DVSA Statistics
1977 MG B
MOT Pass Rate & Pre-MOT Checklist
Used 1977 MG Bs usually pass their MOT, but around 1 in 4 still fail, most often for emissions levels exceed default limits, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users and a wheel bearing with excessive play. Based on 158 MOT tests from DVSA data, this page shows how this model performs and what to check before your test.
Pass Rate
Based on 158 DVSA anonymised MOT tests · About this data
Pass Rate
75.3%
About average
Top Failure Reasons
Common MOT failures for this model
Parts Available
Brakes are a common wear item.
Based on DVSA statistics from 158 recorded tests.
Pre-MOT Checklist for 1977 MG B
Based on common failure points for this model, check these items before your MOT:
- 1
Ensure engine is at operating temperature before test - take a good run beforehand
Emissions – Common fail on this model
- 2
Check for excessive play in steering wheel - should be minimal free movement
Steering – Common fail on this model
- 3
Test brakes for effectiveness, pull, and unusual noises when driving
Brakes – Common fail on this model
How Does This Compare to Other Years?
Previous Year
1976 MG B
Based on 104 UK MOT tests
Next Year
1978 MG B
Based on 213 UK MOT tests
Compare how MOT performance varies across MG B model years.
Why Trust This Data?
Official UK Government Source
This data comes from the UK's Driver and Vehicle Standards Agency (DVSA), the official body responsible for MOT testing standards. The anonymised MOT test data is published via data.gov.uk.
Understanding the Statistics
This page is based on 158 MOT tests from the 2023 DVSA dataset. Your 1977 MG B was 46 years old when this data was collected and is now 49 years old.
Sample Size
Moderate confidence - 158 tests (interpret with caution)
Limitations
Statistics reflect average outcomes and don't account for maintenance history, mileage, or regional variations. Individual results will vary based on how well a vehicle has been maintained.
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Check your specific vehicle for outstanding advisories or recalls. Get a personalized risk report for your exact MG B.
Frequently Asked Questions
Is a 1977 MG B likely to fail its MOT?
Based on DVSA statistics, the 1977 MG B has a 75.3% MOT pass rate. This is above average, indicating good reliability for a vehicle of this age.
What are the most common MOT failures on a 1977 MG B?
The most common MOT failure reasons for a 1977 MG B are: emissions levels exceed default limits, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, a wheel bearing with excessive play. Many of these can be checked and fixed before your test to improve your chances of passing.
How can I reduce the chance my 1977 MG B fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: emissions levels exceed default limits, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, a wheel bearing with excessive play. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1977 MG Bs fail their MOT?
Around 25% of 1977 MG Bs fail their MOT test, meaning roughly 1 in 4 don't pass first time. The most common reasons are emissions levels exceed default limits and fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users. Pre-checking these items can significantly improve your chances.
What should I check before my 1977 MG B MOT?
Before your 1977 MG B MOT, check these commonly-failed items: emissions levels exceed default limits, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, a wheel bearing with excessive play. Most are visual checks you can do at home – look for worn tyres, test all lights work, and check for obvious damage or leaks.
Is the 1977 MG B reliable for MOT?
With a 75.3% MOT pass rate, the 1977 MG B performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.