bleeding brake system using brake filler and bleeder unit VAS 5234
Follow operating instructions.
Bleed sequence
1 - Left front brake caliper
2 - Right front brake caliper
3 - Left rear brake caliper
4 - Right rear brake caliper
Changing brake fluid
Description of operations; Changing brake fluid (every 2 years)
NOTE:
Fig. 206: Tandem Brake Booster/Brake Master Cylinder, Assembly Overview
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - - a - Vacuum hose
1 - - b - Vacuum hose
2 - Trunnion bolt, 8 Nm
3 - Brake fluid reservoir with float warning indicator
4 - Filler cap
5 - Sealing plug
6 - Brake booster
7 - Pedal bracket
8 - Supply hose
9 - Bulkhead
10 - Bolt, 25 Nm
11 - Collar nut, 50 Nm
12 - Brake master cylinder
13 - Brake line, 15 Nm
14 - Sealing ring
Fig. 207: Adjusting Ball Plunger
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Adjusting ball head
a = 159 mm ± 0.5 mm
NOTE:
Tightening torque for ball head to brake booster: 30 Nm
Special tools, testers and auxiliary items required
Fig. 208: Release Tool T40024
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 209: Sealing Plug Repair Set, Part No. 1H0 698 311 A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Sealing plug repair kit, Part no. 1H0 698 311 A
Removing
Fig. 210: Rotating Brake Light Switch 45° In Counter-Clockwise Direction And Remove
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 211: Using Release Tool T40024 To Separate Brake Pedal From Brake Booster
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Extracting brake fluid using brake filler/bleeder unit VAS 5234
Fig. 212: Open Brake Fluid Reservoir
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 213: Extracting Brake Fluid Using Brake Filler And Bleeder Unit VAS 5234
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 214: Location Of Brake Fluid Level Warning Switch F34 And Vacuum Hose
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 215: Location Of Brake Fluid Reservoir Dowel Bolt
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 216: Disconnecting Brake Lines And Sealing With Sealing Plugs From Repair Kit, Part No. 1H0 698 311 A
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 217: Disconnecting Brake Lines And Removing Together With Rubber Grommet
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 218: Removing Brake Booster Securing Bolts
Courtesy of VOLKSWAGEN UNITED STATES, INC.
On vehicles installed with cross brace the cross brace must be removed.
Fig. 219: Brake Master Cylinder Nuts
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
When installing, note the following points:
NOTE:
The vacuum pump is not intended to be serviced. If problems occur, trace the malfunction by means of a function test and/or pressurized leak test. If a malfunction is found, the brake system vacuum pump V192 must be replaced.
Removing:
Fig. 220: Disconnecting Electrical Connector & Vacuum Hose From Vacuum Pump
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 221: Identifying Brake System Vacuum Pump V192
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is carried out in reverse sequence.
Special tools, testers and auxiliary items required
Fig. 222: Identifying Vehicle Diagnosis, Testing And Information System VAS 5051
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Procedure
Fig. 223: Special Tool - VAS 5051 & On Switch
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The tester may need up to 3minutes before it is ready for operation.
The control module identification and coding will appear at top right of display.
The following information will appear at the bottom of the display:
Basic setting
Not operated
Pump off
xxx mbar
Test off
The following information will appear at bottom of display:
Basic setting
Not operated
Pump on
xxx mbar
Test on
Do not press brake pedal again once test has been activated.
The Brake System Vacuum Pump V192 supplies vacuum to brake booster. The diagnosis of the brake booster system runs in the control module at the same time.
The system passes the test if the pressure in the brake booster reaches the shut-off threshold within time limit set by diagnostic function.
The following information will appear at bottom of display:
Basic setting
Not operated
Pump off
xxx mbar
Syst. OK
The system fails the test if pressure in brake booster does not reach shut-off threshold within time limit set by diagnostic function.
The following information will appear at bottom of display:
Basic setting
Not operated
Pump off
xxx mbar
Syst.n.OK
Removing
Fig. 224: Removing Bolts
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 225: Disconnecting Brake System Vacuum Pump V192 From Non-Return Valve
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse sequence.
Fig. 226: Locating Check Valve
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Note correct installation position.
Fig. 227: Brake System Vacuum Pump V192 Assembly Overview
Courtesy of VOLKSWAGEN UNITED STATES, INC.
