Today I replaced the brake sensor cable. Warning light has been on and off for about 4 years, mostly off until recently. With MOT due I thought it was time to do it. I have 2 repair cables in anticipation: a long and a short. The long one is both brake and ABS and the brake cable goes into the cabin to the bottom of the A pillar. When I learnt that needs the dash out then I went for the short one which is just the brake sensor and avoids tampering with the ABS circuit which is more safety critical:
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Note that the A2 brake sensor cables are red and yellow NOT red and brown. This was sold as an Audi VW part 1J0 973 802 and currently cost £9 on the bay. I used crimped heat shrink butt connectors. Took 4 hours, twice what I was expecting.
I took photos so can do a How To . If I were to do this again I would use the long cable and cut it short inside the engine bay. Much easier to work on but it does mean joining 4 wires and not 2, one of which is the ABS. On the otherhand, joining with the short cable means splicing into the brake sensor/ABS cable and making a join inside the wheel arch which is subject to crud.
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