Audi A6 (C6)

This page is under construction, and information here may be inaccurate or incomplete.

Engines

Cracks in the ABS exciter rings on the CV axles may cause the ABS to engage under light braking pressure
Misalignment of the front bumper or the doors may indicate the vehicle was in an accident; check for uneven panel gaps around the grille, headlights, and window frames
Electronic parking brake may not function, test several times
Front control arm bushings usually have a lifespan of around ~100k miles depending on road conditions
TSB – A/C may stop working due to pressure/temperature sensor G395 leaking refrigerant; there is an upgraded sensor available (part # 4F0959126C)
Tail lights may develop internal condensation due to improper sealing; replace the seal and/or put silicone around the edges of the light
Window regulators
If you cannot remotely unlock the doors, the door modules may need reprogramming
Coolant level warning may occur in cold temperatures then disappear when the engine warms up due to a bad sensor
If you can’t remove the key from the ignition when you shift to park, you likely need a new transmission shift selector
If the fuel gauge does not display “full” after refueling, the instrument cluster may need to be updated

Early models: Fuel door may not open because the cable is jammed
Early models: Driver window switch panel may work intermittently
MY05-06: TSB – A chirping/squeaking noise may occur when shifting to 4th gear or there may be a shudder. This is caused by a vibration during the control phase of the transmission torque converter clutch. Fixing requires reprogramming the transmission, changing the transmission fluid, and going for an adaptation drive.
MY05-07: TSB – Heater core pump valve can become clogged up with engine debris and cause the climate control to malfunction
MY05-07: TSB – Whining noise during deceleration is caused by wear in the bearing and bearing carrier in the rear differential housing
MY05-09: Steering lock actuator may prevent vehicle from starting