The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.Google+
Car Problem Reports
Audi A6 Quattro ABS Light Due to ABS Control Module Failure
Audi A6 Quattro Problem
Average Mileage: 104,859 mi (31,000 mi - 195,000 mi)
Visitor, 2005 Audi A6 Quattro, 80,000 mi
ABS, parking brake, brake & tail light warnings intermitently at first, now constantly. Dealer quoted $2500 to "start" repairs by replacing the ABS module, then see what error remain. In essence they told me they will start replacing parts one at a time until the problem goes away! First and last Audi I will ever buy.
Visitor, 2005 Audi A6 Quattro, 115,000 mi
I bought the 2005 Audi A6 used, as soon as I left the lot about 1mile I got parking brake fault message with abs message. still comes on every time I drive the car. Have not had it repaired yet.
Update 6-12-2014, Just had my ABS Control Module serviced from a independent repair person that did find a fault in the Module I reinstalled it and not had a problem since, (it has been only 1 day so far but way happy that I don't get that beep or message anymore) . Cost about $200 for the fix and about 1/2hr total time to remove and replace, Dealer wanted over 2k.
Visitor, 2005 Audi A6 Quattro, 100,000 mi
Bought my car used and it had ABS/parking break fault. they cleared the codes and it came back. every time i get in my car the faults come up and beep while i drive. Audi dealership wants $2000 to replace the ABS system but i dont think that is the problem. I think it all has something to do with the EMC. Have not fixed the problem yet
Visitor, 2005 Audi A6 Quattro, 103,250 mi
Started having intermittent ABS Brake and Brake (Blinking) and Sound from time to time.
Had car into Audi they said the Brake Fluid was low. Problem went away. Problem back went
back to Audi they said there is a leak in the Vacuum Module that needs to be replaced and
a few other items. $850.00. Now, still have the Brake (Blinking), sound, and ABS light then
Check Engine Light on. Took to Audi they said the ECM module needs to be replaced $1,700.
Before I got it off the lot the lights back on. Now they say it was to do with the ABS brake
Visitor, 2001 Audi A6 Quattro, 125,839 mi
ABS light on Brake light blinking. This does not happen every time I start car but does come on later while driving
Have not repaired yet
ABS light has been flashing since I purchased the car about a 1 1/2 years ago. Didn't bother fixing it though.
Visitor, 2001 Audi A6 Quattro, 143,021 mi
ESP and Abs light come on
Visitor, 2005 Audi A6 Quattro, 31,000 mi
ABS Lights go on red brake light go on..after short stop every time I start driving there is a warning beeping sound....Dealer says ABS module has to be replaced cost $ 2,900.00. Car is my sisters she drives it couple of blocks every day no heavy use at all, millege only 31,000. Now the car is not able to pass state inspection!
Visitor, 2000 Audi A6 Quattro, 89,000 mi
Purchased year 2000 Audi Quattro A6 in Feb 2013. ABS Light was coming on when purchased. At first it would come on as the engine warmed up. Now in the heat of the summer it comes on at startup. Was told it would cost $800 to replace. Have not fixed.
Visitor, 1999 Audi A6 Quattro, 195,000 mi
ABS computer failed at 130000