DVSA Statistics
1979 Triumph Stag
MOT Pass Rate & Pre-MOT Checklist
There isn't much MOT data yet for the 1979 Triumph Stag (only 5 tests in our DVSA dataset), so these figures are a rough guide. We still highlight common failure items below so you can check before your MOT.
Pass Rate
Based on 5 DVSA anonymised MOT tests · About this data
Pass Rate
80%
Higher than average
Limited data available for this model; results may be less representative.
Top Failure Reasons
Common MOT failures for this model
Based on DVSA statistics from 5 recorded tests.
Pre-MOT Checklist for 1979 Triumph Stag
Based on common failure points for this model, check these items before your MOT:
- 1
Visually inspect coil springs for cracks or broken coils
Suspension – Common fail on this model
Do you own this car?
Check your specific vehicle for outstanding advisories or recalls. Get a personalized risk report for your exact Triumph Stag.
Frequently Asked Questions
Is a 1979 Triumph Stag likely to fail its MOT?
Based on DVSA statistics, the 1979 Triumph Stag has a 80% 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 1979 Triumph Stag?
The most common MOT failure reasons for a 1979 Triumph Stag are: a spring or spring component fractured or seriously weakened, the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired, seat belt not functioning as intended or of an incorrect type. Many of these can be checked and fixed before your test to improve your chances of passing.
How can I reduce the chance my 1979 Triumph Stag fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: a spring or spring component fractured or seriously weakened, the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired, seat belt not functioning as intended or of an incorrect type. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1979 Triumph Stags fail their MOT?
Around 20% of 1979 Triumph Stags fail their MOT test, meaning roughly 1 in 5 don't pass first time. The most common reasons are a spring or spring component fractured or seriously weakened and the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired. Pre-checking these items can significantly improve your chances.
What should I check before my 1979 Triumph Stag MOT?
Before your 1979 Triumph Stag MOT, check these commonly-failed items: a spring or spring component fractured or seriously weakened, the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired, seat belt not functioning as intended or of an incorrect type. 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 1979 Triumph Stag reliable for MOT?
With a 80% MOT pass rate, the 1979 Triumph Stag performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.