1 - Brake booster pressure sensor G294
2 - Brake booster
3 - Brake booster relay J569
4 - Vacuum pump for brakes V192
5 - Vacuum hose
6 - Check valve
7 - Vacuum hose
The vacuum pump is not intended to be serviced. If problems occur, trace the malfunction by means of a function test and/or pressurized leak test. If a malfunction is found, the brake system vacuum pump V192 must be replaced.
Removing:
Fig. 228: Disconnecting Electrical Connector & Vacuum Hose From Vacuum Pump
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig. 229: Identifying Brake System Vacuum Pump V192
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse order of removal.
Special tools, testers and auxiliary items required
Fig. 230: Identifying Vehicle Diagnosis, Testing And Information System VAS 5051
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Procedure
Fig. 231: Special Tool - VAS 5051 & On Switch
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The tester may need up to 3 minutes before it is ready for operation.
The control module identification and coding will appear at top right of display.
The following information will appear at the bottom of the display:
Basic setting
Not operated
Pump off
xxx mbar
Test off
The following information will appear at bottom of display:
Basic setting
Not operated
Pump on
xxx mbar
Test on
Do not press brake pedal again once test has been activated.
The Brake System Vacuum Pump V192 supplies vacuum to brake booster. The diagnosis of the brake booster system runs in the control module at the same time.
The system passes the test if the pressure in the brake booster reaches the shut-off threshold within time limit set by diagnostic function.
The following information will appear at bottom of display:
Basic setting
Not operated
Pump off
xxx mbar
Syst. OK
The system fails the test if pressure in brake booster does not reach shut-off threshold within time limit set by diagnostic function.
The following information will appear at bottom of display:
Basic setting
Not operated
Pump off
xxx mbar
Syst.n.OK
Removing
Fig. 232: Removing Bolts
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
Fig. 233: Disconnecting Brake System Vacuum Pump V192 From Non-Return Valve
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Installing
Installation is in reverse order of removal.
Fig. 234: Locating Check Valve
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Note correct installation position.
Indicated on display (function selection): Vehicle system - test HELP Select function XX
Indicated on display: Read measured value block HELP Enter display group number XXX
Display group 008
Read measured value block
8 -->
Indicated on display:
Operated/not operated
Pump off Pump on
XXX mbar
Test off/Test on
Test
Vacuum
Vacuum pump
Brake pedal:
DTC code
DTC text
Corrective action
SAE
V.A.G
P1427
17835
Activation of vacuum pump for brake system, short to positive
P1428
17836
Activation of vacuum pump for brake system, short to earth
P1429
17837
Activation of vacuum pump for brake system, open circuit
P1479
17887
Vacuum system for brakes, mechanical malfunction
DTC code
DTC text
Corrective action
SAE
V.A.G
P1912
18320
Brake booster pressure sensor G294, open circuit/short to positive
P1913
18321
Brake booster pressure sensor G294, open circuit/short to earth
P1914
18322
Brake booster pressure sensor G294, implausible signal
Only vehicles with automatic transmission are equipped with an electric vacuum pump. It is switched on by the engine control module, depending on intake manifold pressure.
The vacuum pump can be tested with On Board Diagnostic (OBD): any detected malfunctions are stored in the engine control module.
The engine must not be running when checking the function of the electrical vacuum pump via (OBD).
Test requirements:
NOTE:
Procedure
Fig. 235: Identifying Vehicle Diagnosis, Testing and Information System VAS 5051 and Data Link Connector (DLC)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
* See note Indicated on display:
V.A.G - SELF-DIAGNOSIS HELP
1 - Rapid data transfer
V.A.G - SELF-DIAGNOSIS HELP
2- Flash code output
and
* alternating displays
NOTE:
If the following is indicated on display:
Rapid data transfer HELP
Enter address word XX
NOTE:
The scan tool V.A.G 1551 will display the control unit identification details, for example:
3B0907552A 2.7ltr. V6/5V G 0002 ->
Coding 05002 WSC 12345
NOTE:
Control module identification (example)
Part No, allocation.
