DVSA Statistics
1978 Triumph Bonneville
MOT Pass Rate & Pre-MOT Checklist
There isn't much MOT data yet for the 1978 Triumph Bonneville (only 10 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 10 DVSA anonymised MOT tests · About this data
Pass Rate
90%
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 10 recorded tests.
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Frequently Asked Questions
Is a 1978 Triumph Bonneville likely to fail its MOT?
Based on DVSA statistics, the 1978 Triumph Bonneville has a 90% 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 Triumph Bonneville?
The most common MOT failure reasons for a 1978 Triumph Bonneville are: a lamp missing or inoperative. 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 Triumph Bonneville fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: a lamp missing or inoperative. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1978 Triumph Bonnevilles fail their MOT?
Around 10% of 1978 Triumph Bonnevilles fail their MOT test, meaning roughly 1 in 10 don't pass first time. The most common reasons are a lamp missing or inoperative. Pre-checking these items can significantly improve your chances.
What should I check before my 1978 Triumph Bonneville MOT?
Before your 1978 Triumph Bonneville MOT, check these commonly-failed items: a lamp missing or inoperative. 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 Triumph Bonneville reliable for MOT?
With a 90% MOT pass rate, the 1978 Triumph Bonneville performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.