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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2001 Audi A6 error codes 1127, 1129, 1136, 1138


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The hard shifting is the kicker though - that points me straight at the MAF sensor. My bad MAF on my S8 gave me that exact symptom, with a very hard shift 1-2 under full throttle.
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As I slow to a stop the ABS kicks on in my 2000 Audi s4


sounds like you got either a misreading(bad wheel speed sensor/abs sensor)
or a dirty sensor
or a broken reluctor ring on the axle
prematurely setting the abs to come on for no reason when your almost at a stop,,,,
i would take it to the shop,but its gonna be one of them things

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Just had breaks/rotors replaced. Car is still shuddering when breaking at times. Service light came on for traction service/anti lock breaks.Traction off light on. Any ideas? Did they actually replace my...


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I had the same problem. the jerking breaking and pulling to one side, but if u are going over 70 miles and that happens to you, you better start praying cause it will **** so hard that its hard to control. the yaw rate sensor (prox $400 on line) needs to be replace and adjustment (i beleave only the dealer can adjust). What I did to solve the problem is to eliminate the sensor ($0 cost). now my SUV drives and handle just like a regular truck without traction control. Toyota is not helping on this matter and dealers just dont care. I will not put my family thru the same scarry ride. My solution eliminate the sensor, the light is on @ all time but in return a smooth ride. Im not telling you to do what I did, but Im telling you it is the Yaw Rate Sensor. Good luck.

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1 Answer

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It may be a calibration issue. The sensor doesn't know what is considered slow or stop., Yes,your right, a computer thing.

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1 Answer

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YOU NEED A SCANNER TO MONITOR THE WHEEL SPEED SENSORS. THE ABS IS SENSING A SKID AND THE ABS IS ACTIVATED WHEN THIS HAPPENS. THERE MAY BE A CODE FOR THE HUB THAT IS CAUSING THE ABS TO ACTIVATE.

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.

RATE ME, PLEASE




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Get new pads, ceramic and if you get the BEST ones, the will replace them FREE, forever ;-)
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Hi Tino75,
I suggest that your vehicle needs to be taken for an electronic scan....Your problem may be to do with the ABS pump or a loose wheel bearing...please let us have more imfo
Regards
Johngee10

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