1988 BMW M3 Service and Repair Manual

This factory service and repair manual for the 1988 BMW M3 addresses a coupe built around a single powerplant: a 2.3L inline-four with double overhead cams, no forced induction, running on gasoline. One body style and one trim level means one set of clearances and torque values to work from. The specifications, wiring diagrams and diagnostic routines follow the car system by system, so cooling work, fuel and ignition work, and body electrical work each sit in their own section rather than being folded into a general chapter.

Engines covered

• 2.3L inline-four — DOHC, naturally aspirated, gasoline

Body styles covered

• 2-door coupe

Trims covered

• Base

Known issues on the 1988 M3. One recall stands on the federal record for this year, and it concerns heat. When a cooling system part stops doing its job, coolant temperature and pressure climb far enough that a hose can leak, a radiator or expansion tank can weep, a hose can part from its fitting, or the heater core end piece can crack and expel hot coolant into the cabin. Both owner complaints logged for this car fall under engine and engine cooling. The cooling system pressure tests, thermostat and water pump procedures and heater core service steps here address exactly that chain.