2006 BMW 550i Service and Repair Manual

This factory service and repair manual for the 2006 BMW 550i sets out one engine across three trims: the naturally aspirated 4.8L DOHC V8, gasoline, in a four-door sedan sold as Base, Formula 1 and Top. The mechanical package is common to all three, so engine and driveline specifications are read straight. The trims differ in equipment, and it is in the wiring diagrams and body sections that those differences have to be tracked. Procedures, torque values and diagnostics are grouped by system.

Engines covered

• 4.8L V8 — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base
• Formula 1
• Top

Known issues on the 2006 550i. A naturally aspirated V8 in a sedan of this size puts the routine work in predictable places, the valve gear and its oil supply, the cooling circuit, the intake and exhaust path, and the electrical network behind the cabin equipment, and this manual documents each of them. It gives the removal and installation order, the clearances determining what may be reused, and the torque values for reassembly, with wiring diagrams and diagnostic charts that let an electrical fault be followed to its circuit before parts are ordered.