2018 BMW i8 Service and Repair Manual

This factory service and repair manual for the 2018 BMW i8 documents an unusual pairing: a 1.5L inline-three, DOHC and turbocharged, working as the gasoline half of a plug-in hybrid driveline in a two-door coupe sold in the single Pure Impulse trim. Because that small engine and the electric side of the system are serviced as one powertrain rather than as two, the procedures, specifications, torque values and wiring diagrams here cross between them constantly, and the diagnostic material is written for the combination instead of for a conventional engine bay.

Engines covered

• 1.5L inline-three plug-in hybrid — DOHC, turbocharged, gasoline

Body styles covered

• 2-door coupe

Trims covered

• Pure Impulse

Known issues on the 2018 i8. What the manual offers is coverage of the systems that make it specific — the turbocharged three-cylinder with its cooling and fuel supply, the high-voltage hybrid components and the safety steps their service demands, the transmission and driveline, brakes, steering, suspension, restraints and body electrical — each with its own procedures, specifications, torque values, wiring diagrams and diagnostic routines.