This Bentley Publishers service manual contains in-depth maintenance, service and repair information for the BMW X3 from 2004 to 2010. The aim throughout has been simplicity and clarity, with practical explanations, step-by-step procedures and accurate specifications. Whether you're a professional or a do-it-yourself BMW owner, this manual helps you understand, care for and repair your BMW.

• M54 engine: 2.5i, 3.0i (2004-2006)
• N52 engine: 3.0si, xDrive 30i (2007-2010)
• ZF GS6-37BZ Manual Transmission (6-Speed)
• GM A5S390R Automatic Transmission (5-Speed)
• GM GA6L45R Automatic Transmission (6-Speed)

• Maintenance procedures from changing the xDrive fluids to replacing the cabin microfilter. This manual tells you what to do and how and when to do it.
• Manual and automatic transmission fluid service, front and rear differential service, including xDrive transfer case troubleshooting.
• Step-by-step variable camshaft timing (VANOS) service.
• Cylinder head cover gasket and crankshaft seal replacement.
• Cooling system, thermostat and radiator service, including system bleeding using the electric coolant pump on N52 engines.
• Fuel injection and ignition system diagrams and explanations.
• Information on advanced technical features such as VANOS, Valvetronic, xDrive, and DSC (dynamic stability control).
• Suspension repair procedures.
• Brakes, steering and ABS troubleshooting and repair.
• Heating and air-conditioning repair, including A/C component replacement.
• Body and hood repairs and adjustments.
• Electrical system service, with an easy-to-use illustrated component locator section.
• Comprehensive wiring schematics, including fuses and grounds.
• BMW OBD II diagnostic trouble codes, SAE-defined OBD II P-codes, as well as basic scan tool operation.
• BMW factory tolerances, wear limits, adjustments and tightening torques.