Question about 2001 Audi S4

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2001 Audi S4 ABS engagement, electronic buzz and shudder

Just bought used S4 in very good condition. Issue when breaking - no matter how hard the breaks are applied - when coming to a complete stop the ABS will engage, pre-emptive electronic buzz and then engagement.

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Your car, like mine, has suffered the usual ABS pump electronics failure.

I have an almost identical car.

There are some great threads on the net on repairing them, however the wires inside it are just shockingly small, hair sized, and not a job for even the best "DIY" solderer.

Replace the electronics module on the side of the ABS pump, it doesn't need the brake pipes loosening or anything. It is easy to swap.

Then your ABS will work as it should.

You will NEED to find a used unit, or have yours repaired though, new ones are rediculously expensive.

Great Car though.

Posted on Sep 06, 2009

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Posted on Jan 02, 2017

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CHECK THE WIRES FROM THE SENSORS FOR BREAKS OR CHAFFING. AN OHM READING OF THE SENSOR SHOULD BE 850-1200 OHMS, AND AND A-C VOLTAGE READING SHOULD BE 100 MV WITH YOU TURNING THE WHEEL BY HAND.

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