2018 BMW 440i Service and Repair Manual

This factory service and repair manual for the 2018 BMW 440i settles on two bodies, a two-door convertible and a two-door coupe, offered in Base and M Sport trim with the same turbocharged 3.0L inline-six, double overhead cams, on gasoline. One engine across two shells means the engine and driveline material is written once and applies to both, and the differences that matter to a technician show up in the body sections and the wiring that runs through them.

Engines covered

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

Body styles covered

• 2-door convertible
• 2-door coupe

Trims covered

• Base
• M Sport

Known issues on the 2018 440i. The turbocharged six carries most of the service load, and it is documented from fuel and ignition through charge air, cooling and emissions with specifications and torque values throughout. Transmission and driveline work has its own procedures and fault diagnosis. The chassis sections cover brakes, steering and suspension, and the body material handles the convertible's roof separately from the coupe, with wiring diagrams that let a circuit be traced through either shell.