Mercedes-Benz Gt MOT pass rate & common failures
6,761 MOT tests on the Mercedes-Benz Gt (1997–2022) give it a 94.1% pass rate. Against all cars of a similar age (12.9% fail rate), the Gt comes out 7.1pp better. Its most common failure areas are tyres, other defects and lighting & signalling.
What the MOT record shows
No single area dominates — tyres (3.6%) and other defects (1.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are registration plates, tread depth and catalyst emissions — registration plates alone was recorded 108 times.
A 60-90k example is materially riskier than a 0-30k one: 14.1% versus 4.9%.
Advisories point at the next bill rather than this one: tyres was flagged on 13.9% of tests without failing them.
How it compares
By model year
Every Gt model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2015 | 1,203 | 93.7% | 6.3% | Tyres |
| 2016 | 1,541 | 93.3% | 6.8% | Tyres |
| 2017 | 1,350 | 94.4% | 5.6% | Tyres |
| 2018 | 1,562 | 95.3% | 4.7% | Tyres |
| 2019 | 859 | 94.0% | 6.0% | Tyres |
| 2020 | 200 | 93.0% | 7.0% | Tyres |
| 2021 | 38 | 97.4% | 2.6% | Tyres |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.6% | 243 |
| 2 | Other defects | 1.0% | 67 |
| 3 | Lighting & signalling | 1.0% | 65 |
| 4 | Emissions & environmental | 0.7% | 49 |
| 5 | Visibility | 0.3% | 20 |
| 6 | Suspension | 0.2% | 14 |
| 7 | Road wheels | 0.2% | 14 |
| 8 | Brakes | 0.2% | 13 |
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 | 108 |
| 2 | Tread depth | 92 |
| 3 | Catalyst emissions | 54 |
| 4 | Headlamp aim | 51 |
| 5 | Wipers | 15 |
| 6 | Horn | 13 |
| 7 | Brake pads | 12 |
| 8 | Catalytic converter | 11 |
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 | 13.9% | 937 |
| 2 | Visibility | 2.3% | 155 |
| 3 | Brakes | 2.1% | 142 |
| 4 | Other defects | 2.0% | 138 |
| 5 | Emissions & environmental | 0.5% | 36 |
| 6 | Road wheels | 0.4% | 30 |
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 | 5,357 | 4.9% |
| 30-60k | 1,294 | 9.3% |
| 60-90k | 106 | 14.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 1,165 | 5.7% |
| 2022 | 1,351 | 5.0% |
| 2023 | 1,395 | 6.3% |
| 2024 | 1,413 | 5.9% |
| 2025 | 1,437 | 6.4% |
What to check before buying a Mercedes-Benz Gt
- Tyres (3.6% 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.
- Other defects (1.0% of tests): Miscellaneous items not in the main categories. Typical repair: varies.
- Lighting & signalling (1.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£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
What is the MOT pass rate for the Mercedes-Benz Gt?
94.1% of the 6,761 Mercedes-Benz Gt MOT tests in this dataset passed, a 5.9% fail rate, across model years 1997–2022.
What does the Mercedes-Benz Gt most often fail its MOT on?
Tyres, recorded in 3.6% of tests, then other defects (1.0%).
How much does mileage affect Gt MOT results?
Fail rates run at 4.9% for cars in the 0-30k band and 14.1% for 60-90k, a 9.3-point difference.
Methodology & source. Based on 6,761 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.