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BMW 420i M Sport Auto MOT Check

MOT pass rates, common failures, and reliability data for the BMW 420i M Sport Auto. Check any 420i M Sport Auto by registration number below.

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Free, instant, no sign-up required.

93.7%

Avg Pass Rate

+3.8%

vs BMW Avg

4

Year Ranges

Excellent

Reliability

BMW 420i M Sport Auto — MOT Reliability Overview

The BMW 420i M Sport Auto has an average MOT pass rate of 93.7%, which is 3.8 percentage points above the BMW brand average of 89.9%. This is a strong result, indicating that the 420i M Sport Auto is well-engineered and tends to age well mechanically. Owners can expect fewer surprises at MOT time.

The most common reasons a BMW 420i M Sport Auto fails its MOT are a tyre seriously damaged, tyre tread depth not in accordance with the requirements, the aim of a headlamp is not within limits laid down in the requirements. If you are preparing your 420i M Sport Auto for its MOT, checking these areas first could save you a retest fee. Our detailed fault analysis includes estimated repair costs for each failure type.

Before buying a used BMW 420i M Sport Auto, we recommend checking the full MOT history, write-off status, outstanding finance, and stolen vehicle status. These checks can be done for free using the registration number.

MOT Pass Rate by Year

How the BMW 420i M Sport Auto performs at MOT across different model years.

2022

Based on 471 vehicles

96.6%Excellent
BMW average: 89.9%
Dangerous Defects

0.6%

Retest Rate

4.2%

Mileage at 3yr

35k mi

2021

Based on 6,533 vehicles

92.9%Excellent
BMW average: 89.9%
Dangerous Defects

3.1%

Retest Rate

8.6%

Mileage at 3yr

38k mi

2020

Based on 832 vehicles

93.3%Excellent
BMW average: 89.9%
Dangerous Defects

2.9%

Retest Rate

5.3%

Mileage at 3yr

35k mi

0

Based on 435 vehicles

92.0%Excellent
BMW average: 89.9%
Mileage at 5yr

21k mi

Top MOT Failures — BMW 420i M Sport Auto

The most common reasons a BMW 420i M Sport Auto fails its MOT, aggregated across all year ranges.

1

A tyre seriously damaged

2.0%
2

Tyre tread depth not in accordance with the requirements

1.4%
3

The aim of a headlamp is not within limits laid down in the requirements

0.9%
4

A tyre cords visible or damaged

0.8%
BMW 420i M Sport Auto Common Faults & Repair Costs

Where Failures Occur

The areas of the vehicle most commonly flagged during MOT inspections.

Rear Nearside

1.5%

Front Nearside

0.8%

Front Offside

0.8%

Other BMW Models

Compare MOT reliability across BMW models.

BMW 420d Xdrive M Sport Mhev Auto

90.4% pass rate

BMW X2 Sdrive18d Sport

87.3% pass rate

BMW X2 Sdrive18d M Sport X Auto

87.0% pass rate

BMW 550

82.4% pass rate

BMW 316 I

89.0% pass rate

BMW 540i Xdrive M Sport Mhev Auto

75.6% pass rate

Useful MOT Guides

Common MOT Failures

The most common reasons UK vehicles fail their MOT — and how to prepare.

MOT Checklist

Pre-MOT checklist to improve your chances of passing first time.

Advisory vs Failure

Understanding the difference between MOT advisories and failures.

See detailed fault analysis for BMW 420i M Sport Auto

BMW 420i M Sport Auto — Frequently Asked Questions

Common questions about the BMW 420i M Sport Auto MOT and reliability.

What is the MOT pass rate for the BMW 420i M Sport Auto?
The average MOT pass rate for the BMW 420i M Sport Auto is 93.7% compared to the BMW average of 89.9%. Pass rates vary by year — check the year-by-year breakdown on this page for details.
What are the most common MOT failures on a BMW 420i M Sport Auto?
The most common MOT failures on the BMW 420i M Sport Auto are: A tyre seriously damaged (2.0%), Tyre tread depth not in accordance with the requirements (1.4%), The aim of a headlamp is not within limits laid down in the requirements (0.9%). These are the components most likely to cause an MOT failure.
Is the BMW 420i M Sport Auto reliable?
With an average MOT pass rate of 93.7%, the BMW 420i M Sport Auto is rated as "Excellent" for reliability. This is a strong result suggesting good build quality and fewer common defects.
How do I check the MOT history of a BMW 420i M Sport Auto?
Enter the vehicle's registration number in the search box at the top of this page. You will instantly see the complete MOT history including every test result, mileage readings, advisories, and dangerous defects — completely free.
What mileage should I expect on a BMW 420i M Sport Auto?
Typical mileage for the BMW 420i M Sport Auto: 35,429 miles at 3 years. Use these benchmarks when evaluating a used 420i M Sport Auto to spot vehicles with unusually high or low mileage.

Check Your BMW 420i M Sport Auto's MOT History

Enter the registration number for the full MOT history — free and instant.

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