BMW E30 3-series ABS System Relays – 318i, 318is, 318ic, 325e, 325es, 325i, 325is, 325ic, 325ix, M3
I purchased an ABS relay from Bavarian Auto for my 1989 325ic and am having a problem locating the relay. I know it is located left of the steering column, but so far cannot locate. Is it best to remove the ECU module to get better access to the relay.
The ABS system on the E30 chassis models (3-series 84-91) has three relays.
* The over-voltage protection relay is in the circuit between the ignition switch and the ABS control unit.
* The pump and valve control relays are located on the pump assembly, under the black plastic cover.
If it’s the over-voltage protection relay that you are replacing, this is mounted above the ABS control unit, under the dash, to the left of the steering column. See the diagram below (sorry for the poor quality). This is showing the relay just above the ABS control unit.