ABS computer module failure. On the instrument panel, the ABS light came on whle the brake light was flashing and beeping. Took it ot the dealer and the ABS pump with controller was/is bad. The part with labor is $1600. After some research, this part goes bad alot and is a major safty issue. If you brake hard the rear wheels will lock up and the car could spin out of control.

- San Francisco, CA, USA

Just driving one evening and the ABS/brake light came on. The ABS controller was at fault. Did some research, and a significant number of people w/ the same car has the same problem.

- Framingham, MA, USA

Purchased my 2000 Audi S4 from the original owner- the car had 10K miles on it and yes, it was out of warranty. At about 13.5K miles I noticed that I had trouble stopping one evening- almost rear ending someone in the process because my brake pedal went all the way to the floor. Parked the car that night-and then about 4 hours later, on my way home...same symptoms as mentioned before, except now my ABS light was on. Ext mourning...moved car out of driveway and noticed a oil puddle from the left front drivers side engine area. I began to search for the leak with the help from a local friend and he suggested-last resort-to check the ABS control unit...I did, and sure enough, my whole hand was covered in oil when I reached underneath the ABS unit. Called local Audi dealer...and also called Audi of America...dropped car off at dealer...they confirmed that the unit (ABS) had indeed failed. Audi of America denied any help at all with a unit that failed at 13.5K miles!!!!!!! I ended up paying $1,500 to have it fixed.

- Shoreline, WA, USA

ABS warning light began flashing. Diagnosed by dealer as ABS controller unit; price to fix $1287. Have not fixed yet.

- Olympia, WA, USA

Failure of ABS?ECU control module...no ABS brakes, possible loss of control of vehicle. Car has only 50,000 miles.

- Winchester, VA, USA

Out of the blue, with 64,000 miles on the car, the ABS warning light and brake warning light come on, followed by 3 loud beeps. When the beeps stop, the ABS warning light stays on, the brake warning light blinks continually. Since the first incident, this now happens every time I drive the car. Sometimes the lights will go out and stay out for 5-10 minutes, for the whole thing to start over again. When these lights are on, the ABS does not work. I had a panic stop to avoid a deer and the rear wheels locked up. The car skidded but I did not crash. Dealer says that the ABS controller computer must be replaced, at a cost of $1300. This is apparently very common on 2000 S4 and A4 Audi's. I contacted Audi of America, they refuse to fix the problem, denying that it is a safey issue and saying that the car is out of warranty.

- Lafayette, CO, USA

I just had my rotors and pads replaced on all four wheels of my 2000 Audi S4. Less than three weeks after that repair, the ABS computer failed. I don't know if the two incidents are related but I am worried about the failure of the ABS controller at such a young age. Computer parts do not take wear and tear and should be designed for the expected life of the car- not four years like for me. I have read on the internet of many other similar failures and I am concerned of a general safety issue, particularly for such a critical part like an ABS controller.

- San Francisco, CA, USA

ABS ( anitlock brake system ) failure, will cuase brake lock-up and will result in a accident. ABS has not been repaired due to the amount of money that it would take to fix ( $ 1200-1600 ). ABS pump module needs to be replaced. I haved researced than many other Audi owners have the same exact problem.

- San Jose, CA, USA

ABS control module needed to be replaced in 2000 Audi S4 after numerous false dashboard warning light indications were intermittently displayed will driving.

- Ringwood, NJ, USA