At a Glance
The Triumph Tr6 has 23 identified common problems across 1 generation, with the TR6 (1968-1976) being the most affected generation and suspension the most common problem category. Based on 48K 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 Tr6 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 Tr6 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 Tr6 Generations
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Most Common Triumph Tr6 MOT Failures
Every reason Triumph Tr6 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 | 7.90% |
| 2 | Suspension joint or bush worn | 6.36% |
| 3 | Number plate lamp not working | 5.16% |
| 4 | Windscreen washer not working | 4.83% |
| 5 | Front suspension fault | 4.33% |
| 6 | Suspension mounting corroded | 4.25% |
| 7 | Stop lamp not working | 3.76% |
| 8 | Exhaust system fault | 3.38% |
| 9 | Rear suspension fault | 3.08% |
| 10 | Headlamp aim defect | 3.04% |
| 11 | Body corrosion or damage | 3.03% |
| 12 | Front lamp not working | 3.01% |
| 13 | Chassis condition | 2.91% |
| 14 | Wiper blades deteriorated | 2.88% |
| 15 | Tyre condition | 2.71% |
| 16 | Tyre tread depth below limit | 2.24% |
| 17 | Steering rack fault | 1.87% |
| 18 | Headlamp fault | 1.66% |
| 19 | Parking brake performance below minimum | 1.64% |
| 20 | Track rod end worn | 1.63% |
| 21 | Position lamp not working | 1.60% |
| 22 | Seat belt condition | 1.57% |
| 23 | Indicator fault | 1.55% |
| 24 | Shock absorber worn or leaking | 1.26% |
| 25 | Rear lamp not working | 1.19% |
| 26 | Brake hydraulic component worn | 1.13% |
| 27 | Wheel bearing worn | 1.08% |
| 28 | Battery loose or leaking | 0.92% |
| 29 | Brake pedal fault | 0.91% |
| 30 | Parking brake condition | 0.87% |
| 31 | Horn not working | 0.87% |
| 32 | Ball joint dust cover split | 0.83% |
| 33 | Brake disc or drum worn | 0.82% |
| 34 | Steering operation fault | 0.64% |
| 35 | Brake pads or linings worn | 0.60% |
| 36 | Electrical switch fault | 0.60% |
| 37 | Driveshaft fault | 0.59% |
| 38 | Front suspension joint worn | 0.58% |
| 39 | Steering column fault | 0.52% |
| 40 | Steering free play excessive | 0.52% |
| 41 | Mirror damaged or missing | 0.51% |
| 42 | Suspension linkage fault | 0.48% |
| 43 | Exhaust emissions above threshold (non-catalyst) | 0.44% |
| 44 | Fuel cap damaged or missing | 0.44% |
| 45 | Suspension retaining or locking device fault | 0.43% |
| 46 | Fuel pipe corroded or damaged | 0.41% |
| 47 | Steering lock fault | 0.41% |
| 48 | Steering wheel damaged or insecure | 0.37% |
| 49 | Brake pedal movement restricted | 0.34% |
| 50 | Brake caliper fault | 0.29% |
| 51 | Brake master cylinder or servo mounting fault | 0.29% |
| 52 | Coil spring broken or corroded | 0.29% |
| 53 | Spark ignition emissions above threshold | 0.29% |
| 54 | King pin or swivel pin worn | 0.29% |
| 55 | Dashboard warning lamp fault | 0.26% |
| 56 | Subframe mounting corroded | 0.26% |
| 57 | Driver seat fault | 0.25% |
| 58 | Steering shaft fault | 0.25% |
| 59 | Electrical wiring fault | 0.23% |
| 60 | Suspension arm worn or corroded | 0.23% |
| 61 | Vehicle structure corrosion | 0.23% |
| 62 | Brake fluid leak | 0.22% |
| 63 | Boot lid damaged or insecure | 0.21% |
| 64 | Rigid brake pipe corroded or damaged | 0.21% |
| 65 | Spring mounting corroded | 0.21% |
| 66 | Bonnet catch or hinge fault | 0.21% |
| 67 | Steering coupling worn | 0.20% |
| 68 | Windscreen damage affecting view | 0.19% |
| 69 | Brake air or vacuum system fault | 0.18% |
| 70 | Passenger seat fault | 0.18% |
| 71 | Speedometer fault | 0.15% |
| 72 | Tyre size or type not matched | 0.15% |
