DVSA Statistics
1977 Triumph Stag
MOT Pass Rate & Pre-MOT Checklist
Used 1977 Triumph Stags usually pass their MOT, but around 1 in 6 still fail, most often for a suspension pin, bush or joint excessively worn, exhaust system leaking or insecure and fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users. Based on 125 MOT tests from DVSA data, this page shows how this model performs and what to check before your test.
Pass Rate
Based on 125 DVSA anonymised MOT tests · About this data
Pass Rate
84%
Higher than average
Top Failure Reasons
Common MOT failures for this model
Based on DVSA statistics from 125 recorded tests.
Pre-MOT Checklist for 1977 Triumph Stag
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
Check exhaust for leaks, holes, or excessive corrosion - listen for blowing
Exhaust – Common fail on this model
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Frequently Asked Questions
Is a 1977 Triumph Stag likely to fail its MOT?
Based on DVSA statistics, the 1977 Triumph Stag has a 84% 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 Triumph Stag?
The most common MOT failure reasons for a 1977 Triumph Stag are: a suspension pin, bush or joint excessively worn, exhaust system leaking or insecure, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users. 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 Triumph Stag 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, exhaust system leaking or insecure, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1977 Triumph Stags fail their MOT?
Around 16% of 1977 Triumph Stags fail their MOT test, meaning roughly 1 in 6 don't pass first time. The most common reasons are a suspension pin, bush or joint excessively worn and exhaust system leaking or insecure. Pre-checking these items can significantly improve your chances.
What should I check before my 1977 Triumph Stag MOT?
Before your 1977 Triumph Stag MOT, check these commonly-failed items: a suspension pin, bush or joint excessively worn, exhaust system leaking or insecure, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users. 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 Triumph Stag reliable for MOT?
With a 84% MOT pass rate, the 1977 Triumph Stag performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.