Table 1 shows eight common service brakes related problems of the 2000 Audi S4. The number one most common problem is related to the brake antilock control unit/module (nine problems). The second most common problem is related to the brake abs warning light (seven problems).
Driving on the on-ramp, about 40 mph. I was cut off fairly aggressively and had to apply the brakes hard. My brake light lit-up and beeped a few times. My car then began to spin out of control across the freeway (I-40, a major trucking artery). Read details...
I was going down the street and my abs light and brake light came on and beeped 3 times. I got over as soon as I could to make an appointment to go to Audi. I went up there and they said that they have never seen that code before so they just erased the code. Read details...
Communication failure from the abs module, it causes the abs light to stay lit and the brake light flashes, when this happens the abs does not work on the car, it's a very common problem with these units but Audi hasn't done a recall. Read details...