ABS kicks in at low speed - ABS-DSC and brake lights pop on

[woudybee1971]

I have a weird thing going on with my X5 (E53) 3.0i;
ABS system seems to be activated while braking at very low speed (vibrating brake pedal). Also; when slowely accellerating, the left front wheel tends to block, making a hell of a noise (as if someone sticks a bar in my left front wheel). The moment the car speeds up, the problem disappears and the ABS-DSC and brake lights pop up (Yellow color).
At that moment the ABS and DSC are not working.

I read many posts to find similar problems but not really found any.
I read about steering sensors, ABS sensors.

Any experience with this problem?

Thank you all!

[upallnight]

remove the wheel sensors and clean off the metallic particles that are stuck to the tip of the sensors.

[barryb97]

As he said. Wheel speed sensor. I had a similar issue when I replaced a wheel bearing.

[woudybee1971]

Thanks guys!!


I hooked the car up to my laptop and read the wheel sensors.
While driving three sensors have measure the rpm's 1 sensor (front right) shows ZERO.
I cleaned both front sensors and put them back in....same problem.
changed both sensors (from left to right and vice versa) and now the front left shows ZERO.
Conclusion: wheel rotation sensor is dead.

I buy one tomorrow and share results with you

[upallnight]

Originally Posted by woudybee1971

Thanks guys!!


I hooked the car up to my laptop and read the wheel sensors.
While driving three sensors have measure the rpm's 1 sensor (front right) shows ZERO.
I cleaned both front sensors and put them back in....same problem.
changed both sensors (from left to right and vice versa) and now the front left shows ZERO.
Conclusion: wheel rotation sensor is dead.

I buy one tomorrow and share results with you

I would say that a very definitive conclusion to the problem. What type of software are you running?

[woudybee1971]

Problem solved:
Left wheel rotation sensor is replaced and solved the problem!

The software I am using is called INPA