MOT fail rates by first-use year
2017 Mercedes-Benz GLA MOT fail rate and common faults
How Mercedes-Benz GLA cars first used in 2017 did at their MOTs from 2022 to 2025, against all cars of the same age. From 51,425 DVSA MOT tests of these cars. First use is usually the date the car was first registered.
MOT data updated
At 8 years, tested in 2025
What stands out
- In 2025, at 8 years old, Mercedes-Benz GLA cars first used in 2017 failed 20.1% of MOTs (12,813 tests), 3.6 points below the 23.8% for all cars that age.
- From 2022 to 2025, as these cars went from 5 to 8 years old, the fail rate moved from 11.4% to 20.1%.
- Mercedes-Benz GLA cars first used a year earlier, in 2016, failed 19.9% at the same age of 8 years (10,655 tests, in 2024).
- The most common fail item that is not a wear item, for the Mercedes-Benz GLA at 8 years, is coil spring broken, at 3.0 per 100 MOTs (all cars: 2.1).
MOT fail rate by test year
| Test year | Age | MOT fail rate | Tests (n) | All cars | Difference |
|---|---|---|---|---|---|
| 2022 | 5 years | 11.4% | 12,854 | 15.3% | −3.9 pts |
| 2023 | 6 years | 14.4% | 12,910 | 17.8% | −3.4 pts |
| 2024 | 7 years | 17.9% | 12,848 | 20.6% | −2.7 pts |
| 2025 | 8 years | 20.1% | 12,813 | 23.8% | −3.6 pts |
Most common faults at 8 years
These figures cover all Mercedes-Benz GLA MOTs at 8 years: cars first used 2014 to 2017, tested 2022 to 2025 (n=35,895). The list uses every first-use year so it has enough tests. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.
MOT fail items
| Fail item | Per 100 MOTs | All cars |
|---|---|---|
| Coil spring broken | 3.0 | 2.1 |
| Driveshaft CV boot split | 2.0 | 0.9 |
| Tyre tread below 1.6 mm Wear | 2.0 | 2.3 |
| Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt | 1.9 | 0.3 |
| Brake pads under 1.5 mm Wear | 1.7 | 2.0 |
| Engine warning lamp at the diesel emissions check: not working or showing a fault | 1.3 | 0.6 |
| Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords Wear | 1.2 | 1.3 |
| Washers: provides insufficient washer liquid Wear | 1.1 | 1.1 |
| Wipers not clearing screen Wear | 0.9 | 1.7 |
| Engine warning lamp at the petrol emissions check: not working or showing a fault | 0.9 | 0.7 |
Per 100 of the MOTs above (n=35,895). A test with two items counts once for each.
Advisories
| Advisory | Per 100 MOTs | All cars |
|---|---|---|
| Tyre tread close to the legal limit or worn on the edge Wear | 15.7 | 15.7 |
| Brake pads wearing thin Wear | 9.4 | 8.6 |
| Tyre condition: slightly damaged/cracking or perishing Wear | 8.1 | 8.6 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 7.9 | 8.6 |
| Brake discs: worn, but not excessively | 4.4 | 2.7 |
| Non-component advisories: Child Seat fitted not allowing full inspection of adult belt | 2.9 | 2.3 |
| Tyre tread close to the legal limit, under the 1.0 mm rule Wear | 2.4 | 2.1 |
| Linkage ball joint dust cover: ball joint dust cover severely deteriorated | 2.3 | 0.2 |
| Non-component advisories: Nail in tyre | 2.2 | 1.9 |
| Drive shaft joints: constant velocity boot severely deteriorated | 2.0 | 0.6 |
Per 100 of the MOTs above (n=35,895). A test with two items counts once for each.
