Need a replacement ABS module

[Maxrs6]

Thanks for sharing. £5.00 repair solution for a 21 year old rs6 is definitely on the cards

[ALE-RS6]

Hi ALE RS6

Would you be able to update how this went ? It looks like I’m in exactly the same situation, about to send my abs unit same part no as yours to Ecu testing, after already had it tested at Actronics who passed it but the 39 fault code still kicks in and dash lights up.

Did you resolve yours ? Are you considering a remanufscured part - which I understand needs recoding if it’s not the original one in the car ?

I’d be very grateful for any help and will keep posting on this thread my own findings.

Max

Hi Max,

I'd recommend sending it to ECU testing and see what they say. They said mine had been previously fixed and was beyond repair. I managed to source a second hand one on eBay which was tested and working. My local garage installed the replacement and had it coded to the car. This seemed to do the trick and the fault codes disappeared. Not sure what the 39 code is, but the garage also tried replacing the brake pressure sensor first before they sent the ABS module away for testing.

[Maxrs6]

Hi all - does anyone have any other ideas for this problem and module fault. Ecu have tested my module twice under every condition and can’t fault it … but in the car fault light and code on VCDS. Is this the end for these cars or can anyone suggest a re code / muddle through option ? Advice / sympathy welcome

[Shoppinit]

What is the exact issue you are having?

[Maxrs6]

Hi Shoppinit, thanks for asking.

The car drives and stops absolutley fine on start up but after 2-5 minutes of driving the ABS warning light comes on and buzzer sounds. The fault code that's registering on VCDS is a 00301 ABS Return flow pump (v39) 35-00--. The other two fault codes are 01119 Gear recognition signal and a 18256 DTC Memory of engine controller. We (SJB Autotech in Basingstoke) and myself have assumed the latter two arent related but maybe they are - we're investigating those now too.
We ve checked fuses and wiring and had the ABS module tested and passed 3 times ( 2 x by ECU testing, the latest by their advanced dept who re tested under 'warm' conditions).

The car is a late 54 plate on 52,000 miles. It was stage 1 mapped by MRC in 2011 ( @ 22,000 miles).
Im the second owner from new, bought in 2011 at 21,000 miles.
It was dry stored ( but run) for 7 years - 2017-2024 then fully serviced on on the road in Feb 2024.

Ive been bringing back to show condition, headliner, Original DRC, Brakes, etc so Im now at a cross roads and would really appreciate any advice.

You seem to know these cars inside out - what would you suggest ?

Max

[Shoppinit]

I suspect the fault is not with the controller itself, which is what the pros are testing and finding not faulty. THere possibly is a genuine problem with the hydraulic pump and the controller is correctly reporting a fault.

I think I would attempt to find a second hand abs unit (controller and pump block / manifold and swap the controller from yours to that to see what happens. You might even be able to pick up a very cheap ABS unit if it's got as faulty controller (typically reporting wheel sensor faults incorrectly). You can discard that bit anyway.