2021 Bentley Bentayga — MOT failures & pass rate
Across 802 MOT tests analysed for the 2021 Bentley Bentayga, the most common recorded failure areas were tyres, lighting & signalling and other defects. Its pass rate of 96.9% was above the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 2.5% | 20 |
| 2 | Lighting & signalling | 0.6% | 5 |
| 3 | Other defects | 0.5% | 4 |
| 4 | Visibility | 0.3% | 2 |
| 5 | Emissions & environmental | 0.1% | 1 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Registration plates | 5 |
| 2 | Headlamp aim | 3 |
| 3 | Headlamp | 2 |
| 4 | Washers | 1 |
| 5 | Tyre pressure monitoring system | 1 |
| 6 | Position lamp | 1 |
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 | 9.8% | 79 |
| 2 | Other defects | 3.4% | 27 |
| 3 | Brakes | 2.0% | 16 |
| 4 | Suspension | 0.6% | 5 |
| 5 | Visibility | 0.5% | 4 |
| 6 | Emissions & environmental | 0.1% | 1 |
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 | 566 | 3.2% |
| 30-60k | 219 | 2.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 400 | 3.8% |
| 2025 | 384 | 2.6% |
What to check before buying a 2021 Bentayga
Before buying a 2021 Bentley Bentayga, focus on the areas it most often fails on. Tyres accounted for 2.5% of tests for this year.
- Tyres (2.5% 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.
- Lighting & signalling (0.6% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Other defects (0.5% of tests): Miscellaneous items not in the main categories. Typical repair: varies.
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 2021 Bentley Bentaygas pass their MOT?
96.9% of the 802 2021 Bentley Bentayga MOT tests in this dataset passed — a 3.1% fail rate.
What is the most common MOT failure on a 2021 Bentley Bentayga?
Tyres, recorded in 2.5% of tests, followed by lighting & signalling (0.6%).
Does the 2021 Bentayga get worse with mileage?
Its MOT fail rate rises from 3.2% in the 0-30k band to 2.7% in the 30-60k band.
Methodology & source. Based on 802 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.