ABS/ESP, component overview

The following list pertains to Fig 1 .

1. Hydraulic pump for traction control -V156- for ESP 
2. Sender 1 for brake booster -G201- in driving dynamic control - pump for ESP 
3. ABS return flow pump relay -J105- Bosch 5.3 
4. ABS Solenoid Valve Relay -J106- Bosch 5.3 
5. ABS Hydraulic Unit -N55- with ABS control module (w/EDL) -J104- 
6. ABS Control Module (w/EDL) -J104- Bosch 5.0 
   • Installed position in instrument cluster
7. Brake fluid level warning switch -F34- 
8. Rotor for right front ABS wheel speed sensor 
   • Checking, see ABS WHEEL SPEED SENSOR ROTOR, CHECKING  , and AXLE SHAFTS and SUSPENSION - FRONT
9. Right front ABS wheel speed sensor -G45- 
   • Removing and installing, see ABS WHEEL SPEED SENSOR, REMOVING AND INSTALLING 
10. ABS Control Module (w/EDL) -J104- for ESP 
    • Installed position in instrument cluster
11. Steering Angle Sensor -G85- for ESP 
    • Installation location: installed on steering column
    • Removing and installing

      See STEERING .

12. Anti-Slip Control Switch -E132- 
    • Installed position at center console
13. Steering angle sensor -G85- 
    • In one housing with airbag spiral spring
    • Removing and installing, see STEERING ANGLE SENSOR -G85-, REMOVING AND INSTALLING 
14. Parking brake warning light switch -F9- 
    • Installed position at parking brake assembly
15. Rotor for right rear ABS wheel speed sensor 
    • Rotor is welded to wheel hub. Removing and installing

    See SUSPENSION - REAR .

16. Right rear ABS wheel speed sensor -G44- 
    • Removing and installing, see ABS WHEEL SPEED SENSOR, REMOVING AND INSTALLING 
17. Left rear ABS wheel speed sensor -G46- 
    • Removing and installing, see ABS WHEEL SPEED SENSOR, REMOVING AND INSTALLING 
18. Rotor for left rear ABS wheel speed sensor 
    • Checking, see ABS WHEEL SPEED SENSOR ROTOR, CHECKING 
    • Rotor is welded to wheel hub. Removing and installing

    See SUSPENSION - REAR .

19. Sensor for transverse acceleration -G200- 
    • New version with sensor for rotation rate -G202- in one housing
    • Removing and installing, see SENSOR FOR TRANSVERSE ACCELERATION -G200- AND SENDER FOR ROTATION RATE -G202-, REMOVING AND INSTALLING 
20. Sender for rotation rate -G202- 
    • Removing and installing, see SENSOR FOR TRANSVERSE ACCELERATION -G200- AND SENDER FOR ROTATION RATE -G202-, REMOVING AND INSTALLING 
21. ABS return flow pump relay -J105- only for Bosch 5.3 
    • Installed position at fuse box
22. ABS Solenoid Valve Relay -J106- 5.3 Bosch 5.3 
23. Warning light for brake system -K118-, malfunction symbol 
    • Installed position in instrument cluster in Driver Information System (DIS)
24. ABS warning light -K47- 
    • Installed position in instrument cluster
25. Parking brake indicator light -K14- 
    • Installed position in instrument cluster
26. Traction control indicator light -K86- 
    • Installed position in instrument cluster
27. Brake light switch -F- 
    • Removing and installing brake light switch, see BRAKE LIGHT SWITCH, REMOVING AND INSTALLING 
28. Rotor for front left ABS wheel speed sensor 
    • Checking, see ABS WHEEL SPEED SENSOR ROTOR, CHECKING 

    See SUSPENSION - FRONT and AXLE SHAFTS .

29. Left front ABS wheel speed sensor -G47- 
    • Removing and installing, see ABS WHEEL SPEED SENSOR, REMOVING AND INSTALLING 
Fig 1: Identifying ABS/ESP Components
Courtesy of AUDI OF AMERICA, INC.