2009 BMW M6

2009 BMW M6

Overview

The 2009 BMW M6, a high-performance grand tourer, is known for its exhilarating driving dynamics and powerful V10 engine. While generally a robust vehicle, like any complex machine, it has certain areas that have seen more attention from owners regarding reliability. This analysis focuses on documented common issues beyond routine maintenance, providing insights into potential concerns for prospective or current owners. The M6’s advanced engineering means that some repairs can be costly, emphasizing the importance of understanding its specific reliability profile.

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Engine

5.0L V10 S85

Rod Bearing Failure

• Symptoms: Knocking or rattling noise from the engine, loss of oil pressure, potential engine seizure.
• Solution: Replacement of rod bearings, often with upgraded aftermarket bearings. In severe cases, engine rebuild or replacement may be necessary.
• Cost: $2,500 - $6,000+

Oil Consumption

• Symptoms: Frequent need to top up engine oil, blue smoke from exhaust under acceleration.
• Solution: Inspection for oil leaks, potential valve stem seal replacement, piston ring issues, or PCV system problems.
• Cost: $500 - $2,500+

Throttle Actuator Failure

• Symptoms: Check engine light, limp mode, rough idling, inconsistent throttle response.
• Solution: Replacement of individual throttle actuators or the entire bank.
• Cost: $800 - $1,500

Transmission

7-Speed SMG III (Sequential Manual Gearbox)

Hydraulic Pump Failure

• Symptoms: Difficulty shifting gears, transmission warning lights, inability to engage gears.
• Solution: Replacement of the hydraulic pump and fluid.
• Cost: $1,500 - $3,000

Clutch Actuator Issues

• Symptoms: Jerky shifting, clutch engagement problems, transmission error messages.
• Solution: Adjustment or replacement of the clutch actuator.
• Cost: $1,000 - $2,000

6-Speed Manual

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: N/A

Suspension

Adaptive M Suspension

Electronic Damper Control Failure

• Symptoms: Harsh ride, clunking noises, suspension warning lights.
• Solution: Replacement of faulty electronic dampers.
• Cost: $500 - $1,200 per corner

Electrical

General Electrical System

iDrive System Glitches

• Symptoms: Screen freezing, unresponsive controls, navigation errors.
• Solution: Software updates, module reset, or replacement of the iDrive controller or head unit.
• Cost: $300 - $1,500

Window Regulator Failure

• Symptoms: Power windows not operating, slow window movement, grinding noises.
• Solution: Replacement of the window regulator mechanism.
• Cost: $300 - $600 per window

Exterior

Body Panels and Trim

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: N/A

Interior

Interior Trim and Upholstery

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: N/A

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Summary Verdict

The 2009 BMW M6 is a performance icon with a powerful V10 engine and engaging driving experience. However, potential buyers should be aware of specific reliability concerns, particularly regarding the S85 V10 engine’s rod bearings and oil consumption, as well as potential issues with the SMG III transmission’s hydraulic system. Electrical gremlins and suspension component failures are also noted. While the manual transmission and other systems are generally more robust, the high-performance nature of the M6 means that repairs can be expensive. Thorough pre-purchase inspection and a history of diligent maintenance are crucial for ownership.