Three problems related to brake light on have been reported for the 1999 Audi A6. The most recently reported issues are listed below.
Abs module failure, abs system failed, abs warning light on , alarm and brake warning light on. Common failure on this model bosch unit.
I drive a 1999 Audi A6 avant which is our primary family car. While driving the car one day, the car's abs warning indicator light comes on and stays illuminated until the car is shut off. At the same time the red brake warning light flashes on and off until the car is turned off. This same thing happens every time the car is turned on. Despite the flashing warning lights, the brakes operated normally on dry pavement. However, on wet, snowy pavement the abs did not work when braking for a stop. I called the Audi dealer to make an appointment for this problem (and other issues) because I was concerned about the safety of the brakes especially during the winter. The person I spoke with at the Audi dealership did not sound alarmed or very concerned about the warning lights for the abs and the brake. I asked again about the safety issue, and the person said I would be fine and made an appointment for me for two and a half weeks later. We drove the car carefully for the next two and a half weeks until our appointment at Audi. Before even looking at the car, Audi service desk said that the warning lights were probably, more than likely the abs control module. I was told it would cost $975 to replace the abs control module. I didn't have the dealership replace that abs module yet because I needed other repairs first. After researching the abs control module online and after talking to a few people I realize that is a very common problem for this make and model car and for other Audi cars but there is no recall campaign in effect for the batch of faulty abs modules. I live in minnesota where there is potential to be snow 5 months out of the year. I bought this car used because of all the safety features that are useful in snowy weather. To have the abs not functioning properly and then to realize that this is a common problem in this make of car seems to me to be a safety issue that should be addressed by the manufacture. Audi should recall the abs module. Thanks.
(1) abs/brake light indicators appeared on the dash. The amber (abs light) stays on while the red brake light blinks. An Audible alert sounds for 3 seconds, but the lights stay on. This indicates that the abs control module is malfunctioning, thus loosing abs abilities. (2) after researching through Audi forums (audiworld. Com or Audiforums. Com), I discovered this is a common occurrence in Audi's (1997-2001), including a4's, A6's and vw passats. It is speculated that water or moisture seeks into the module computer board, thus shorts it out. It was confirmed by my Audi dealer that my abs unit is defective. I received a $2,400 estimate to have it repaired. (3) nothing, too expensive- my bigger issue here is safety- most Audi/vw owners aren't aware that this is a recurring/frequent problem in their cars, because it's usually caught under warranty. If you?re like me and have an expired warranty you are paying through the nose. I called Audi of America to alert them about this defect and asked them to recall it nationally- they said no because my car is older. To that point, why did they recall the throttle body, lower control arms and a plastic wire protector on 12/15/04 if my car is so-called "older?" again they can't justify it. That leads me to believe that it would cost them too much money! I am hoping that someone doesn't get injured because of money or it takes an accident to get this (abs module) defect recalled, then I am sure Audi will end up paying 10x more. Please make this recall happen as well as ask Audi to inform their owners about this problem.