Skip to main content
GB
MOT
Checkup

BMW 420i MOT Check

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

GB

Free, instant, no sign-up required.

98.5%

Avg Pass Rate

+8.6%

vs BMW Avg

1

Year Ranges

Excellent

Reliability

BMW 420i — MOT Reliability Overview

The BMW 420i has an average MOT pass rate of 98.5%, which is 8.6 percentage points above the BMW brand average of 89.9%. This is a strong result, indicating that the 420i is well-engineered and tends to age well mechanically. Owners can expect fewer surprises at MOT time.

Before buying a used BMW 420i, 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 performs at MOT across different model years.

2017

Based on 66 vehicles

98.5%Excellent
BMW average: 89.9%

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

BMW 420i — Frequently Asked Questions

Common questions about the BMW 420i MOT and reliability.

What is the MOT pass rate for the BMW 420i?
The average MOT pass rate for the BMW 420i is 98.5% 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?
Check the detailed breakdown on this page for specific failure data by year range.
Is the BMW 420i reliable?
With an average MOT pass rate of 98.5%, the BMW 420i 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?
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?
Mileage data for the BMW 420i is available in the detailed breakdown on this page.

Check Your BMW 420i's MOT History

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

GB