Triumph TR3A Reliability, MOT Pass Rate & Common Faults
Free Triumph TR3A car check
Is the Triumph TR3A reliable? We analysed 1,111 real MOT tests across 133 vehicles to find out.
Got a specific Triumph TR3A? Enter the reg for a free check:
The Triumph TR3A is above average for reliability based on real UK MOT data. Common problems include windscreen washer provides insufficient washer liquid, stop lamp not working and headlamp not working on dipped beam. Here's everything you need to know before buying a used Triumph TR3A.
Triumph TR3A Number Plates
Number plates registered to a Triumph TR3A. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Triumph TR3A MOT Pass Rate by Year
How likely is a Triumph TR3A to pass its MOT? Here's the pass rate for each registration year, newest first.
Triumph TR3A Problems — What Goes Wrong?
The most common reasons a Triumph TR3A fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Triumph TR3A Mileage — What's Normal?
How many miles does a typical Triumph TR3A owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Triumph TR3A MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Triumph TR3A year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2002 | 56 | 91.1% | 6,894 | 19,068 | 27,570 |
| 1960 | 311 | 88.1% | 10,439 | 20,775 | 42,388 |
| 1959 | 140 | 88.6% | 8,794 | 23,744 | 64,198 |
| 1958 | 99 | 89.9% | 27,843 | 43,433 | 64,422 |
How Long Does a Triumph TR3A Last?
Based on 133 Triumph TR3A vehicles on UK roads.
Triumph TR3A Mileage Distribution
Total mileage recorded across all Triumph TR3A MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Triumph TR3A
Based on MOT pass rates across all registration years with sufficient test data.
91.1% MOT pass rate from 56 tests
88.1% MOT pass rate from 311 tests
The best year to buy a used Triumph TR3A is 2002, which has the highest MOT pass rate at 91.1% across 56 tests. The 1960 model year has the lowest pass rate at 88.1% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Triumph TR3A Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Triumph TR3A THIS CAR | 88.8% | 1,111 | 24,643 mi | 68 yrs |
| Triumph Bonneville | 90.1% | 235,206 | 7,823 mi | 53 yrs |
| Triumph Tiger | 90.6% | 196,853 | 17,026 mi | 32 yrs |
| Triumph Sprint | 87.3% | 158,613 | 21,242 mi | 33 yrs |
| Moto Roma Virage 125 | 72.9% | 1,087 | 6,710 mi | 26 yrs |
Compared to the Triumph Bonneville (90.1% pass rate) and the Triumph Tiger (90.6% pass rate), the Triumph TR3A trails behind on MOT reliability.
Found a Triumph TR3A you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Triumph TR3AShould you buy a used Triumph TR3A?
The Triumph TR3A has an overall MOT pass rate of 88.8% across 1,111 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Triumph TR3A are windscreen washer provides insufficient washer liquid (22 recorded failures), stop lamp not working (10), and headlamp not working on dipped beam (8). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Triumph TR3A owner drives around 540 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Triumph TR3A models stay on UK roads for around 68 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.