2006 BMW 550i
2006 BMW 550i
Overview
The 2006 BMW 550i, part of the E60 generation, is a luxury executive sedan known for its potent V8 engine and engaging driving dynamics. While generally well-regarded for its performance and comfort, like any vehicle of this age and complexity, it has specific areas that have shown a propensity for issues. Owners often praise its powerful engine and refined interior, but potential buyers should be aware of common electronic glitches and potential maintenance costs associated with its advanced systems. This data focuses on documented, non-wear-and-tear related reliability concerns.
Engine
4.8L V8 (N62B48)
Valve Stem Seals
- Symptoms: Blue smoke from exhaust, especially on startup or deceleration; oil consumption.
- Solution: Replacement of valve stem seals.
- Cost: $2,500 - $4,000
Oil Pan Gasket Leak
- Symptoms: Oil leaks visible from the bottom of the engine.
- Solution: Replacement of the oil pan gasket.
- Cost: $800 - $1,500
Cooling System Leaks (Hoses, Radiator, Water Pump)
- Symptoms: Overheating, coolant loss, visible leaks.
- Solution: Replacement of leaking components.
- Cost: $700 - $1,800
Transmission
6-Speed Automatic (GM 6L45/6L50)
Transmission Fluid Leaks
- Symptoms: Rough shifting, slipping gears, transmission warning lights.
- Solution: Repair or replacement of seals and gaskets, fluid flush.
- Cost: $1,000 - $2,500
Mechatronic Unit Failure
- Symptoms: Erratic shifting, inability to select gears, transmission fault codes.
- Solution: Repair or replacement of the mechatronic unit.
- Cost: $1,500 - $3,000
Suspension
Standard Chassis
No Major Issues
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: No widespread issues reported.
Electrical
General Electrical System
iDrive System Glitches
- Symptoms: Screen freezing, unresponsiveness, navigation issues.
- Solution: Software updates, module reset, or replacement.
- Cost: $300 - $1,200
Window Regulator Failure
- Symptoms: Power windows not operating, slow operation, grinding noises.
- Solution: Replacement of window regulator assembly.
- Cost: $300 - $600
Headlight Ballast Failure
- Symptoms: Xenon headlights not turning on or flickering.
- Solution: Replacement of headlight ballast.
- Cost: $400 - $800
Exterior
Body and Trim
No Major Issues
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: No widespread issues reported.
Interior
Cabin Components
No Major Issues
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: No widespread issues reported.
Summary Verdict
The 2006 BMW 550i offers a compelling blend of performance and luxury, but its advanced engineering comes with potential reliability considerations. The 4.8L V8 engine, while powerful, is prone to issues like valve stem seal wear and cooling system leaks, which can be costly to repair. The automatic transmission can also develop leaks or mechatronic unit problems. Electrically, the iDrive system and components like window regulators and headlight ballasts are known to fail. While the suspension, exterior, and interior are generally robust, owners should budget for potential repairs, particularly concerning the powertrain and electronics, to maintain this sophisticated vehicle.