Nine problems related to brake antilock control unit/module have been reported for the 2000 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Audi A4 based on all problems reported for the 2000 A4.
Antilock braking system failing at 80k miles. Increasing the risk for rear brakes to lock up the wheels possibly causing vehicle to spin out under heavy braking.
Earlier model Audi A4 autos have a very common problem related to the failure of the abs control module. Failure to repair immediately at a cost of up to $3000 (if Audi can find parts) will result in rear wheel lockup and potential loss of vehicle control. Audi warns/admits of this in its owners manual.
Abs control module failure. Searched forums and info boards and it's a very common problem.
I experienced failure of abs in a 2000 Audi A4 avant quattro. This is the well-known and widely reported problem with the bosch 5. 3 abs control module unit. The unit spontaneously failed without any reason, at about 80k miles. The consequences are the abs does not work and the part to replace it is about $1500. I have yet to replace or repair it at this point, hoping vw/Audi will do something about it (a recall would be nice).
Abs module failing and or loosing communication.
Abs light is on, and brake light is blinking. I took the car to the dealer and I was told my abs module is faulty. After looking at the forums online it seems that this is a defect that thousands of Audi/vw owners are getting. Cost of repair is very high. Why isn't there a recall yet???.
Audi A4 2000, faulty abs module.
Abs module/sensor failure. This problem occurs frequently with other Audi owners and has been thoroughly documented on sites such as mycarstats. Com. Basically the abs and brake lights would come on while driving, accompanied by a beep. After initial research, I was able to confirm the module had failed and would require replacement. Local Audi dealer quoted 1500 for the module plus labor. Luckily, I found an alternative by sending the faulty module to modulemaster. Com. This company specializes in repairing defektive circuitry. The labor is warrantied for the life of the vehicle and costs 300. 00 (including shipping and misc. Stuff). The car was still driveable while the module was out. Their website contained a video on how to properly access the module, remove it, and replace it once it was repaired. All in all, I saved myself '1200 plus labor'. I would like express my disgust with all Audi dealers who sell their modules for these outrageous prices. One thing none of them admitt to is that the reason why these bosch modules fail is because of a known defekt in the circuitry. So their $1200 modules will eventually fail too.
Abs and brake lights on the instrument panel came on and went off intermittently, along with beeping alerts. Dealer determined that the abs control module failed. The vehicle was no longer under warranty.