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Triumph reliability and common MOT problems by model

Triumph shows a 5.6% combined MOT failure rate across 83,093 tests in Motintel data. Bonneville has one of the lower high-confidence rates at 4.2%. Bonneville T 100 865 deserves extra checking at 5.2%.

Data sources: DVSA MOT records, official recall records, and MOT fault wording snapshots (2026-04-27, 2026-04-29, rfr_codes_2025-05-12, failure items 2023). Search-indexed model pages must clear 20,000 MOT tests and 10,000 vehicles.

Most reliable Triumph models in MOT data

#	Model	MOT failure rate	Tests	Vehicles
Not enough high-confidence model reports are available yet.

Triumph models with the highest MOT failure rates

#	Model	MOT failure rate	Tests	Vehicles
Not enough high-confidence model reports are available yet.

Common Triumph MOT problem areas

#	Problem area	MOT notes	Models affected	What to check	High-rate examples
Not enough high-confidence problem-area data is available yet.

All Triumph model reports

Model	MOT tests	Vehicles	Failure rate
Bonneville limited data	18,868	17,669	4.2%
Tiger limited data	17,848	16,684	5.3%
Sprint limited data	6,445	5,854	8.2%
Speed Triple limited data	5,597	5,088	6.6%
Street limited data	5,173	4,792	3.7%
Daytona limited data	4,612	4,241	7.8%
S limited data	3,682	3,419	4.5%
Thunderbird limited data	3,218	2,999	5.0%
Speed limited data	3,044	2,862	4.2%
Thruxton limited data	2,842	2,674	4.1%
Street Triple limited data	2,805	2,616	6.3%
Street Triple R limited data	1,706	1,564	6.5%
Trophy limited data	1,688	1,520	8.3%
Unclassified limited data	1,169	1,075	6.9%
Stag limited data	1,126	960	14.4%
Scrambler limited data	1,091	1,016	3.6%
Tr6 limited data	1,090	962	12.0%
Bonneville T 100 865 limited data	1,089	1,009	5.2%

Models with limited data (fewer than 20,000 tests or 10,000 vehicles) have full reports but are not indexed in search engines until the evidence threshold is met.