MOT performance
2021 Mercedes-Benz CLA: MOT pass rate and common failures
Of 10,034 MOT tests on 2021-registered Mercedes-Benz CLAs in 2023–2024 (on average 2.3 years old at test, median 28,668 miles), 86.0% passed first time, 5.2 points higher than the Mercedes-Benz CLA overall. Allowing for age, mileage and fuel, 2021 Mercedes-Benz CLAs failed 7% more often than comparable cars.
10,034 MOT tests on 9,141 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
Check a specific car's MOT history and running costsAt a glance
| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 86.0% | ±0.7 pts (95%), n = 10,034 |
| All Mercedes-Benz CLAs | 80.8% | n = 117,936 |
| Failures vs similar cars | 1.07× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 5.2% | n = 10,034 |
| Average age at test | 2.3 years | n = 10,034 |
Where 2021 Mercedes-Benz CLAs fail
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Tyres | 7.5% | +43% |
| Lights, reflectors and electrical | 2.8% | -4% |
| Driver's view of the road | 2.3% | -27% |
| Brakes | 1.9% | -11% |
| Registration plates and VIN | 0.5% | +138% |
| Suspension | 0.5% | -31% |
| Seat belts and airbags | 0.3% | -12% |
| Noise, emissions and leaks | 0.3% | -44% |
| Road wheels | 0.2% | +47% |
| Body, chassis and structure | 0.2% | -45% |
| Steering | 0.1% | +24% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Condition: has a cut in excess of the requirements deep enough to reach the ply or cords | Tyres | 3.36% |
| Condition: has ply or cords exposed | Tyres | 2.05% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 1.54% |
| Wipers: does not clear the windscreen effectively | Driver's view of the road | 1.28% |
| Headlamp aim: too low | Lights, reflectors and electrical | 1.07% |
Check a specific 2021 Mercedes-Benz CLA
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
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About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.