Topic: Electronics

Guide for Replacing Alternator Output Cable (V12)

Article by: Hairywithit Applies to: BMWs with the M7x V12 engine. Based on 1989/1990 750iL: Symptom: No obvious problems but was discovered by visual inspection. Insulation on the cable was badly cracked and failing at both ends of the cable tube. https://www.shiftoem.com/dev/showparts.php?mospid=47365&typschl=GC83&diagid=11_4607 Description: After nearly 20 years of continuous service […]

OBC Secrets

Article by: Johan Article applies to: all BMW E32 models (with some information for the E34 as well). Versions: There are two different versions of the OBC used in the E32. The OBC III and the OBC IV. The OBC III was used upto 09 1987 and was then replaced […]

Front Electronics Modules

Article by: Johan Article applies to: all e32 and e34 models (some variations may exist). The left side: Picture taken from a 1990 750i. Servotronic: The servotronic control module controls the amount of power assisted steering based on the road speed. The faster you go the stiffer the steering will […]

Rear Electronics Modules

Article by: Johan Applies to: all e32 and e34 models.   Under the rear seat you will find a bunch of modules on the left side. The modules you will find are dependent on the options your car has. You can expect to find the: zentral karosserie electronics (ZKE) or […]

LKM Light Relay Repair

Article by: Max Fretter, updated and edited by Mike Oswald Applies to: all e32 and e34 models. Both e32 and e34 owners either know about these things already, and have had them fixed, or need to know about them – that’s what this page is for. The LKM or “Licht […]