| 73 | Anti-roll bar worn or corroded | 0.14% |
| 74 | Brake wheel cylinder fault | 0.14% |
| 75 | Fuel hose damaged or leaking | 0.14% |
| 76 | Steering arm worn | 0.14% |
| 77 | Rear reflector damaged or missing | 0.12% |
| 78 | Engine oil leak | 0.11% |
| 79 | Flexible brake hose damaged | 0.11% |
| 80 | Drag link end worn | 0.10% |
| 81 | Dip switch fault | 0.10% |
| 82 | Body security fault | 0.09% |
| 83 | Indicator warning light fault | 0.09% |
| 84 | Universal joint worn | 0.07% |
| 85 | Brake lever fault | 0.06% |
| 86 | Fuel tank corroded or leaking | 0.06% |
| 87 | Hydraulic brake cylinder fault | 0.06% |
| 88 | Front passenger door fault | 0.06% |
| 89 | Radius arm worn or corroded | 0.06% |
| 90 | Steering intermediate drop arm worn | 0.06% |
| 91 | Engine mounting worn or broken | 0.05% |
| 92 | Subframe corrosion or damage | 0.05% |
| 93 | Transmission oil leak | 0.05% |
| 94 | Brake pressure or vacuum buildup insufficient | 0.04% |
| 95 | Brake servo fault | 0.04% |
| 96 | Trailing arm worn or corroded | 0.04% |
| 97 | Brake back plate corroded or damaged | 0.03% |
| 98 | Driver door fault | 0.03% |
| 99 | Handbrake cable fault | 0.03% |
| 100 | Steering lock stop fault | 0.03% |
| 101 | Suspension unit fault | 0.03% |
| 102 | Wheel hub fault | 0.03% |
| 103 | Brake linkage mounting fault | 0.02% |
| 104 | Exhaust leak | 0.02% |
| 105 | Propshaft fault | 0.02% |
| 106 | Tyre valve stem damaged | 0.02% |
| 107 | Axle beam corroded or cracked | 0.02% |
| 108 | Brake cable, rod, lever or linkage fault | 0.02% |
| 109 | Brake clevis joint worn | 0.02% |
| 110 | Brake pedal linkage fault | 0.02% |
| 111 | Brake valve fault | 0.02% |
| 112 | Fog lamp not working | 0.02% |
| 113 | Hydraulic fluid leak | 0.02% |
| 114 | Semaphore indicator fault | 0.02% |
| 115 | Steering box fault | 0.02% |
| 116 | Stub axle worn | 0.02% |
| 117 | Tie bar or rod worn or corroded | 0.02% |
| 118 | Vehicle floor corroded | 0.02% |
| 119 | Bonded suspension condition | 0.02% |
| 120 | Towbar fault | 0.02% |
| 121 | Axle corroded or damaged | <0.01% |
| 122 | Brake fluid warning light on | <0.01% |
| 123 | Brake master cylinder fault | <0.01% |
| 124 | Brake slack adjuster fault | <0.01% |
| 125 | Brake stationary pin worn | <0.01% |
| 126 | Catalytic converter efficiency low | <0.01% |
| 127 | Compression ignition emissions above threshold | <0.01% |
| 128 | Hand-operated brake valve condition | <0.01% |
| 129 | Handbrake lever fault | <0.01% |
| 130 | Main beam warning light fault | <0.01% |
| 131 | Power steering pipe or hose leaking | <0.01% |
| 132 | Spare wheel fault | <0.01% |
| 133 | Suspension linkage attachment bracket or mounting corroded | <0.01% |
| 134 | Tailgate damaged or insecure | <0.01% |
| 135 | Torsion bar worn or corroded | <0.01% |
| 136 | MacPherson strut worn | <0.01% |
Showing all 136 reasons — scroll inside the table for the full list.
Triumph Tr6 MOT Failures by Category
Total MOT failure occurrences for the Triumph Tr6, 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 Tr6 problems?
Based on analysis of 48K Triumph Tr6 MOT tests from DVSA data, we have 23 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 Tr6 generation has the most problems?
The Triumph Tr6 TR6 (1968-1976) (1968–1976) has the highest number of identified common problems (31). 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 Tr6?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Triumph Tr6 owners spot problems early. All submissions are reviewed before being added to the public database.
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