At a Glance
The Triumph 2500 has 6 identified common problems across 1 generation, with the 2500 (1974-1977) being the most affected generation and suspension the most common problem category. Based on 3K 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 2500 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 2500 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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Tell Us About Your Problem
Help other Triumph 2500 owners — report a problem and we'll add it to the database
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Most Common Triumph 2500 MOT Failures
Every reason Triumph 2500 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 | Headlamp aim defect | 7.00% |
| 2 | Suspension joint or bush worn | 5.81% |
| 3 | Stop lamp not working | 5.14% |
| 4 | Brake hydraulic component worn | 4.84% |
| 5 | Exhaust system fault | 4.78% |
| 6 | Wiper blades deteriorated | 4.58% |
| 7 | Body corrosion or damage | 4.53% |
| 8 | Track rod end worn | 4.32% |
| 9 | Brake performance below minimum | 4.17% |
| 10 | Chassis condition | 4.17% |
| 11 | Indicator fault | 3.81% |
| 12 | Number plate lamp not working | 3.19% |
| 13 | Front suspension fault | 2.67% |
| 14 | Tyre condition | 2.42% |
| 15 | Rear lamp not working | 2.21% |
| 16 | Tyre tread depth below limit | 2.11% |
| 17 | Front suspension joint worn | 2.01% |
| 18 | Seat belt condition | 1.70% |
| 19 | Suspension mounting corroded | 1.59% |
| 20 | Rear suspension fault | 1.54% |
| 21 | Shock absorber worn or leaking | 1.54% |
| 22 | Steering column fault | 1.54% |
| 23 | Horn not working | 1.23% |
| 24 | Steering rack fault | 1.18% |
| 25 | Parking brake condition | 1.13% |
| 26 | Windscreen washer not working | 1.13% |
| 27 | Spark ignition emissions above threshold | 1.08% |
| 28 | Steering coupling worn | 1.08% |
| 29 | Exhaust emissions above threshold (non-catalyst) | 1.03% |
| 30 | Brake fluid leak | 0.98% |
| 31 | Spring mounting corroded | 0.87% |
| 32 | Front lamp not working | 0.77% |
| 33 | Position lamp not working | 0.77% |
| 34 | Brake pedal movement restricted | 0.72% |
| 35 | Electrical switch fault | 0.72% |
| 36 | Subframe mounting corroded | 0.62% |
| 37 | Parking brake performance below minimum | 0.51% |
| 38 | Steering free play excessive | 0.51% |
| 39 | Brake disc or drum worn | 0.41% |
| 40 | Tyre size or type not matched | 0.41% |
| 41 | Vehicle structure corrosion | 0.41% |
| 42 | Battery loose or leaking | 0.36% |
| 43 | Brake pads or linings worn | 0.36% |
| 44 | Fuel pipe corroded or damaged | 0.36% |
| 45 | Steering arm worn | 0.36% |
| 46 | Ball joint dust cover split | 0.36% |
| 47 | Driveshaft fault | 0.31% |
| 48 | Fuel cap damaged or missing | 0.31% |
| 49 | Headlamp fault | 0.31% |
| 50 | Power steering pipe or hose leaking | 0.31% |
| 51 | Wheel bearing worn | 0.31% |
| 52 | MacPherson strut worn | 0.31% |
| 53 | Brake clevis joint worn | 0.26% |
| 54 | Brake lever fault | 0.26% |
| 55 | Subframe corrosion or damage | 0.26% |
| 56 | Coil spring broken or corroded | 0.21% |
| 57 | Fuel hose damaged or leaking | 0.21% |
| 58 | Mirror damaged or missing | 0.21% |
| 59 | Steering operation fault | 0.21% |
| 60 | Steering shaft fault | 0.21% |
| 61 | Windscreen damage affecting view | 0.21% |
| 62 | Brake master cylinder or servo mounting fault | 0.15% |
| 63 | Handbrake cable fault | 0.15% |
| 64 | Handbrake mechanism or mounting fault | 0.15% |
| 65 | Power steering ram fault | 0.15% |
| 66 | Radius arm worn or corroded | 0.15% |
| 67 | Rear reflector damaged or missing | 0.15% |
| 68 | Steering wheel damaged or insecure | 0.15% |
| 69 | Suspension arm worn or corroded | 0.15% |
| 70 | Vehicle floor corroded | 0.15% |
| 71 | Brake back plate corroded or damaged | 0.10% |
| 72 | Brake cable, rod, lever or linkage fault | 0.10% |
| 73 | Brake pedal fault | 0.10% |
| 74 | Brake wheel cylinder fault | 0.10% |
| 75 | Electrical wiring fault | 0.10% |
| 76 | Engine mounting worn or broken | 0.10% |
| 77 | Rigid brake pipe corroded or damaged | 0.10% |
| 78 | Air brake cylinder or actuator fault | 0.05% |
| 79 | Anti-roll bar worn or corroded | 0.05% |
| 80 | Brake air or vacuum system fault | 0.05% |
| 81 | Brake caliper fault | 0.05% |
| 82 | Brake linkage mounting fault | 0.05% |
| 83 | Catalytic converter efficiency low | 0.05% |
| 84 | Dashboard warning lamp fault | 0.05% |
| 85 | Drag link end worn | 0.05% |
| 86 | Fog lamp not working | 0.05% |
| 87 | Fuel tank corroded or leaking | 0.05% |
| 88 | Hand-operated brake valve condition | 0.05% |
| 89 | Handbrake lever fault | 0.05% |
| 90 | Spare wheel fault | 0.05% |
| 91 | Steering intermediate drop arm worn | 0.05% |
| 92 | Suspension retaining or locking device fault | 0.05% |
| 93 | Torsion bar worn or corroded | 0.05% |
| 94 | Bonded suspension condition | 0.05% |
| 95 | Suspension linkage fault | 0.05% |
| 96 | Towbar fault | 0.05% |
Showing all 96 reasons — scroll inside the table for the full list.
Triumph 2500 MOT Failures by Category
Total MOT failure occurrences for the Triumph 2500, 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 2500 problems?
Based on analysis of 3K Triumph 2500 MOT tests from DVSA data, we have 6 identified common problems across 1 generation. The most frequently flagged issue is "Brake performance below minimum". Suspension is the most common problem category.
Which Triumph 2500 generation has the most problems?
The Triumph 2500 2500 (1974-1977) (1974–1977) has the highest number of identified common problems (8). 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 2500?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Triumph 2500 owners spot problems early. All submissions are reviewed before being added to the public database.
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