Mercedes-Benz GT MOT pass rate and common failures
In 2025, 92.6% of Mercedes-Benz GT MOT tests were a first-time pass, across 1,372 tests in Great Britain. For all cars it was 71.5%.
Compared with cars of the same age
Older cars fail more often, so a model that’s mostly a few years old will look better than one that’s mostly 12. These figures compare like with like.
At 3–5 years
91.8%
All cars: 86.1% (5.7 points better). 159 tests.
At 6–10 years
92.5%
All cars: 76.1% (16.4 points better). 1,161 tests.
At 11 years and over
–
Too few tests at this age to say.
Pass rate by age
Figures by age, with typical mileage
| Age (years) | Tests | First-time pass | All cars | Typical mileage |
|---|---|---|---|---|
| 5 | 159 | 91.8% | 84.5% | 18,750 miles |
| 6 | 260 | 92.7% | 81.9% | 18,750 miles |
| 7 | 300 | 95.0% | 79.3% | 18,750 miles |
| 8 | 203 | 90.6% | 76.3% | 26,250 miles |
| 9 | 318 | 90.9% | 73.1% | 28,750 miles |
| 10 | 80 | 93.8% | 70.0% | 28,750 miles |
Typical mileage is the median reading at the test, to the nearest 2,500 miles.
What fails most often
The share of Mercedes-Benz GT MOT tests that failed on at least one item in each area, against all cars. A test can fail on several areas at once.
| Area | GT | All cars |
|---|---|---|
| Tyres | 6.0% | 8.4% |
| Noise, emissions and leaks | 1.4% | 4.0% |
| Lamps, reflectors and electrical equipment | 1.2% | 16.6% |
| Identification of the vehicle | 1.0% | 0.4% |
| Suspension | 0.4% | 13.7% |
| Brakes | 0.4% | 10.2% |
| Seat belts and supplementary restraint systems | 0.3% | 1.1% |
| Road wheels | 0.2% | 0.5% |
Most common reasons for failing
- Condition: has ply or cords exposed failed 2.0% of tests
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords failed 1.8% of tests
- Tread depth below requirements of 1.6mm failed 1.6% of tests
- Registration plates: does not conform to the specified requirements failed 0.8% of tests · what this means
- Catalyst emissions: lambda reading after 2nd fast idle outside specified limits failed 0.4% of tests · what this means
- Brake pads: less than 1.5 mm thick failed 0.4% of tests · what this means
- Malfunction indicator lamp: inoperative or indicates a malfunction failed 0.3% of tests · what this means
- Horn: not working failed 0.3% of tests · what this means
- Srs malfunction indicator lamp: warning lamp indicates a fault failed 0.3% of tests · what this means
- Catalyst emissions: carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits failed 0.3% of tests · what this means
Checking a particular GT?
See its own MOT history, mileage record and advisories in plain English. Free, no sign-up.
About these figures
- They cover every GT version DVSA records under this name (engines, trims and generations together), on its first MOT test of each visit. A “pass with rectification” (fixed within an hour) counts as a fail, as in DVSA’s own statistics.
- Cars under three years old are left out, because the few tested that young are mostly taxis.
- Fuel mix of the cars tested: petrol 100.0%.
- A pass rate describes the model, not any one car. How a car has been looked after matters more.
Download these figures (CSV) · Other Mercedes-Benz models · All makes
Source: DVSA anonymised MOT test data for 2025. Contains public sector information licensed under the Open Government Licence v3.0. Our own analysis; not produced or endorsed by DVSA.