Brakes - ABS Will Activate Even Though Traction Is Good
89BMW01Group 34 Brakes
Bulletin Number 34 06 88 (1784) Page 1 of 1
Woodcliff Lake, NJ Technical Dept. February 1989
SUBJECT: Troubleshooting ABS System
MODELS: 3 Series
Situation: Some 3 Series vehicles may experience a situation in which, during braking, the ABS will activate even though the brake application is light and traction is good.
This may be caused by the pulse ring being loose on either front wheel hub, which allows the pulse ring to rotate, sending a false input to the ABS control unit.
If this condition is found, replace the front wheel hub with the loose ring.
Warranty Covered under the terms of the BMW 3 Year/36,000 Mile New Car Limited
Status: Warranty.
Defect code: 31 21 03 12 00