2018 BMW 440i xDrive Service and Repair Manual

This factory service and repair manual for the 2018 BMW 440i xDrive documents one engine, one trim and two bodies: the gasoline 3.0L turbocharged inline-six with twin overhead camshafts, Base specification, in a convertible and a coupe. The result is a book with few branches. Engine and driveline procedures apply to both cars, and a technician only needs to check which body is on the lift when the work moves to the roof, the glass or the harness routing.

Engines covered

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

Body styles covered

• 2-door convertible
• 2-door coupe

Trims covered

• Base

Known issues on the 2018 440i xDrive. Service coverage starts at the engine and works outward. Fuel delivery, ignition, charge-air plumbing, cooling and emissions are each documented with specifications and torque values for the turbocharged six. The xDrive driveline follows, with its own procedures and diagnostics. Then come the chassis sections for brake, steering and suspension work, and the body material, where wiring diagrams and connector views turn an intermittent fault into something that can be measured.