Triumph T150 Reliability, MOT Pass Rate & Common Faults
Free Triumph T150 car check
Is the Triumph T150 reliable? We analysed 865 real MOT tests across 153 vehicles to find out.
Got a specific Triumph T150? Enter the reg for a free check:
The Triumph T150 is above average for reliability based on real UK MOT data. Common problems include steering headbearing has excessive free play, tyre tread depth is below minimum requirements of 1.0mm and stop lamp does not illuminate immediately a brake applies. Here's everything you need to know before buying a used Triumph T150.
Triumph T150 Number Plates
Number plates registered to a Triumph T150. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Triumph T150 MOT Pass Rate by Year
How likely is a Triumph T150 to pass its MOT? Here's the pass rate for each registration year, newest first.
Triumph T150 Problems — What Goes Wrong?
The most common reasons a Triumph T150 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Triumph T150 Mileage — What's Normal?
How many miles does a typical Triumph T150 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Triumph T150 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Triumph T150 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 1992 | 50 | 94.0% | 6,936 | 20,136 | 25,946 |
| 1975 | 125 | 88.0% | 11,566 | 21,516 | 34,418 |
| 1974 | 65 | 89.2% | 18,445 | 27,850 | 35,278 |
| 1973 | 127 | 91.3% | 22,436 | 26,508 | 39,504 |
| 1972 | 95 | 82.1% | 14,458 | 24,117 | 37,584 |
How Long Does a Triumph T150 Last?
Based on 153 Triumph T150 vehicles on UK roads.
Triumph T150 Mileage Distribution
Total mileage recorded across all Triumph T150 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 T150
Based on MOT pass rates across all registration years with sufficient test data.
94.0% MOT pass rate from 50 tests
82.1% MOT pass rate from 95 tests
The best year to buy a used Triumph T150 is 1992, which has the highest MOT pass rate at 94.0% across 50 tests. The 1972 model year has the lowest pass rate at 82.1% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Triumph T150 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Triumph T150 THIS CAR | 90.1% | 865 | 20,290 mi | 54 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 |
| Chevrolet El Camino | 84.1% | 571 | 47,380 mi | 39 yrs |
Compared to the Triumph Bonneville (90.1% pass rate) and the Triumph Tiger (90.6% pass rate), the Triumph T150 sits in the middle of the pack on MOT reliability.
Found a Triumph T150 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 T150Should you buy a used Triumph T150?
The Triumph T150 has an overall MOT pass rate of 90.1% across 865 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 T150 are steering headbearing has excessive free play (4 recorded failures), tyre tread depth is below minimum requirements of 1.0mm (4), and stop lamp does not illuminate immediately a brake applies (3). 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 T150 owner drives around 214 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 T150 models stay on UK roads for around 54 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.