At a Glance
The Triumph Tr3 has 0 identified common problems across 1 generation and suspension the most common problem category. Based on 10K 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 Tr3 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 Tr3 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 Tr3 owners — report a problem and we'll add it to the database
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Browse Triumph Tr3 Generations
Select a generation to see its specific problems, MOT failures and advisories
Most Common Triumph Tr3 MOT Failures
Every reason Triumph Tr3 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 | 12.78% |
| 2 | Stop lamp not working | 8.07% |
| 3 | Windscreen washer not working | 7.97% |
| 4 | Indicator fault | 5.92% |
| 5 | Headlamp aim defect | 4.98% |
| 6 | Suspension joint or bush worn | 4.08% |
| 7 | Wiper blades deteriorated | 3.28% |
| 8 | Brake hydraulic component worn | 3.14% |
| 9 | Horn not working | 2.57% |
| 10 | Track rod end worn | 2.31% |
| 11 | Number plate lamp not working | 2.15% |
| 12 | Rear lamp not working | 2.10% |
| 13 | Front suspension fault | 1.91% |
| 14 | Position lamp not working | 1.63% |
| 15 | Steering rack fault | 1.63% |
| 16 | Front suspension joint worn | 1.58% |
| 17 | Exhaust system fault | 1.42% |
| 18 | Parking brake performance below minimum | 1.39% |
| 19 | Body corrosion or damage | 1.37% |
| 20 | Headlamp fault | 1.34% |
| 21 | Parking brake condition | 1.32% |
| 22 | Shock absorber worn or leaking | 1.25% |
| 23 | Tyre tread depth below limit | 1.20% |
| 24 | Front lamp not working | 1.11% |
| 25 | Suspension mounting corroded | 1.06% |
| 26 | Tyre condition | 1.04% |
| 27 | Chassis condition | 0.90% |
| 28 | Brake fluid leak | 0.78% |
| 29 | Brake pedal fault | 0.78% |
| 30 | Steering box fault | 0.78% |
| 31 | Fuel pipe corroded or damaged | 0.75% |
| 32 | Steering column fault | 0.75% |
| 33 | Battery loose or leaking | 0.68% |
| 34 | Ball joint dust cover split | 0.68% |
| 35 | Steering free play excessive | 0.66% |
| 36 | Steering operation fault | 0.59% |
| 37 | Spark ignition emissions above threshold | 0.57% |
| 38 | Drag link end worn | 0.54% |
| 39 | Seat belt condition | 0.54% |
| 40 | Wheel bearing worn | 0.54% |
| 41 | Flexible brake hose damaged | 0.52% |
| 42 | Rigid brake pipe corroded or damaged | 0.52% |
| 43 | Steering wheel damaged or insecure | 0.52% |
| 44 | Suspension retaining or locking device fault | 0.52% |
| 45 | Brake disc or drum worn | 0.42% |
| 46 | Steering coupling worn | 0.42% |
| 47 | Exhaust emissions above threshold (non-catalyst) | 0.40% |
| 48 | Spring mounting corroded | 0.35% |
| 49 | Steering lock fault | 0.35% |
| 50 | Brake caliper fault | 0.33% |
| 51 | Rear suspension fault | 0.33% |
| 52 | Suspension linkage fault | 0.33% |
| 53 | Body security fault | 0.31% |
| 54 | Steering arm worn | 0.31% |
| 55 | King pin or swivel pin worn | 0.31% |
| 56 | Brake pads or linings worn | 0.26% |
| 57 | Engine oil leak | 0.26% |
| 58 | Electrical switch fault | 0.24% |
| 59 | Fuel hose damaged or leaking | 0.24% |
| 60 | Brake lever fault | 0.21% |
| 61 | Brake pedal movement restricted | 0.21% |
| 62 | Driver seat fault | 0.21% |
| 63 | Fuel cap damaged or missing | 0.21% |
| 64 | Vehicle structure corrosion | 0.21% |
| 65 | Handbrake cable fault | 0.19% |
| 66 | Steering shaft fault | 0.19% |
| 67 | Suspension arm worn or corroded | 0.19% |
| 68 | Electrical wiring fault | 0.17% |
| 69 | Hydraulic brake cylinder fault | 0.17% |
| 70 | Mirror damaged or missing | 0.17% |
| 71 | Steering intermediate drop arm worn | 0.17% |
| 72 | Tyre size or type not matched | 0.17% |
| 73 | Windscreen damage affecting view | 0.17% |
| 74 | Brake wheel cylinder fault | 0.14% |
| 75 | Fuel tank corroded or leaking | 0.14% |
| 76 | Leaf spring broken or corroded | 0.14% |
| 77 | Brake cable, rod, lever or linkage fault | 0.12% |
| 78 | Brake clevis joint worn | 0.12% |
| 79 | Speedometer fault | 0.12% |
| 80 | Bonnet catch or hinge fault | 0.09% |
| 81 | Power steering pipe or hose leaking | 0.09% |
| 82 | Securing bolts missing or insecure | 0.09% |
| 83 | Subframe mounting corroded | 0.09% |
| 84 | Anchor bracket corroded | 0.07% |
| 85 | Coil spring broken or corroded | 0.07% |
| 86 | Driveshaft fault | 0.07% |
| 87 | Bonded suspension condition | 0.07% |
| 88 | Anti-roll bar worn or corroded | 0.05% |
| 89 | Brake back plate corroded or damaged | 0.05% |
| 90 | Brake master cylinder fault | 0.05% |
| 91 | Brake master cylinder or servo mounting fault | 0.05% |
| 92 | Handbrake lever fault | 0.05% |
| 93 | Passenger seat fault | 0.05% |
| 94 | Spring saddle corroded | 0.05% |
| 95 | Universal joint worn | 0.05% |
| 96 | Wheel hub fault | 0.05% |
| 97 | MacPherson strut worn | 0.05% |
| 98 | Boot lid damaged or insecure | 0.02% |
| 99 | Brake fluid reservoir fault | 0.02% |
| 100 | Brake servo fault | 0.02% |
| 101 | Brake slack adjuster fault | 0.02% |
| 102 | Brake valve fault | 0.02% |
| 103 | Dashboard warning lamp fault | 0.02% |
| 104 | Driver door fault | 0.02% |
| 105 | Fog lamp not working | 0.02% |
| 106 | Front passenger door fault | 0.02% |
| 107 | Halfshaft fault | 0.02% |
| 108 | Handbrake mechanism or mounting fault | 0.02% |
| 109 | Hydraulic fluid leak | 0.02% |
| 110 | Leaf spring eye worn or broken | 0.02% |
| 111 | Radius arm worn or corroded | 0.02% |
| 112 | Seat belt or padding damaged | 0.02% |
| 113 | Semaphore indicator fault | 0.02% |
| 114 | Tie bar or rod worn or corroded | 0.02% |
Showing all 114 reasons — scroll inside the table for the full list.
Triumph Tr3 MOT Failures by Category
Total MOT failure occurrences for the Triumph Tr3, 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 Tr3 problems?
Based on analysis of 10K Triumph Tr3 MOT tests from DVSA data, we have 0 identified common problems across 1 generation. Suspension is the most common problem category.
Which Triumph Tr3 generation has the most problems?
We haven't identified significant problem patterns specific to any single generation of the Triumph Tr3 yet — either this is a well-engineered model across all its generations, or the sample size per generation is still small. Check individual generation pages for MOT failure and advisory breakdowns.
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 Tr3?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Triumph Tr3 owners spot problems early. All submissions are reviewed before being added to the public database.
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