MOT fail rates

Mercedes-Benz Gla MOT fail rate by age

How often the Mercedes-Benz Gla fails its MOT at each age, compared with all cars of the same age, and what it fails on. From 329,115 DVSA MOT tests taken 2022 to 2025.

MOT data updated 22 September 2026

At 6 years, the most tested age

MOT fail rate at age 6 (n=56,883)14.5%

All cars at 6 years (n=10,382,720)17.8%

Median mileage at test43,521

All cars, median mileage44,951

113 of 340 model groups with enough tests fail less often at 6 years.

What stands out

At 3 years the Mercedes-Benz Gla fails 9.1% of MOTs (41,211 tests), 3.0 points below the 12.1% for all cars that age. At 11 years it fails 20.9% (3,462 tests), 12.4 points below the 33.3% average.
The gap is widest at 11 years: 12.4 points below all cars.
Its most common structural or mechanical fail item at 6 years: Driveshaft CV boot split, at 1.6 per 100 MOTs.

MOT fail rate by age

Solid line: this model. Dashed line: all cars at the same age.

Mercedes-Benz Gla: share of MOT tests that failed, by age, against all cars. Ages with fewer than 1,000 tests are not shown.
Age	MOT fail rate	Tests (n)	All cars	Difference	Median mileage
3 years	9.1%	41,211	12.1%	−3.0 pts	21,169 miles
4 years	9.7%	51,974	13.4%	−3.6 pts	28,055 miles
5 years	11.9%	55,338	15.3%	−3.5 pts	35,177 miles
6 years	14.5%	56,883	17.8%	−3.4 pts	43,521 miles
7 years	17.5%	48,993	20.6%	−3.1 pts	52,374 miles
8 years	19.2%	35,895	23.8%	−4.5 pts	60,798 miles
9 years	21.2%	23,022	27.1%	−5.9 pts	68,867 miles
10 years	22.5%	12,337	30.3%	−7.8 pts	75,641 miles
11 years	20.9%	3,462	33.3%	−12.4 pts	79,563 miles

Most common fail items at 6 years

Split into structural or mechanical items and wear items. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.

Structural and mechanical

Fail item	Per 100 MOTs
Driveshaft CV boot split Major	1.6
Coil spring broken Major	0.9
Malfunction indicator lamp: inoperative or indicates a malfunction Major	0.7

Out of 56,883 MOTs. A test with two faults counts twice.

Wear and upkeep

Fail item	Per 100 MOTs
Tyre tread below 1.6 mm Dangerous	2.8
Brake pads under 1.5 mm Dangerous	1.9
Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords Major	1.5
Washers: provides insufficient washer liquid Major	1.1
Wipers not clearing screen Major	1.1
Tyre with cords exposed Dangerous	0.8
Tyre condition: has a tear, caused by separation or partial failure of its structure Dangerous	0.7

Out of 56,883 MOTs. A test with two faults counts twice.

Other models at 6 years

Model	MOT fail rate	Tests (n)	All cars
Mercedes-Benz A-Class	16.2%	173,010	17.8%
Mercedes-Benz C-Class	15.6%	133,032	17.8%
Mercedes-Benz E-Class	15.1%	88,280	17.8%

MOT fail rate by first-use year

Each year has its own page: the fail rate for cars first used that year at each MOT from 2022 to 2025 with at least 1,000 tests, the most common faults at that age, and the car tax and ULEZ rules for that year.

First-use year data updated 28 September 2026.

Latest MOT age with at least 1,000 tests for each first-use year.
First used	Age at test	MOT fail rate	Tests (n)	All cars
2014	11 years in 2025	20.9%	3,462	33.3%
2015	10 years in 2025	23.5%	8,855	30.3%
2016	9 years in 2025	22.6%	10,621	27.1%
2017	8 years in 2025	20.1%	12,813	23.8%
2018	7 years in 2025	18.1%	16,466	20.6%
2019	6 years in 2025	14.5%	16,804	17.8%
2020	5 years in 2025	10.2%	9,073	15.3%
2021	4 years in 2025	8.4%	9,083	13.4%
2022	3 years in 2025	8.6%	5,021	12.1%

More on the Mercedes-Benz Gla

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

Looking at one Mercedes-Benz Gla?

These are figures for the model, not for one car. The VetTheCar Buying Report looks at a single car: its MOT tests, defects, advisories and mileage readings.

See an example report Browse the car tools

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 22 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources