DVSA Statistics
1977 Triumph Tr4a
MOT Pass Rate & Pre-MOT Checklist
There isn't much MOT data yet for the 1977 Triumph Tr4a (only 2 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 2 DVSA anonymised MOT tests · About this data
Pass Rate
50%
Lower 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 2 recorded tests.
Pre-MOT Checklist for 1977 Triumph Tr4a
Based on common failure points for this model, check these items before your MOT:
- 1
Check for excessive play in steering wheel - should be minimal free movement
Steering – Common fail on this model
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Frequently Asked Questions
Is a 1977 Triumph Tr4a likely to fail its MOT?
Based on DVSA statistics, the 1977 Triumph Tr4a has a 50% MOT pass rate. This is below average, so extra pre-MOT checks are recommended.
What are the most common MOT failures on a 1977 Triumph Tr4a?
The most common MOT failure reasons for a 1977 Triumph Tr4a are: steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, steering rack gaiter or ball joint dust cover damaged or deteriorated, 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 Tr4a fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, steering rack gaiter or ball joint dust cover damaged or deteriorated, 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 Tr4as fail their MOT?
Around 50% of 1977 Triumph Tr4as fail their MOT test, meaning roughly 1 in 2 don't pass first time. The most common reasons are steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc and steering rack gaiter or ball joint dust cover damaged or deteriorated. Pre-checking these items can significantly improve your chances.
What should I check before my 1977 Triumph Tr4a MOT?
Before your 1977 Triumph Tr4a MOT, check these commonly-failed items: steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, steering rack gaiter or ball joint dust cover damaged or deteriorated, 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 Tr4a reliable for MOT?
With a 50% MOT pass rate, the 1977 Triumph Tr4a performs below average compared to typical vehicles. Extra attention to pre-MOT checks is recommended for this model.