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.
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.
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