2021 BMW 840i Service and Repair Manual

This factory service and repair manual for the 2021 BMW 840i concerns one engine and two bodies: a twin-cam, turbocharged 3.0L inline-six on gasoline, in a two-door convertible and a two-door coupe, both Base. Nothing in the powertrain material has to be qualified by version, so a technician reads the engine, transmission and driveline procedures once. Where the two cars part company, in roof structure, glass, seals and their circuits, the body sections give each its own steps and torque values.

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 2021 840i. The manual covers scheduled service and repair in detail, with cooling and lubrication specifications for the turbocharged six, timing and valvetrain data, charge-air and fuel-system checks, transmission and driveline procedures, brake and suspension figures for the chassis, and the wiring diagrams and connector views behind the coupe's and convertible's body electrics.