Six problems related to brake light on have been reported for the 1998 Audi A4. The most recently reported issues are listed below.
The amber abs warning light glows while the red brake light blinks. I understand newer Audi models have just been recalled for abs issues, but my 1998 A4 was not included in the recall. Braking appears normal, and warning light illumination is sporadic.
Out of nowhere, abs light on, brake light flashing. Took to shop, they stated this is a common problem for the abs module to lock out communications; 1400 + for the repair. This is an expensive car; I find it outrageous the electronic module is outside, subject to weather conditions and salt. Please see my complaint on coil springs as well. Researched the problem on the internet and it seems this is usual and customary for this model, I feel NHTSA needs to step up here and call Audi on the table.
The abs control unit on my Audi A4 failed after 95,000 miles. I have no anti-lock braking and Audi has denied any responsibility for the part since it is out of warranty. Searching through Audi forums I found this failure to be very common and everyone had no abs until the control unit was replaced which cost an average of $1500+. There were no events that lead up to the failure, I started the car one day and the abs and brake light started flashing on my dash. I tested the abs and found that it indeed does not prevent my brakes from locking up. Nearly three years later, the part has not been fixed due to the high cost to repair it.
Abs system failure. Abs dash light flashes and brake light remains lit. Abs system not functional. Standard hydraulic brakes remain functional without abs safety feature.
Dt: the contact owns a 1998 Audi A4. The abs light came on and the brake light flashed intermittently while driving. The brake light has been on for the past two days.
Abs light and brake light came on while driving. Pulled over and checked owner's manual which indicated loss of abs, but full conventional brake power. Blinking lights went off by themselves after few minutes. Since the warning, I am experiencing slight resistance from brake pedal occasionally. Judging by postings on Audi world. Com, this has happened to several people. Waiting to get appointment for diagnostics and part replacement if necessary.