Was meaning to post this at some stage but didn't get around to it until now....

A few months ago the yellow warning abs light came on on my '98 A4. I took the car to an audi dealership and they told me that I had a faulty ECU (apparently quite a common fault). I was quoted 850 excl. VAT and labour for a new ABS pump and ECU (audi only sell the whole unit). [img]/ubbthreads/images/graemlins/cry.gif[/img] [img]/ubbthreads/images/graemlins/cry.gif[/img] As you can imagine this was a bit of a shock. [img]/ubbthreads/images/graemlins/blush.gif[/img]

I decided to take my car to an Audi specialist (non dealer) to see if they could do any better. They first thought that it was a wheel sensor but after running the diagnostic they said it was indeed a faulty ECU. As they were BOSCH dealers they said that they could get their hands on a new ECU for 450 excl. VAT plus 150 for labour. Still a bit steep for me [img]/ubbthreads/images/graemlins/cry.gif[/img] The guy also told me that my car would not pass its MOT unless it was fixed (not good)

I did a search on the net for other people who have had this problem and found that changing the ECU is not that big a deal. In actual fact the ECU just slides out from the pump. So I managed to buy a second hand ECU for 150 with a one month warranty. Taking off the old ECU was a bit rtricky without taking out the windscreen washer fluid holder (it can be done with a bit of dexterity) In all it took about an hour to take off the old ECU and put on the new one. I was very relieved to when the ABS warning light went off when I turned on the key. The car has since passed it's MOT and yes the ABS does work! [img]/ubbthreads/images/graemlins/laugh.gif[/img]

Sorry for the long post but it might come in handy for someone else with the same problem.

All The Best,
Diarmuid [img]/ubbthreads/images/graemlins/beerchug.gif[/img]