Re: ASR System Failure??....on ma 147.....
If the ESR/ASR Light stays on and doesnt turn off after the car has moved, then you have a faluty sensor. there is a sensor in each wheel which is fixed behind the hub and then a cable runs from it to a connector.
I had a similar fault and it wa smy driver sid erear sensor, i took the wheel off and pushed black sensor out from behind the hub and then disconnected the cable inside the boot where there is a special cut out in the carpet where the connector sits. the connector can be white or black and the length of an index finger.