2018 BMW 740i Service and Repair Manual

This factory service and repair manual for the 2018 BMW 740i covers a car built around one powerplant and one body: a turbocharged 3.0L inline-six with double overhead camshafts, burning gasoline, carried in a four-door sedan offered in Base and Excellence form. With a single engine in play, the fuel, ignition, cooling and emissions procedures apply straight to the car on the lift, and the specifications, torque values, wiring diagrams and diagnostics carry on through the driveline, chassis and body electrical sections that both trims share.

Engines covered

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

Body styles covered

• 4-door sedan

Trims covered

• Base
• Excellence

Known issues on the 2018 740i. Service work on this sedan concentrates on the systems the manual names. A forced-induction inline-six brings its own set of checks — charge-air plumbing, direct injection, the cooling circuit that has to hold temperature under boost — and the procedures give clearances, torque values and diagnostic routines for each of them. Away from the engine bay, the transmission and driveline chapters, the suspension and brake work, and the wiring diagrams for the body electrics let a technician follow a fault on either trim from the symptom back to the circuit or component behind it.