2021 BMW M240i Service and Repair Manual

This factory service and repair manual for the 2021 BMW M240i covers a two-door convertible and a two-door coupe, cataloged as Base, Convertible and Coupe trims, with a single turbocharged 3.0L DOHC inline-six on gasoline doing the work in each. The practical consequence for a technician is that engine, transmission, driveline and chassis diagnostics never need a variant check, while body, roof and interior electrical procedures do. The manual is arranged so that split is visible at the section level rather than buried in footnotes.

Engines covered

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

Body styles covered

• 2-door convertible
• 2-door coupe

Trims covered

• Base
• Convertible
• Coupe

Known issues on the 2021 M240i. What the manual documents is the full service life of that hardware: removal, installation and reassembly of the inline-six with its clearances and tightening sequences, turbocharger and charge-air service, cooling and lubrication specifications, and the fuel and ignition diagnostics used to trace a rough-running condition to its cause. Driveline procedures follow, then suspension, steering and brake specifications for both bodies. Body electrical work — lighting, climate, closures and the roof circuits on the convertible — comes with wiring diagrams that show each circuit in full.