Mercedes-Benz Gla-Class MOT pass rate and common failures
In 2025, 82.9% of Mercedes-Benz Gla-Class MOT tests were a first-time pass, across 87,601 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
89.3%
All cars: 86.1% (3.2 points better). 29,194 tests.
At 6–10 years
79.8%
All cars: 76.1% (3.7 points better). 56,986 tests.
At 11 years and over
77.3%
All cars: 61.3% (16 points better). 1,421 tests.
Pass rate by age
Figures by age, with typical mileage
| Age (years) | Tests | First-time pass | All cars | Typical mileage |
|---|---|---|---|---|
| 3 | 7,068 | 91.8% | 87.8% | 28,750 miles |
| 4 | 8,428 | 91.0% | 86.4% | 33,750 miles |
| 5 | 13,698 | 87.0% | 84.5% | 38,750 miles |
| 6 | 16,674 | 82.9% | 81.9% | 46,250 miles |
| 7 | 13,802 | 80.7% | 79.3% | 56,250 miles |
| 8 | 10,855 | 78.3% | 76.3% | 66,250 miles |
| 9 | 10,161 | 76.4% | 73.1% | 73,750 miles |
| 10 | 5,494 | 77.2% | 70.0% | 78,750 miles |
| 11 | 1,421 | 77.3% | 66.9% | 81,250 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 Gla-Class 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 | Gla-Class | All cars |
|---|---|---|
| Tyres | 6.8% | 8.4% |
| Suspension | 5.9% | 13.7% |
| Brakes | 3.5% | 10.2% |
| Lamps, reflectors and electrical equipment | 3.5% | 16.6% |
| Visibility | 2.9% | 5.2% |
| Body, chassis, structure | 2.4% | 4.2% |
| Noise, emissions and leaks | 1.9% | 4.0% |
| Seat belts and supplementary restraint systems | 0.5% | 1.1% |
Most common reasons for failing
- Tread depth below requirements of 1.6mm failed 2.6% of tests
- Coil spring: fractured or broken failed 2.2% of tests · what this means
- Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt failed 2.1% of tests
- Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt failed 1.9% of tests · what this means
- Brake pads: less than 1.5 mm thick failed 1.8% of tests · what this means
- Malfunction indicator lamp: inoperative or indicates a malfunction failed 1.7% of tests · what this means
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords failed 1.7% of tests
- Wipers: does not clear the windscreen effectively failed 1.2% of tests · what this means
- Washers: provides insufficient washer liquid failed 1.0% of tests · what this means
- Ball joint dust cover no longer prevents the ingress of dirt failed 0.9% of tests · what this means
Checking a particular Gla-Class?
See its own MOT history, mileage record and advisories in plain English. Free, no sign-up.
About these figures
- They cover every Gla-Class 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: diesel 49.1%, petrol 48.3%, hybrid electric (clean) 2.6%.
- 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.