At a Glance
The Triumph 1500 has 3 identified common problems across 1 generation, with the 1500 (1970-1976) being the most affected generation and suspension the most common problem category. Based on 1K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on a specific model than the UK average — confirmed at 99% statistical confidence. Read our DVSA MOT data methodology →
Below: generation-by-generation comparison of Triumph 1500 common problems, MOT failure types, and pass-rate data drawn from DVSA records. Click any generation to see fuel- and engine-specific fault patterns, mileage-banded repair guidance, and the most common MOT failures testers record.
MOT Tests & Failures by Generation
Triumph 1500 generations by MOT tests, failures, and identified problems from DVSA data
Hover over each bar for a full breakdown. Tap any bar to view that generation's problems.
Showing total MOT tests, failures, and known problems per make. Hover over each bar for a full breakdown.
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Browse Triumph 1500 Generations
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Most Common Triumph 1500 MOT Failures
Every reason Triumph 1500 vehicles fail their MOT, ranked by frequency. Select an individual year to see only that year’s failures, or stay on ‘All time’ for the combined picture across our 20 years of DVSA data. Scroll inside the table for the full list.
| # | Failure | % of failures |
|---|---|---|
| 1 | Brake performance below minimum | 13.51% |
| 2 | Headlamp aim defect | 5.70% |
| 3 | Suspension joint or bush worn | 5.37% |
| 4 | Brake hydraulic component worn | 5.29% |
| 5 | Exhaust system fault | 4.96% |
| 6 | Driveshaft fault | 3.91% |
| 7 | Indicator fault | 3.91% |
| 8 | Stop lamp not working | 3.25% |
| 9 | Chassis condition | 3.17% |
| 10 | Steering rack fault | 3.17% |
| 11 | Tyre condition | 2.93% |
| 12 | Wiper blades deteriorated | 2.93% |
| 13 | Track rod end worn | 2.85% |
| 14 | Body corrosion or damage | 2.20% |
| 15 | Tyre tread depth below limit | 2.20% |
| 16 | Shock absorber worn or leaking | 2.12% |
| 17 | Front suspension fault | 1.95% |
| 18 | Front suspension joint worn | 1.95% |
| 19 | Horn not working | 1.87% |
| 20 | Exhaust emissions above threshold (non-catalyst) | 1.63% |
| 21 | Rear suspension fault | 1.55% |
| 22 | Steering coupling worn | 1.30% |
| 23 | Front lamp not working | 1.22% |
| 24 | Steering column fault | 1.22% |
| 25 | Parking brake performance below minimum | 1.06% |
| 26 | Rear lamp not working | 1.06% |
| 27 | Steering free play excessive | 1.06% |
| 28 | Spring mounting corroded | 0.98% |
| 29 | Number plate lamp not working | 0.81% |
| 30 | Parking brake condition | 0.81% |
| 31 | Windscreen washer not working | 0.81% |
| 32 | Ball joint dust cover split | 0.73% |
| 33 | Brake pedal movement restricted | 0.65% |
| 34 | Fuel pipe corroded or damaged | 0.65% |
| 35 | Position lamp not working | 0.65% |
| 36 | Subframe mounting corroded | 0.65% |
| 37 | Mirror damaged or missing | 0.57% |
| 38 | Steering arm worn | 0.57% |
| 39 | Brake pads or linings worn | 0.49% |
| 40 | Headlamp fault | 0.49% |
| 41 | Seat belt condition | 0.49% |
| 42 | Suspension mounting corroded | 0.49% |
| 43 | Brake fluid leak | 0.41% |
| 44 | Electrical switch fault | 0.41% |
| 45 | Steering operation fault | 0.41% |
| 46 | Brake disc or drum worn | 0.33% |
| 47 | Electrical wiring fault | 0.33% |
| 48 | Handbrake cable fault | 0.33% |
| 49 | Steering shaft fault | 0.33% |
| 50 | Wheel bearing worn | 0.33% |
| 51 | King pin or swivel pin worn | 0.33% |
| 52 | Battery loose or leaking | 0.24% |
| 53 | Brake wheel cylinder fault | 0.24% |
| 54 | Fuel cap damaged or missing | 0.24% |
| 55 | Rigid brake pipe corroded or damaged | 0.24% |
| 56 | Subframe corrosion or damage | 0.24% |
| 57 | Trailing arm worn or corroded | 0.24% |
| 58 | Brake caliper fault | 0.16% |
| 59 | Brake lever fault | 0.16% |
| 60 | Flexible brake hose damaged | 0.16% |
| 61 | Spark ignition emissions above threshold | 0.16% |
| 62 | Steering lock fault | 0.16% |
| 63 | Torque or reaction arm worn | 0.16% |
| 64 | Vehicle floor corroded | 0.16% |
| 65 | Brake back plate corroded or damaged | 0.08% |
| 66 | Brake cable, rod, lever or linkage fault | 0.08% |
| 67 | CV joint worn | 0.08% |
| 68 | Drag link end worn | 0.08% |
| 69 | Engine oil leak | 0.08% |
| 70 | Fog lamp not working | 0.08% |
| 71 | Fuel tank corroded or leaking | 0.08% |
| 72 | Handbrake lever fault | 0.08% |
| 73 | Steering wheel damaged or insecure | 0.08% |
| 74 | Suspension retaining or locking device fault | 0.08% |
| 75 | Tyre size or type not matched | 0.08% |
| 76 | Universal joint worn | 0.08% |
| 77 | Vehicle structure corrosion | 0.08% |
Showing all 77 reasons — scroll inside the table for the full list.
Triumph 1500 MOT Failures by Category
Total MOT failure occurrences for the Triumph 1500, grouped by category. Same data as the failures table above — just sliced by category instead of fault title. Hover a slice for the top failures in each category.
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Frequently Asked Questions
What are the most common Triumph 1500 problems?
Based on analysis of 1K Triumph 1500 MOT tests from DVSA data, we have 3 identified common problems across 1 generation. The most frequently flagged issue is "Suspension component mounting corroded". Suspension is the most common problem category.
Which Triumph 1500 generation has the most problems?
The Triumph 1500 1500 (1970-1976) (1970–1976) has the highest number of identified common problems (4). Click the generation card above for the full breakdown.
How is this data calculated?
We analyse anonymised DVSA MOT test records under the Open Government Licence. An issue is classified as a "Common Problem" when it occurs significantly more often on a specific model than the UK average, confirmed at 99% statistical confidence. Read the full methodology page for details.
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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