2022 BMW M340i Service and Repair Manual

This factory service and repair manual for the 2022 BMW M340i is written around a mild-hybrid drivetrain: a turbocharged 3.0L DOHC inline-six on gasoline, electrically assisted, in a four-door sedan sold in Base form only. Because a single powertrain is listed, the specifications do not branch and the wiring diagrams show one set of circuits. Engine mechanical work, fuel and ignition service, cooling and lubrication procedures and control unit diagnostics each occupy their own section.

Engines covered

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

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 2022 M340i. A single recall stands on the federal record for this model year: the audio module's control software can fail to sound the warning that tells a driver to fasten a seat belt, so an unbelted occupant is not alerted as the car is required to alert them. Owner complaints number six and concentrate nowhere in particular, with the electrical system, air bags and suspension each named once. The manual's wiring diagrams and control unit diagnostics cover the modules and circuits behind faults of that kind.