BENTLEY MULSANNE (2015)
Running costs, reliability data, and common problems from 249 real MOT tests.
Annual Cost
£2,607
£217/month
MOT Pass Rate
95%
Excellent
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
6752cc Petrol
Great Choice
95% pass rate, £2607/year to run. 13 points above average.
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Annual Running Costs
~30 mpg
Based on 6752cc
Low estimate due to excellent reliability
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
Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%.
At 11 years old, 95% of BENTLEY MULSANNEs from 2015 passed their MOT first time in 2026. That's based on 249 tests across the UK. The average mileage at this age is 28,860 miles.
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How Does It Compare?
Mileage Analysis
28,860
Average miles
81,400
Expected for age
The average 2015 BENTLEY MULSANNE has 28,860 miles on the clock, which is significantly below the expected 81,400 miles for a 11-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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Best Year to Buy?
The most reliable year is the 2018 model with a 100% MOT pass rate, while the 1991 model has the lowest at 86%. The 2015 sits between the two at 95%.
BENTLEY MULSANNE by Year
Similar Cars to Consider
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About the 2015 BENTLEY MULSANNE
The 2015 BENTLEY MULSANNE is a luxury with a 6752cc petrol engine. 249 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It ranks in the top 13% of all 2015 cars for reliability.
With an average of 28,860 miles at 11 years old, BENTLEY MULSANNE owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2015 BENTLEY MULSANNE Fuel Costs
The 6752cc 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 2015 BENTLEY MULSANNE?
Total estimated annual running cost is £2,607 (£217/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
BENTLEY MULSANNE Reliability Trend
Newer BENTLEY MULSANNEs show better MOT pass rates than older ones, with an average improvement of 4 percentage points.
Buying a Used 2015 BENTLEY MULSANNE
At 11 years old, the BENTLEY MULSANNE 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 2018 model has the highest pass rate at 100%.
Common Issues to Watch For
Based on the 2015 BENTLEY MULSANNE's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 11 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 2015 BENTLEY MULSANNE stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| BENTLEY MULSANNE(2015) | 95% | £1592 | £760 | Grp 35-50 | £2607 |
| ROLLS ROYCE DAWN(2017) | 99% | £1592 | £190 | Grp 35-50 | £2037-£570 |
| ROLLS ROYCE WRAITH(2017) | 100% | £1592 | £190 | Grp 35-50 | £2037-£570 |
| FERRARI F12BERLINETTA(2014) | 97% | £1592 | £250 | Grp 35-50 | £2097-£510 |
| ROLLS ROYCE GHOST(2015) | 99% | £1592 | £250 | Grp 35-50 | £2097-£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.
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Explore other Bentley cars or similar models in the same category.
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