2003 BMW 525i Service and Repair Manual

This factory service and repair manual for the 2003 BMW 525i is written around one engine and two bodies. The engine is the 2.5L inline-six of 152 cubic inches, double overhead cam, naturally aspirated and running on gasoline; the bodies are the four-door sedan and the four-door wagon. Only the Base trim was cataloged, so the differences worth tracing in the book run between sedan and wagon body work rather than between equipment levels.

Engines covered

• 2.5L inline-six (152 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan
• 4-door wagon

Trims covered

• Base

Known issues on the 2003 525i. Coverage runs system by system. The inline-six section carries valve timing, fuel delivery, ignition and cooling procedures with the torque values and clearances that go with them; the driveline section carries the transmission, propeller shaft and rear axle. Steering, suspension and the hydraulic brake system are specified separately, and the wiring diagrams take in the charging and starting circuits, lighting, and the body electrical equipment fitted to both the sedan and the wagon. Diagnostic routines are given for the same systems rather than referred out.