2020 BMW M4 Service and Repair Manual

This factory service and repair manual for the 2020 BMW M4 is organized around one engine and two body styles, with Base and CS trims layered over them. The engine is a turbocharged 3.0-liter inline-six with double overhead camshafts on gasoline, and it is the part of the car the manual specifies most tightly: fuel pressures, cooling capacities, fastener torques and the diagnostic routines that read the management system. Coupe and convertible then part company in the body, glass and trim procedures.

Engines covered

• 3.0L inline-six — DOHC, turbocharged, gasoline

Body styles covered

• 2-door coupe
• 2-door convertible

Trims covered

• Base
• CS

Known issues on the 2020 M4. Two recalls are recorded. One covers driver and passenger knee air bags that may have been folded and packed incorrectly, so the bag may not open the way it was designed to in a crash. The other is a fuel system fault: injectors built without their damping piece let vibration work on the joint between the fuel line and the rail until that connection is damaged, and a leak there near an ignition source can start a fire. A single suspension complaint is on record. Injector removal and fuel line torque values are covered here.