2011 BMW 125i Service and Repair Manual

This factory service and repair manual for the 2011 BMW 125i has three engines to keep straight: a turbocharged 1.6L inline-four of 98 cubic inches, a naturally aspirated 2.0L inline-four of 122 cubic inches, and a naturally aspirated 3.0L inline-six of 183 cubic inches. They appear in three bodies — a four-door hatchback, a two-door coupe and a two-door hatchback — all in Base trim. With that many combinations, confirming which engine and which shell a car actually has matters before any specification is read off the page.

Engines covered

• 1.6L inline-four (98 cu in) — DOHC, turbocharged, gasoline
• 2.0L inline-four (122 cu in) — DOHC, naturally aspirated, gasoline
• 3.0L inline-six (183 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door hatchback
• 2-door coupe
• 2-door hatchback

Trims covered

• Base

Known issues on the 2011 125i. The spread of engines is what shapes the work here. Each has its own compression figures, timing drive, cooling layout and torque sequences, and the turbocharged four adds boost control and charge-air plumbing that the naturally aspirated engines do not have. The manual keeps those procedures separate rather than averaged together, then carries on through transmission and driveline, suspension and steering geometry, brake hydraulics and stability control, restraints and the body electrical of all three shells, with wiring diagrams and diagnostic charts throughout.