Fuel type at 8 years
These figures cover all Mercedes-Benz GLA MOTs at 8 years: cars first used 2014 to 2017, tested 2022 to 2025 (n=35,895). Each fuel is set against all cars of the same fuel and age. Fuels with fewer than 1,000 tests are not shown.
| Fuel | Share of tests | MOT fail rate | Tests (n) | All cars, same fuel | Median mileage |
|---|---|---|---|---|---|
| Diesel | 84.3% | 19.8% | 30,259 | 25.1% | 62,873 miles |
| Petrol | 15.7% | 16.1% | 5,636 | 22.8% | 49,966 miles |
Fail rate by mileage at 8 years
These figures cover all Mercedes-Benz GLA MOTs at 8 years: cars first used 2014 to 2017, tested 2022 to 2025 (n=35,895). At 8 years, Mercedes-Benz GLA cars at 90,000 to 120,000 miles failed more often (25.9%, n=3,597) than those at under 30,000 miles (10.5%, n=2,064). Bands with fewer than 1,000 tests are not shown.
| Mileage at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|
| Under 30,000 miles | 10.5% | 2,064 | 13.4% |
| 30,000 to 60,000 miles | 16.2% | 15,190 | 21.0% |
| 60,000 to 90,000 miles | 21.6% | 14,133 | 26.6% |
| 90,000 to 120,000 miles | 25.9% | 3,597 | 30.2% |
Car tax rules for a 2017 car
- Cars first registered from 1 March 2001 to 31 March 2017 are taxed by CO2 emissions band, from band A (the lowest emissions) to band M. The band is set by the CO2 figure on the V5C logbook.
- Cars first registered from 1 April 2017 pay a first-year rate set by CO2 emissions, then the standard rate each year. A petrol, diesel or hybrid car with a list price over £40,000 also pays the expensive car supplement for five years, from the second tax payment.
- A car first used in 2017 can fall under either rule, so the registration date on the logbook decides.
These are the rules, not the amount for a specific car. Car tax check
ULEZ and clean air zones
- Petrol cars first registered from 2006 usually meet Euro 4, the petrol standard for the London ULEZ, so they usually do not pay the daily charge.
- Diesel cars first registered from September 2015 usually meet Euro 6, the diesel standard for the London ULEZ, so they usually do not pay the daily charge.
- The clean air zones in Birmingham and Bristol use the same Euro 4 petrol and Euro 6 diesel standards. The low emission zones in Scotland use them too, but enforce them with fines, not a daily charge.
The Euro standard of the car decides, not the year alone. ULEZ checker
Other years of the Mercedes-Benz GLA
Other Mercedes-Benz models first used in 2017
| Model | Age at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|---|
| Mercedes-Benz A-Class (2017) | 8 years in 2025 | 22.0% | 40,845 | 23.8% |
| Mercedes-Benz C-Class (2017) | 8 years in 2025 | 18.3% | 39,747 | 23.8% |
| Mercedes-Benz E-Class (2017) | 8 years in 2025 | 16.8% | 21,961 | 23.8% |
| Mercedes-Benz GLC (2017) | 8 years in 2025 | 15.9% | 12,525 | 23.8% |
| Mercedes-Benz CLA (2017) | 8 years in 2025 | 23.1% | 8,283 | 23.8% |
| Mercedes-Benz B-Class (2017) | 8 years in 2025 | 19.5% | 5,719 | 23.8% |
| Mercedes-Benz GLE (2017) | 8 years in 2025 | 13.5% | 4,481 | 23.8% |
| Mercedes-Benz SLC (2017) | 8 years in 2025 | 17.6% | 3,441 | 23.8% |
More on the Mercedes-Benz GLA
Found one you might buy? Vet the specific car.
These figures describe 2017 Mercedes-Benz GLA cars as a group, not any one car. The VetTheCar Buying Report looks at the car you are buying: its MOT history, what similar cars did next, and what to ask the seller.
Source
Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.
Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources
Car tax and clean air zone rules are summarised from GOV.UK and Transport for London guidance. They are general rules and are not drawn from the MOT data.