Car wiring diagrams: Bmw E36 Brake Circuit Warning, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Replacing your brake pads is one of the easiest jobs to perform on your BMW. In general, you should inspect your brake pads about every , miles, and replace .This answer is applicable for many BMWs in addition to the one listed below. Q My problem is that the brake light on the dash is always on. I had my local repair .Doing some electrical work on your car, and now all of a sudden, the air bag lamp is on? This lamp is a huge pain now there is an easy way to reset it!.