Audi A6 (4F) Brake Electronics

From Ross-Tech Wiki


Most repair manual sources do not cover this Bosch 8.0 ABS system. When the module is replaced with new it is advised to use the original coding value from the old unit. If this is not possible, registered users can contact us directly with a complete Auto Scan and VIN number.

Minor modifications for retrofitting purposes include:

  • +0016384 = Trailer Hitch not installed or w/o Control Module for Trailer/Towing Sensor (J345)

Basic Setting

Steering Angle Sensor (G85) Calibration

  • Start Engine
  • Turn the steering wheel to end stops (left/right) then straight ahead.

[03 - ABS Brakes]

[Meas. Blocks - 08]
Group 005 Field 1 (Steering Angle Sensor -G85-)
Specification: 0.0 °
Tolerance (when straight): ±5.0 °
[Done, Go Back]

[Security Access - 16]
Enter 40168
[Do It!]

[Basic Settings - 04]
Group 001
Activate the Basic Setting.
After a successful basic setting, field 3 should say "OK".
[Done, Go Back]

[Fault Codes - 02]
All fault codes should have disappeared.
[Done, Go Back]

[Close Controller, Go Back - 06]

Special Note

  • After doing the G85 Calibration, you may get a 01486 - System Function Test Active, this is normal. Please see 01486.


  • First, Code the module with the original coding value from the old unit. No Login or Security Access is needed.
  • Next, perform the G85 Calibration.
  • Make sure that no faults are present and that the ABS and ESP lamps are off when you exit out of the controller.