MG B Gt MOT Check

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

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79.5%

Avg Pass Rate

-3.6%

vs MG Avg

Year Ranges

Good

Reliability

MG B Gt — MOT Reliability Overview

The MG B Gt has an average MOT pass rate of 79.5%, which is 3.6 percentage points below the MG brand average of 83.1%. This is a reasonable result that reflects typical UK reliability standards. Regular servicing and addressing advisories promptly will help keep your B Gt on the road.

The most common reasons a MG B Gt fails its MOT are a lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, emissions levels exceed default limits, steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc. If you are preparing your B Gt 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 MG B Gt, 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 B Gt performs at MOT across different model years.

1981

Based on 196 vehicles

76.5%Good

MG average: 83.1%

Dangerous Defects

4.8%

Retest Rate

19.0%

1980

Based on 172 vehicles

73.8%Average

MG average: 83.1%

Dangerous Defects

1.0%

Retest Rate

21.9%

1979

Based on 198 vehicles

77.8%Good

MG average: 83.1%

Dangerous Defects

1.8%

Retest Rate

17.0%

1978

Based on 251 vehicles

80.5%Good

MG average: 83.1%

Dangerous Defects

1.4%

Retest Rate

13.7%

1977

Based on 108 vehicles

75.0%Good

MG average: 83.1%

Dangerous Defects

1.7%

Retest Rate

17.2%

1976

Based on 66 vehicles

71.2%Average

MG average: 83.1%

Dangerous Defects

5.3%

Retest Rate

10.5%

1975

Based on 170 vehicles

84.1%Good

MG average: 83.1%

Dangerous Defects

4.5%

Retest Rate

9.9%

1974

Based on 247 vehicles

81.0%Good

MG average: 83.1%

Dangerous Defects

2.9%

Retest Rate

16.5%

1973

Based on 310 vehicles

89.0%Excellent

MG average: 83.1%

Dangerous Defects

1.6%

Retest Rate

7.7%

1972

Based on 464 vehicles

83.4%Good

MG average: 83.1%

Dangerous Defects

1.5%

Retest Rate

10.6%

0

Based on 1,607 vehicles

82.1%Good

MG average: 83.1%

Mileage at 5yr

46k mi

Top MOT Failures — MG B Gt

The most common reasons a MG B Gt fails its MOT, aggregated across all year ranges.

A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

6.1%

Emissions levels exceed default limits

5.7%

Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc

2.2%

MG B Gt Common Faults & Repair Costs

Where Failures Occur

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

Rear Nearside

2.6%

Front Nearside

2.6%

Rear

2.6%

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

70.0% pass rate

MG Mgb Roadster

95.5% 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 B Gt

MG B Gt — Frequently Asked Questions

Common questions about the MG B Gt MOT and reliability.

What is the MOT pass rate for the MG B Gt?

The average MOT pass rate for the MG B Gt is 79.5% 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 B Gt?

The most common MOT failures on the MG B Gt are: A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning (6.1%), Emissions levels exceed default limits (5.7%), Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc (2.2%). These are the components most likely to cause an MOT failure.

Is the MG B Gt reliable?

With an average MOT pass rate of 79.5%, the MG B Gt 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 B Gt?

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 B Gt?

Typical mileage for the MG B Gt: 45,579 miles at 5 years. Use these benchmarks when evaluating a used B Gt to spot vehicles with unusually high or low mileage.

Check Your MG B Gt's MOT History

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