This BMW 3 Series repair manual contains in-depth maintenance, service and repair information for BMW 3 Series models built on the E90, E91, E92 or E93 platforms from 2006 to 2011*. 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.

This manual covers the 2012 BMW 3 Series Coupe (E92) and the 2012 BMW 3 Series Convertible (E93). The E92 and E93 models were extended through the 2012 model year.

• N52 engine: 325i, 325xi, 330i, 330xi (2006)
• N52KP engine 328i, 328xi (2007-2011)
• N51(SULEV) engine: 328i, 328xi (2007-2011)

• N54 engine: 335i, 335xi (2009 - 2010), 335is (2011)
• N55 engine: 335i, 335xi (2011)

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• Maintenance procedures from changing the ATF to replacing the cabin microfilter. This manual tells you what to do and how and when to do it.
• Step-by-step variable camshaft timing (VANOS) service.
• Cylinder head cover gasket and crankshaft seal replacement.
• Cooling system and radiator service.
• Fuel injection and ignition system diagrams and explanations.
• Information about advanced technical features such as Valvetronic, xDrive, twin turbo boost 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.