At a Glance
The Triumph 1500 has 3 identified problems that occur more often than the UK average, with Suspension component mounting corroded being the most reported. Brakes is the most common MOT failure category. Based on 1K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Triumph 1500 — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Triumph 1500 MOT Pass Rate
Across 1K MOT tests from DVSA data, the Triumph 1500 (1970–1976) has a fail rate of 33.2%.
All-time UK average fail rate: 34.9%
Common Triumph 1500 Problems
Owner-submitted reports plus patterns we've identified across 559 million UK MOT tests. Each MOT-derived item below — whether tagged as a Problem, Wear & Tear or Consumable — shows up noticeably more often on this generation than across the UK fleet, which is why it's here. Owner reports are pinned to the top by default; use the sort and filter pills below to view a specific tier or change the order.
Suspension component mounting corroded
87
occurrences
Windscreen washer not working
81
occurrences
Subframe mounting corroded
53
occurrences
Tell Us About Your Problem
Help other Triumph 1500 owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Triumph 1500 owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Triumph 1500, grouped by the mileage they typically appear at.
170 distinct problems · 2,357 total occurrences in current filter
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Frequently Asked Questions
What are the most common Triumph 1500 problems?
Based on DVSA MOT data for the Triumph 1500 1500 (1970–1976), we have identified 3 common problems. The most frequently reported is "Suspension component mounting corroded". Brakes is the most common MOT failure category.
How reliable is the Triumph 1500?
This generation has 1K MOT tests on record with a 33.2% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Triumph 1500?
There are 81 distinct MOT failure types recorded for the 1500 (1970–1976), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Triumph 1500?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Triumph 1500 owners spot problems early. All submissions are reviewed before being added to the public database.
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