BMW M6 (2008)
Running costs, reliability data, and common problems from 57 real MOT tests.
Annual Cost
£2,757
£230/month
MOT Pass Rate
89%
Good
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
4999cc Petrol
Solid Option
89% pass rate, £2757/year to run. 7 points above average.
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Annual Running Costs
~30 mpg
Based on 4999cc
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Good reliability. Occasional issues but generally solid. That's 7 points above the national average of 82%.
At 18 years old, 89% of BMW M6s from 2008 passed their MOT first time in 2026. That's based on 57 tests across the UK. The average mileage at this age is 67,934 miles.
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How Does It Compare?
Mileage Analysis
67,934
Average miles
133,200
Expected for age
The average 2008 BMW M6 has 67,934 miles on the clock, which is below the expected 133,200 miles for a 18-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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Best Year to Buy?
The most reliable year is the 2014 model with a 95% MOT pass rate, while the 2005 model has the lowest at 87%. The 2008 sits between the two at 89%.
BMW M6 by Year
Similar Cars to Consider
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About the 2008 BMW M6
The 2008 BMW M6 is a premium performance with a 4999cc petrol engine. 57 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 12% of all 2008 cars for reliability.
With an average of 67,934 miles at 18 years old, BMW M6 owners tend to use this car less than the typical driver.
2008 BMW M6 Fuel Costs
The 4999cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2008 BMW M6?
Total estimated annual running cost is £2,757 (£230/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 89% pass rate. Keeping on top of servicing will help avoid surprises.
BMW M6 Reliability Trend
The BMW M6 has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
Buying a Used 2008 BMW M6
At 18 years old, the BMW M6 is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2014 model has the highest pass rate at 95%. Note: with only 57 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2008 BMW M6's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 18 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Rust and Corrosion
Watch outAt 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.
Suspension Bushings
Watch outRubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2008 BMW M6 stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| BMW M6(2008) | 89% | £1592 | £760 | Grp 35-50 | £2757 |
| BMW X5(2010) | 86% | £1592 | £250 | Grp 35-50 | £2247-£510 |
| AUDI A6(2009) | 81% | £1592 | £250 | Grp 35-50 | £2247-£510 |
| MERCEDES ML(2006) | 80% | £1592 | £250 | Grp 35-50 | £2247-£510 |
| PORSCHE CAYENNE(2006) | 86% | £1592 | £250 | Grp 35-50 | £2247-£510 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Bmw Models
Explore other Bmw cars or similar models in the same category.
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BMW 5 SERIES
2018 · 2998cc Petrol
BMW 116
2014 · 1995cc Diesel
BMW X5
2010 · 4799cc Petrol
AUDI A6
2009 · 4991cc Petrol
MERCEDES ML
2006 · 4966cc Petrol
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