Engine capacity
Engine design (V-engine with 6 cylinders, 5 valves)
Vehicle with or without cruise control system
Data level (software version) of the control module
Control module code
Dealership identifier of V.A.G 1551 with which coding was last performed
After establishing diagnostic communication, checking the control module version and pressing the --> key proceed as follows:
Indicated on display: (Function selection, e.g. 02 - interrogate DTC memory)
Rapid data transfer HELP
Select function XX
The engine control module provides the following functions for carrying out self-diagnosis on the vacuum pump:
02 -
Interrogating DTC memory
03 -
Final control diagnosis
04 -
Initiating basic setting
08 -
Reading measured value block
Indicated on display (function selection):
Vehicle system - test HELP
Select function XX
Indicated on display (function selection):
Basic setting
Enter display group number XXX
Indicated on display (function selection):
System in basic setting 8 off (4 on) ->
not oper. Pump off XXX mbar test off
Indicated on display (function selection):
System in basic setting 8 on (8 off) ->
Oper./not oper. Pump on XXX mbar test on
The pump evacuates the brake booster. The diagnosis of the brake booster system runs in parallel in the control module. The system passes the test if the pressure in the brake booster reaches the shut-off threshold within the time limit set by the diagnostic function (max. 20 sec).
Indicated on display (function selection):
System in basic setting 8 on (8 off) ->
not oper. Pump off XXX mbar system OK
or:
Indicated on display (function selection):
System in basic setting 8 ->
not oper. Pump off XXX mbar Syst.n.OK
If the test shows the system is not OK, read out the DTC memory and repair the malfunction (ignition must be switched off!).
Indicated on display (function selection):
Vehicle system - test HELP
Select function XX
Indicated on display (function selection):
Final control diagnosis
Actuation of vacuum pump for brake system
The electric vacuum pump should now run for approx. 10 sec.
Indicated on display (function selection):
Vehicle system - test HELP
Select function XX
Indicated on display:
Read measured value block HELP
Enter display group number XXX
Display group 008
Read measured value block
8 -->
Indicated on display:
Operated/not operated
Pump off Pump on
XXX mbar
Test off Test on
Test
Vacuum
Vacuum pump
Brake pedal:
DTC code
DTC text
Corrective action
SAE
V.A.G
P1427
17835
Brake vacuum pump activation Short circuit to B+
P1428
17836
Brake vacuum pump activation Short circuit to Ground (GND)
P1429
17837
Activation of brake vacuum pump Open circuit
P1479
17887
Brake vacuum system Mechanical malfunction
DTC code
DTC text
Corrective action
SAE
V.A.G
P1912
18320
Brake booster pressure sensor G294 , circuit to B+
P1913
18321
Brake booster pressure sensor G294 , Short circuit to Ground (GND)
P1914
18322
Brake booster pressure sensor G294 , Unplausible signal
Replacement brake hoses and brake lines are supplied as spare parts ready to be installed.
Secure brake hoses and brake lines to the original locations when installing.
Brake caliper C54
Brake carrier to wheel bearing housing
190 Nm
Brake caliper to brake carrier
30 Nm
Brake caliper FN3
Brake caliper to brake carrier
30 Nm
Brake carrier to wheel bearing housing
190 Nm
Brake caliper FNR-G60
Brake caliper to brake carrier
30 Nm
Brake carrier to wheel bearing housing
190 Nm
Bleeder valve to brake caliper
10 Nm
Bleeder valve to brake caliper FNR-G60
15 Nm
Hydraulic unit with bracket to longitudinal member (Bosch 8.0)
10 Nm
ABS sensors to wheel bearing housing
10 Nm
Splash plates to wheel bearing housing
10 Nm
Rear brake caliper C38
Brake hose to brake caliper (banjo union with banjo bolt)
38 Nm
Brake caliper to brake carrier
35 Nm
Brake carrier to wheel bearing housing
75 Nm
Rear brake caliper C43
Brake hose to brake caliper (banjo union with banjo bolt)
38 Nm
Brake caliper to brake carrier
35 Nm
Brake carrier to wheel bearing housing
75 Nm
Brembo 18" brake caliper
Brake caliper to brake carrier
110 Nm
Brake carrier to stub axle carrier
190 Nm
Bleeder valve to brake caliper
10 Nm
Brake lines to brake hoses
15 Nm
ABS sensors to wheel bearing housing
10 Nm
Brake pads to wheel bearing housing
10 Nm