DVSA Statistics
1977 Triumph S
MOT Pass Rate & Pre-MOT Checklist
There isn't much MOT data yet for the 1977 Triumph S (only 14 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 14 DVSA anonymised MOT tests · About this data
Pass Rate
78.6%
About average
Limited data available for this model; results may be less representative.
Top Failure Reasons
Common MOT failures for this model
Quick DIY Fix
Headlight bulbs are a common MOT fail. Easy DIY replacement.
Based on DVSA statistics from 14 recorded tests.
Pre-MOT Checklist for 1977 Triumph S
Based on common failure points for this model, check these items before your MOT:
- 1
Test all headlights work and aim is correct - check for condensation inside
Lighting – Common fail on this model
- 2
Push down on each corner and release - car should bounce once only
Suspension – Common fail on this model
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Frequently Asked Questions
Is a 1977 Triumph S likely to fail its MOT?
Based on DVSA statistics, the 1977 Triumph S has a 78.6% 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 S?
The most common MOT failure reasons for a 1977 Triumph S are: the aim of a headlamp is not within limits laid down in the requirements, a shock absorber bush excessively worn, 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 Triumph S fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: the aim of a headlamp is not within limits laid down in the requirements, a shock absorber bush excessively worn, 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 Triumph Ss fail their MOT?
Around 21% of 1977 Triumph Ss fail their MOT test, meaning roughly 1 in 5 don't pass first time. The most common reasons are the aim of a headlamp is not within limits laid down in the requirements and a shock absorber bush excessively worn. Pre-checking these items can significantly improve your chances.
What should I check before my 1977 Triumph S MOT?
Before your 1977 Triumph S MOT, check these commonly-failed items: the aim of a headlamp is not within limits laid down in the requirements, a shock absorber bush excessively worn, 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 Triumph S reliable for MOT?
With a 78.6% MOT pass rate, the 1977 Triumph S performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.