2009 BMW 135i Service and Repair Manual

This factory service and repair manual for the 2009 BMW 135i covers four bodies on one engine. The turbocharged 3.0L DOHC inline-six is common to all of them; the shells run from a two-door convertible through four-door and two-door hatchbacks to a two-door coupe, every one in Base trim. Powertrain and chassis procedures are read once and applied across the range, while the body, glass, roof and latch work — and the wiring that follows each shell — is where the four cars part company.

Engines covered

• 3.0L inline-six — DOHC, turbocharged, gasoline

Body styles covered

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

Trims covered

• Base

Known issues on the 2009 135i. Complaints for this model year total 79. Air bags account for 19, with exterior lighting and the fuel system tied at 14 apiece. Lighting trouble on a car with this many body variants usually comes down to circuits and connections rather than lamps, which is where the wiring diagrams earn their keep; the fuel entries point toward supply pressure and injection on a turbocharged engine; and the restraint chapters cover module service and the codes behind a lit warning. All three are diagnosable from what is given here.