2008 BMW M5 Reliability ReportKeepScore 42/100 · top failure points · buy or avoid
Quick Facts · 2008 BMW M5
- Scores 13 points below the strongest nearby year — the 2006 BMW M5 earns a 55.
- The system most likely to surface first: engine (s85 v10) (critical severity).
- Has 2 NHTSA recalls on record — the most notable involves the electrical system:12v/24v/48v battery:cables.
2008 BMW M5: Buy or Avoid?
The 2008 BMW M5 is a visceral, high-performance sedan, but it's an absolute financial gamble for anyone unprepared for its notoriously expensive and frequent mechanical failures. While the driving experience is unparalleled, potential owners must budget tens of thousands for preventative maintenance and inevitable major repairs; otherwise, it's a guaranteed path to financial ruin.
Unless you are a well-heeled enthusiast with substantial funds specifically earmarked for ongoing, significant maintenance and potential catastrophic repairs, the 2008 BMW M5 is simply not a wise purchase. Its incredible performance comes bundled with an almost guaranteed string of financially crippling failures. It…
Best Model Years
No E60 M5 model year stands out as significantly more reliable; all carry inherent design risks. Later production years (2009-2010) might have minor refinements but don't resolve the core powertrain issues.
Years to Avoid
All E60 M5 production years should be approached with extreme caution, particularly earlier models (2006-2007) that may not have received any minor factory updates.
Biggest Strengths
- Exhilarating 5.0L S85 V10 engine performance
- Sophisticated driving dynamics and handling
- Executive sedan comfort with supercar capabilities
2008 BMW M5 — Known Trouble Spots
The systems that tend to fail first on the 2008 BMW M5, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
The S85 V10 is prone to rod bearing wear, which can lead to catastrophic engine failure if not preventatively addressed. VANOS high-pressure line leaks and pump failures are also common, along with throttle actuator failures leading to l…
The 7-speed SMG III transmission's hydraulic pump (often referred to as the 'SMG pump') is a widespread failure point, leaving the car inoperable. Clutch wear is also accelerated by spirited driving and SMG operation.
Various sensor failures (camshaft position, ABS, wheel speed) are common. The iDrive system can experience glitches, module failures, and controller issues, impacting cabin functionality and diagnostics.
2008 BMW M5 Mileage Danger Zones
The mileage windows when the 2008 BMW M5 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Early Warning Zone
At this mileage, the car is still relatively young, but early signs of SMG transmission fluid leaks or minor electrical gremlins might appear. Ensure all factory recalls and service bulletins are addressed.
Critical Pre-Failure Zone
This mileage marks a critical juncture where many of the S85 engine's known weaknesses, such as VANOS issues and throttle actuator failures, begin to manifest. It's also the mileage where preventative rod bearing replacement should be se…
High Risk Intervention Zone
Without extensive preventative maintenance, an M5 at this mileage faces a very high probability of major SMG pump failure and catastrophic rod bearing issues. Comprehensive inspection and major service are imperative.
Rebuilt Components Zone
An M5 reaching this mileage often indicates a history of significant investment. Expect major engine components (rod bearings, VANOS) and transmission components (SMG pump, clutch) to have been replaced or rebuilt, or be on the brink of…
2008 BMW M5 Ownership Cost Outlook
What it typically costs to keep the 2008 BMW M5 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$1,500-3,000 (excluding major repairs)
Moderate Repairs
$1,000-4,000 occasionally, for items like VANOS lines or throttle actuators. Multiple items can hit at once.
How Long Does the 2008 BMW M5 Last?
While lower mileage might seem safer, it only delays the inevitable major services on critical components like rod bearings and the SMG pump. Prioritize a vehicle with documented preventative maintenance over sheer low mileage, as the costs will still be incurred regardless.
What 2008 BMW M5 Owners Actually Say
What Owners Love
- The glorious, naturally aspirated V10 engine sound is addictive and a rare treat.
- Blistering straight-line performance and responsive handling for a large sedan.
- Comfortable and luxurious interior with high-quality materials.
- Surprisingly practical as a four-door sedan for daily use, when it's running.
Common Frustrations
- Astronomical and unpredictable maintenance costs that can quickly drain savings.
- Frequent visits to the repair shop, leading to significant vehicle downtime.
- The SMG transmission can be clunky, jerky, and unreliable in stop-and-go traffic.
- Terrible fuel economy, often single-digit MPG in spirited driving.
Who Should Buy the 2008 BMW M5?
Best For
- Dedicated BMW M enthusiasts with deep pockets and a high tolerance for downtime.
- Individuals seeking an exhilarating weekend car or track toy, not a daily driver.
- Advanced DIY mechanics with specialized S85/SMG knowledge and tools.
Not Ideal For
- Budget-conscious buyers or those relying on the car for daily, reliable transport.
- First-time performance car owners unprepared for severe maintenance demands.
How the 2008 BMW M5 Compares to Rivals
The E60 M5 stands out as particularly challenging in its segment for financial reliability. While competitors have their own expensive quirks, the M5's critical engine and transmission failures are more frequent and devastating, making it a distinctly high-risk proposition.
More Reliable Than
- No direct competitor offers better long-term financial reliability in the 'used performance sedan' category at this price point, as the M5's issues are uniquely severe for its price.
Comparable To
- Audi S6 (C6 generation with V10 engine - also known for expensive carbon buildup and timing chain issues)
- Mercedes-Benz E63 AMG (W211 with M156 engine - known for head bolt and lifter issues)
Safety Recalls on the 2008 BMW M5
2 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
BMW IS RECALLING CERTAIN MODEL YEAR 2004-2010 5-SERIES, MODEL YEAR 2004-2010 6-SERIES, MODEL YEAR 2006-2010 M5, AND MODEL YEAR 2007-2010 M6 VEHICLES. THE INSULATED BULKHEAD CONNECTOR FOR THE POSITIVE BATTERY CABLE MAY HAVE BEEN INCORRECTLY ATTACHED TO THE TRUNK FLOOR PANEL, WHICH CAN LEAD TO A LOOSENING OF THE BOLT CONNECTION. AS IT LOOSENS, AN INCREASE IN ELECTRICAL RESISTANCE AT THIS CABLE CONNECTION IS POSSIBLE AND COULD CAUSE THE CABLE CONNECTION TO OVERHEAT.
EXTERIOR LIGHTING:TAIL LIGHTS
BMW is recalling certain model year 2008 through 2010 528i, 535i, 550i, and M5 passenger cars manufactured from March 1, 2007, through December 31, 2009. Over time, increased resistance at the taillight electrical contact points may cause damage to the ground terminal and housing of the connector resulting in an intermittent or permanent loss of functionality of one or more rear lamp functions (tail, brake, turn-signal, reverse).
What breaks on the 2008 BMW M5?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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BMW M5 — Year-by-Year Comparison
Compare KeepScores across nearby years of the BMW M5. Click any year for its full report.
Competing 2008s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2008 BMW M5
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Frequently Asked Questions
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