Hi guys,

My Brake pedal is pulsating at low speed. Turn up the volume to hear the brake pedal vibrating. No abs or esp lights on the dashboard and no error codes on the obd reader. Also when I'm driving I get my ESP turning on on low speed and I don't know what is happening. I went before that to mechanic to check my ABS ring from where the sensor reads the speed and etc. and after they have cleaned my ABS ring this issues happens. If anyone had this issue or similar or any suggestions would be highly appreciated.

 

What were the problems before the cleaning?
What were the problems after the cleaning?
Does the pulsating vary with speed, or always the same frequency?
Did you intend to attach a video?

 

the car like that.

 

Before that I had issues with the steering wheel was to hard and I had all those ABS BAS AND ESP checks on the dashboard. I wen to several mechanics and all of them are seeing left rare speed sensor. I changed the sensor but the issues still persist and I went to another guy where he tried to clean out the ABS ring from where the sensor reads the speed and once I took my car the heavy steering wheel fade away but then the pedal started pulsating all the time doesn't matter the speed and the ESP turn on as well doesn't matter at what speed I'm and basically I cannot drive the car like that.

 

The ABS ring is probably rusted away to nothing. Just replace it instead of trying to clean it and it will probably be sorted.

 

Thank you I will try that as well but the issue was that all mechanics says they dont see any issues with the RING and thats why they try to clean it instead of replace it . Another questions do you know if the RING I can buy it separate I mean the ring only for the ABS?

 

If that is the case, why do they suggest cleaning a ring that looks perfect?

I would get the 4 wheel speeds data logged and drive the car at slow speeds and see if there is a consistent error in the speeds reported. If so its likey to be a mechanic issue with the ring. If not, then its possibly an issue with the ABS ECU etc.

 

This is what the mechanic tomorrow will do live with the STAR to drive the car and see what data each wheel is giving as they said is not an electrical problem as when then delete the fault from the dashboard before everything seems okay on the dashboard and when I start driving when I'm on first gear its okay once the car get to second then the ABS lights all come on and the wheel is getting heavy. I didn't understand do this RING is separate part or is a part going with the whole rotor?

 

The ring is on the driveshaft, I am not 100% sure whether its separately replaceable.

 

Thank you I will update the if that manage to resolve the issue thank you for your assistance!

 

I have just checked, they appear to be seperately available - rear part number A2303570182

Front axle they are part of the seal - A0259971647 (at least for my 221.179)

No problem!