1990 BMW 735iL Service and Repair Manual

This factory service and repair manual for the 1990 BMW 735iL sets out the service data for a four-door sedan with a naturally aspirated 3.5L inline-six under a single overhead camshaft, gasoline-fueled, in Base form. One engine and one body mean the coverage never branches: the torque value, clearance or test given is the one for the car in the bay. Engine, driveline, chassis, body and electrical systems each get their own procedures, specifications, wiring diagrams and diagnostic sequences.

Engines covered

• 3.5L inline-six — SOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 1990 735iL. One recall sits on the federal record for the 1990 735iL. It concerns a brake light switch that can stick, leaving the rear lamps either dark when the driver brakes or lit continuously regardless of pedal position, so following traffic loses the signal that the car is slowing. Owners have recorded one complaint, entered under vehicle speed control. Both point at the same material: the pedal-box and switch procedures, the exterior lighting wiring diagrams, and the circuit tests that show whether a lamp fault lies in the switch, the wiring or the bulb.