2008 BMW 120i Service and Repair Manual

This factory service and repair manual for the 2008 BMW 120i is written around two hatchback bodies that share everything mechanical. Whether the car has two doors or four, it carries the same naturally aspirated 2.0L inline-four of 122 cubic inches, with double overhead camshafts and gasoline injection, and it is sold as Base, Dynamic, M Sport or Style. The shells differ in structure, door hardware, glass and rear-body wiring, and those are the sections where the manual separates them; the powertrain and chassis material is shared.

Engines covered

• 2.0L inline-four (122 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 2-door hatchback
• 4-door hatchback

Trims covered

• Base
• Dynamic
• M Sport
• Style

Known issues on the 2008 120i. Coverage is organized by system, which is how the car is actually worked on. The 2.0L four has its own mechanical, fuel, ignition, cooling and emission procedures with full specifications; the gearbox and driveline follow; and brakes, steering and suspension are given with torque values and setting data. Body sections handle both hatchbacks, and the wiring diagrams trace lighting, restraint, locking and instrumentation circuits one at a time, backed by diagnostic routines for the modules that control them.