Do some searches on here or on bimmerforums.com. There are a lot of different things that can cause an ABS issue.
You can jump two pins on the abs relay, 87 and 30 I believe, and it will cause the ABS pump to cycle. I'm fairly certain if you do that an you hear the pump cycle it is probably a relay problem. If you perform that diagnostic and the pump will not cycle the circuit board on the ABS pump is probably broken. This is a somewhat common e36 problem.
A certified mechanic should be able to diagnose and determine exactly what the problem is without just throwing parts at it. You can try replacing the relays, but they may not be the problem. My car shows a relay problem, but it is really the circuit board on the ABS pump that is the problem. |