DVSA Statistics
1978 MG B Gt
MOT Pass Rate & Pre-MOT Checklist
Used 1978 MG B Gts usually pass their MOT, but around 1 in 5 still fail, most often for a suspension pin, bush or joint excessively worn, emissions levels exceed default limits and windscreen washers not working or not providing sufficient fluid to clear the windscreen. Based on 128 MOT tests from DVSA data, this page shows how this model performs and what to check before your test.
Pass Rate
Based on 128 DVSA anonymised MOT tests · About this data
Pass Rate
80.5%
Higher than average
Top Failure Reasons
Common MOT failures for this model
Quick DIY Fix
Windscreen wipers are easy to replace yourself.
Based on DVSA statistics from 128 recorded tests.
Pre-MOT Checklist for 1978 MG B Gt
Based on common failure points for this model, check these items before your MOT:
- 1
Listen for knocks or clunks when driving over bumps - bounce each corner
Suspension – Common fail on this model
- 2
Ensure engine is at operating temperature before test - take a good run beforehand
Emissions – Common fail on this model
- 3
Check windscreen for chips or cracks in the driver view zone (Zone A)
Visibility – Common fail on this model
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Check your specific vehicle for outstanding advisories or recalls. Get a personalized risk report for your exact MG B Gt.
Frequently Asked Questions
Is a 1978 MG B Gt likely to fail its MOT?
Based on DVSA statistics, the 1978 MG B Gt has a 80.5% 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 1978 MG B Gt?
The most common MOT failure reasons for a 1978 MG B Gt are: a suspension pin, bush or joint excessively worn, emissions levels exceed default limits, windscreen washers not working or not providing sufficient fluid to clear the windscreen. Many of these can be checked and fixed before your test to improve your chances of passing.
How can I reduce the chance my 1978 MG B Gt fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: a suspension pin, bush or joint excessively worn, emissions levels exceed default limits, windscreen washers not working or not providing sufficient fluid to clear the windscreen. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1978 MG B Gts fail their MOT?
Around 20% of 1978 MG B Gts fail their MOT test, meaning roughly 1 in 5 don't pass first time. The most common reasons are a suspension pin, bush or joint excessively worn and emissions levels exceed default limits. Pre-checking these items can significantly improve your chances.
What should I check before my 1978 MG B Gt MOT?
Before your 1978 MG B Gt MOT, check these commonly-failed items: a suspension pin, bush or joint excessively worn, emissions levels exceed default limits, windscreen washers not working or not providing sufficient fluid to clear the windscreen. 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 1978 MG B Gt reliable for MOT?
With a 80.5% MOT pass rate, the 1978 MG B Gt performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.