How reliable is the Triumph TR6 compared with other cars?

We do not publish a comparison for the Triumph TR6, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 84.7% across 943 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.

What do testers most often warn about on a Triumph TR6?

The most common advisory is "A wheel bearing with excessive play", noted on 10.2% of all Triumph TR6 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Triumph TR6 usually have at its MOT?

The average odometer reading recorded at test is 47,313 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Model reliability file

Triumph TR6 MOT pass rate & common failures

From 943 recorded MOT tests of the Triumph TR6, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 943 MOT tests, 84.7% of Triumph TR6 tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Triumph TR6 fleet does not yet cover a wide enough spread of ages and distances to compare it fairly against other models. Its most commonly recorded failure is windscreen washers not working or not providing sufficient fluid to clear the windscreen, which appears in 14.7% of failed tests. Cars of this model average 47,313 miles on the odometer when tested.

At a glance

Recorded pass rate

84.7%unadjusted, not comparable943 tests

We are not publishing a ranking for the TR6. The examples tested do not cover a wide enough spread of ages and mileages to compare it fairly, and an unadjusted pass rate mostly sorts models by how recently they were bought rather than how well they were built. The failure and advisory patterns below come from the same 943 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Triumph TR6 tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.Windscreen washers not working or not providing sufficient fluid to clear the windscreen14.7%
17 occurrencesWiper or washer not working properly explained
2.Parking brake efficiency below minimum requirement13.8%
16 occurrencesParking brake efficiency too low explained
3.Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle12.1%
14 occurrencesBrake binding or imbalanced across an axle explained
4.Wiper blade missing or obviously not clearing the windscreen12.1%
14 occurrencesWiper or washer not working properly explained
5.Windscreen washers not working or not providing sufficient fluid to clear the windscreen10.3%
12 occurrencesWiper or washer not working properly explained
6.A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED10.3%
12 occurrencesHeadlamp not working explained
7.A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED9.5%
11 occurrencesHeadlamp not working explained
8.A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning9.5%
11 occurrencesDirection indicator not working explained
9.Significant brake effort recorded with no brake applied indicating a binding brake7.8%
9 occurrencesBrake binding or imbalanced across an axle explained
10.The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired7.8%
9 occurrencesSuspension mounting corroded or insecure explained

Warnings without a failure

Most common advisories

Share of all Triumph TR6 tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.A wheel bearing with excessive play10.2%
96 testsWheel bearing has excessive play or is rough explained
2.Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users10.1%
95 tests
3.A suspension pin, bush or joint excessively worn4.5%
42 testsSuspension arm bush worn explained
4.Play in steering rack inner joint(s)3.1%
29 tests
5.Tyre tread depth not in accordance with the requirements2.4%
23 testsTyre worn close to the legal limit explained
6.Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users2.3%
22 tests
7.Significant brake effort recorded with no brake applied indicating a binding brake1.6%
15 testsBrake binding or imbalanced across an axle explained
8.A tyre seriously damaged1.2%
11 testsTyre damaged or deteriorated explained

The rest of the record

Everything else recorded on the Triumph TR6

The 22 other defects testers recorded on this model, beyond the most common listed above. Each links to what it means and what it takes to put right.

What gets tested

The TR6 fleet

Average mileage recorded at test: 47,313
Fuel mix of tested cars: Petrol100.0%

Check a specific Triumph TR6

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other Triumph models

Triumph Stag — 81.8% unadjusted
All Triumph models

Common questions

How reliable is the Triumph TR6 compared with other cars?: We do not publish a comparison for the Triumph TR6, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 84.7% across 943 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.
What is the most common MOT failure on a Triumph TR6?: The item recorded most often is "Windscreen washers not working or not providing sufficient fluid to clear the windscreen", which appears in 14.7% of failed Triumph TR6 tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a Triumph TR6?: The most common advisory is "A wheel bearing with excessive play", noted on 10.2% of all Triumph TR6 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Triumph TR6 usually have at its MOT?: The average odometer reading recorded at test is 47,313 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. No adjusted rate is shown because this model's tested examples do not cover enough of the national age and mileage range for standardisation to mean anything.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.