2018 BMW 340i xDrive Service and Repair Manual

This factory service and repair manual for the 2018 BMW 340i xDrive is built on one engine and one body: a turbocharged 3.0L DOHC inline-six on gasoline in a four-door sedan, offered in a single Base trim. The manual is arranged so a job can be found by the system it belongs to rather than by the symptom that started it — engine mechanical, fuel and ignition, cooling, driveline, brakes, steering, suspension, body, electrical — and each section brings the procedures, measured specifications, tightening figures, wiring diagrams and test sequences that job calls for.

Engines covered

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

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 2018 340i xDrive. Servicing this car means working around a turbocharged inline-six and the all-wheel-drive hardware behind it, and both are documented at procedure level: valve timing and valvetrain specifications, cooling and lubrication requirements, turbocharger and charge-air work, transmission and driveline removal and installation, and the torque figures each of them calls for. The chassis chapters cover the brakes, steering and suspension, and the body electrical chapters supply the wiring diagrams and test routines used to trace faults.