2014 Bentley Mulsanne — MOT failures & pass rate
470 MOT tests on the 2014 Bentley Mulsanne are in this dataset, and 96.8% of them passed. Against all cars of a similar age (18.2% fail rate), the 2014 Mulsanne comes out 15.0pp better. Failures cluster in lighting & signalling, tyres and visibility.
What the MOT record shows
No single area dominates — lighting & signalling (1.7%) and tyres (1.3%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, malfunction indicator lamp and tyre pressure monitoring system — headlamp aim alone was recorded 7 times.
Advisories point at the next bill rather than this one: tyres was flagged on 10.6% of tests without failing them.
The trend is improving — the fail rate fell from 6.9% in 2021 to 0.0% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 1.7% | 8 |
| 2 | Tyres | 1.3% | 6 |
| 3 | Visibility | 0.6% | 3 |
| 4 | Emissions & environmental | 0.6% | 3 |
| 5 | Seat belts & restraints | 0.6% | 3 |
| 6 | Body, structure & corrosion | 0.2% | 1 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 7 |
| 2 | Malfunction indicator lamp | 3 |
| 3 | Tyre pressure monitoring system | 3 |
| 4 | Other body component | 2 |
| 5 | Registration plates | 2 |
| 6 | SRS malfunction indicator lamp | 2 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 10.6% | 50 |
| 2 | Brakes | 3.8% | 18 |
| 3 | Steering | 3.6% | 17 |
| 4 | Suspension | 3.0% | 14 |
| 5 | Other defects | 2.5% | 12 |
| 6 | Visibility | 1.3% | 6 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 247 | 2.4% |
| 30-60k | 195 | 4.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 102 | 6.9% |
| 2022 | 98 | 4.1% |
| 2023 | 90 | 2.2% |
| 2024 | 92 | 2.2% |
| 2025 | 88 | 0.0% |
What to check before buying a 2014 Mulsanne
On a 2014 Mulsanne, lighting & signalling is what the MOT record says goes wrong most — it appeared in 1.7% of tests. Check these areas before you commit.
- Lighting & signalling (1.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Tyres (1.3% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Visibility (0.6% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2014 Bentley Mulsannes pass their MOT?
96.8% of the 470 2014 Bentley Mulsanne MOT tests in this dataset passed — a 3.2% fail rate.
What is the most common MOT failure on a 2014 Bentley Mulsanne?
Lighting & signalling, recorded in 1.7% of tests, followed by tyres (1.3%).
Does the 2014 Mulsanne get worse with mileage?
Its MOT fail rate rises from 2.4% in the 0-30k band to 4.1% in the 30-60k band.
Methodology & source. Based on 470 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.