Which model group has the lower recorded MOT failure rate: BMW 1 Series or Audi A3?

Across 2,194,296 recorded MOT tests, the BMW 1 Series group has a 4.6 percentage point lower historical failure rate. The BMW 1 Series group rate is 18.7% and the Audi A3 group rate is 23.4%. These population statistics do not predict an individual vehicle's result.

What are the main MOT differences between BMW 1 Series and Audi A3?

The BMW 1 Series has a 18.7% overall MOT failure rate (366,703 tests) while the Audi A3 has 23.4% (1,827,593 tests). The highest complete component category for the BMW 1 Series is lamps & electrics, while for the Audi A3 it is lamps & electrics.

Should I buy a BMW 1 Series or Audi A3?

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.

BMW 1 Series vs Audi A3 — MOT Failure Rate Comparison

BMW 1 Series

18.7%

failure rate from 366,703 tests

8.2pp below the dataset reference (26.9%)

Audi A3

23.4%

failure rate from 1,827,593 tests

3.5pp below the dataset reference (26.9%)

Recorded-rate result: The BMW 1 Series model group has a 4.6 percentage point lower historical failure rate than the Audi A3 group in this dataset.

Failure Rate by Vehicle Age

How the BMW 1 Series and Audi A3 compare across different age groups:

Age	BMW 1 Series	Audi A3	Difference
0-2 years	9.4%	10.0%	BMW 1 Series +0.6pp
3-5 years	10.5%	10.6%	BMW 1 Series +0.1pp
6-10 years	20.2%	18.6%	Audi A3 +1.7pp
11-15 years	29.7%	35.3%	BMW 1 Series +5.6pp
15+ years	37.0%	43.1%	BMW 1 Series +6.2pp

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.

BMW 1 Series Component Audi A3

3.4%

Lamps & Electrics

4.0%

3.2%

Tyres

3.5%

1.8%

Brakes

2.6%

1.8%

Suspension

3.9%

1.5%

Visibility

1.5%

0.3%

Body & Chassis

1.4%

0.2%

Steering

0.2%

Component	BMW 1 Series	Audi A3	Lower rate
Lamps & Electrics	3.4%	4.0%	BMW 1 Series
Tyres	3.2%	3.5%	BMW 1 Series
Brakes	1.8%	2.6%	BMW 1 Series
Suspension	1.8%	3.9%	BMW 1 Series
Visibility	1.5%	1.5%	Equal
Body & Chassis	0.3%	1.4%	BMW 1 Series
Steering	0.2%	0.2%	BMW 1 Series

Which Has the Lower Recorded Failure Rate?

Based on official DVSA MOT test records covering 2,194,296 tests between these two models, the BMW 1 Series group has a 4.6 percentage point lower overall failure rate. The BMW 1 Series group rate is 18.7% compared with 23.4% for the Audi A3 group.

The age-band table shows whether that gap is consistent across the available groups. The highest recorded component category is lamps & electrics for the BMW 1 Series group and lamps & electrics for the Audi A3 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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