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MG MGB MOT Check

MOT pass rates, common failures, and reliability data for the MG MGB. Check any MGB by registration number below.

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82.8%

Avg Pass Rate

-0.4%

vs MG Avg

6

Year Ranges

Good

Reliability

MG MGB — MOT Reliability Overview

The MG MGB has an average MOT pass rate of 82.8%, which is 0.4 percentage points below the MG brand average of 83.1%. This is a strong result, indicating that the MGB is well-engineered and tends to age well mechanically. Owners can expect fewer surprises at MOT time.

Before buying a used MG MGB, 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 MG MGB performs at MOT across different model years.

1981

Based on 30 vehicles

70.0%Average
MG average: 83.1%
Retest Rate

27.8%

1978

Based on 45 vehicles

80.0%Good
MG average: 83.1%
Dangerous Defects

0.0%

Retest Rate

14.3%

1974

Based on 57 vehicles

80.7%Good
MG average: 83.1%
Dangerous Defects

2.9%

Retest Rate

20.6%

1973

Based on 100 vehicles

90.0%Excellent
MG average: 83.1%
Dangerous Defects

2.9%

Retest Rate

18.6%

1972

Based on 109 vehicles

91.7%Excellent
MG average: 83.1%
Dangerous Defects

3.1%

Retest Rate

6.3%

0

Based on 384 vehicles

84.1%Good
MG average: 83.1%
Mileage at 5yr

41k mi

Where Failures Occur

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

Rear Offside

3.3%

Other MG Models

Compare MOT reliability across MG models.

MG ZR

74.1% pass rate

MG 6

64.3% pass rate

MG 3

76.5% pass rate

MG Mgb Roadster

95.5% pass rate

MG B Gt

75.0% pass rate

MG B

88.0% 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 MG MGB

MG MGB — Frequently Asked Questions

Common questions about the MG MGB MOT and reliability.

What is the MOT pass rate for the MG MGB?
The average MOT pass rate for the MG MGB is 82.8% compared to the MG average of 83.1%. 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 MG MGB?
Check the detailed breakdown on this page for specific failure data by year range.
Is the MG MGB reliable?
With an average MOT pass rate of 82.8%, the MG MGB is rated as "Good" for reliability. This is a strong result suggesting good build quality and fewer common defects.
How do I check the MOT history of a MG MGB?
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 MG MGB?
Typical mileage for the MG MGB: 41,194 miles at 5 years. Use these benchmarks when evaluating a used MGB to spot vehicles with unusually high or low mileage.

Check Your MG MGB's MOT History

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

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