Most reliable Triumph: MOT failure rates ranked

Updated 05 September 2026.

8.0%

Triumph T120, the most reliable Triumph

The most reliable Triumph on MOT failure rate is the Triumph T120, at 8.0% failures across 5,655 tests.

Rank	Model	MOT failure rate	Tests
1	Triumph T120	8.0%	5,655
2	Triumph Scrambler	8.9%	8,186
3	Triumph Tiger	9.2%	288,223
4	Triumph Thruxton	9.4%	32,897
5	Triumph Rocket	9.5%	45,428
6	Triumph T100	9.6%	6,047
7	Triumph Bonneville	9.8%	305,248
8	Triumph Street	9.9%	119,782
9	Triumph Thunderbird	10.7%	81,236
10	Triumph S	10.7%	35,804
11	Triumph America	10.7%	6,491
12	Triumph Legend	11.6%	15,194
13	Triumph T140	11.9%	5,055
14	Triumph Speedmaster	12.2%	12,851
15	Triumph Speed	12.4%	169,414

Questions and answers

What is the most reliable Triumph at MOT?

The most reliable Triumph on MOT failure rate is the Triumph T120, at 8.0% failures across 5,655 tests.

Which Triumph fails its MOT most often?

The Triumph Acclaim has the highest MOT failure rate of the Triumph range, at 28.1%.