Which model group has the lower recorded MOT failure rate: Mercedes-Benz A-Class or BMW 1 Series?

Across 1,814,040 recorded MOT tests, the BMW 1 Series group has a 0.6 percentage point lower historical failure rate. The Mercedes-Benz A-Class group rate is 19.4% and the BMW 1 Series group rate is 18.7%. These population statistics do not predict an individual vehicle's result.

What are the main MOT differences between Mercedes-Benz A-Class and BMW 1 Series?

The Mercedes-Benz A-Class has a 19.4% overall MOT failure rate (1,447,337 tests) while the BMW 1 Series has 18.7% (366,703 tests). The highest complete component category for the Mercedes-Benz A-Class is tyres, while for the BMW 1 Series it is lamps & electrics.

Should I buy a Mercedes-Benz A-Class or BMW 1 Series?

This aggregate MOT comparison is not a buying recommendation. It describes recorded model-group outcomes, not the condition or likely result of a particular vehicle. Check the specific vehicle's MOT history and condition before deciding.

Mercedes-Benz A-Class vs BMW 1 Series — MOT Failure Rate Comparison

Mercedes-Benz A-Class

19.4%

failure rate from 1,447,337 tests

7.6pp below the dataset reference (26.9%)

BMW 1 Series

18.7%

failure rate from 366,703 tests

8.2pp below the dataset reference (26.9%)

Recorded-rate result: The BMW 1 Series model group has a 0.6 percentage point lower historical failure rate than the Mercedes-Benz A-Class group in this dataset.

Failure Rate by Vehicle Age

How the Mercedes-Benz A-Class and BMW 1 Series compare across different age groups:

Age	Mercedes-Benz A-Class	BMW 1 Series	Difference
0-2 years	9.9%	9.4%	BMW 1 Series +0.4pp
3-5 years	12.4%	10.5%	BMW 1 Series +1.9pp
6-10 years	21.5%	20.2%	BMW 1 Series +1.2pp
11-15 years	34.7%	29.7%	BMW 1 Series +5.0pp
15+ years	43.3%	37.0%	BMW 1 Series +6.3pp

Recorded Component Comparison

Side-by-side aggregate rates for MOT tests involving each component category. These are group statistics, not a diagnosis of either vehicle.

Mercedes-Benz A-Class Component BMW 1 Series

3.3%

Tyres

3.2%

3.0%

Lamps & Electrics

3.4%

2.2%

Suspension

1.8%

2.1%

Brakes

1.8%

Visibility

1.5%

0.6%

Body & Chassis

0.3%

0.1%

Steering

0.2%

Component	Mercedes-Benz A-Class	BMW 1 Series	Lower rate
Tyres	3.3%	3.2%	BMW 1 Series
Lamps & Electrics	3.0%	3.4%	Mercedes-Benz A-Class
Suspension	2.2%	1.8%	BMW 1 Series
Brakes	2.1%	1.8%	BMW 1 Series
Visibility	1.8%	1.5%	BMW 1 Series
Body & Chassis	0.6%	0.3%	BMW 1 Series
Steering	0.1%	0.2%	Mercedes-Benz A-Class

Which Has the Lower Recorded Failure Rate?

Based on official DVSA MOT test records covering 1,814,040 tests between these two models, the BMW 1 Series group has a 0.6 percentage point lower overall failure rate. The BMW 1 Series group rate is 18.7% compared with 19.4% for the Mercedes-Benz A-Class group.

The age-band table shows whether that gap is consistent across the available groups. The highest recorded component category is tyres for the Mercedes-Benz A-Class group and lamps & electrics for the BMW 1 Series group. Category rates show historical involvement in failed tests; they do not identify a fault on a particular vehicle.

Explore Each Model in Detail

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Data methodology: Failure rates are weighted averages across all mileage bands, calculated from official DVSA MOT test records. Only age/mileage combinations with 100+ tests are included. Component percentages are weighted recorded category rates, not probabilities for an individual vehicle. The checked-in dataset contains 148,509,908 tests and 39,969,903 failures. Vehicle condition and history are not captured by these group comparisons.

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