TRIUMPH T140 BONNEVILLE

744cc Petrol Class 2

#2792 of 5426 overall #154 of 175 TRIUMPHs #444 of 465 cruiser bikes

83.8%

first-time pass rate

8.3%

failed outright

20,019

median miles at test

253

MOT tests, 2005–2025

Pass rate by mileage

how the T140 BONNEVILLE's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage T140 BONNEVILLE passes first time 83.3% of the time; by 40k that's 82.5%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a T140 BONNEVILLE

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	14	36.8
brakes	9	23.7
steering and suspension	6	15.8
tyres and wheels	3	7.9
reg plates and vin	2	5.3
lamps and reflectors	1	2.6
drive system	1	2.6
structure and attachments	1	2.6
body and structure	1	2.6

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the T140 BONNEVILLE beats 0 of its 4 closest rivals (TRIUMPH BONNEVILLE, TRIUMPH THUNDERBIRD, HARLEY-DAVIDSON XLH 883).

TRIUMPH BONNEVILLE 89.0% pass · 195k tests TRIUMPH THUNDERBIRD 87.8% pass · 56.3k tests HARLEY-DAVIDSON XLH 883 87.4% pass · 41.2k tests HARLEY-DAVIDSON XL 87.9% pass · 18.5k tests

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the T140 BONNEVILLE.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 1978 (92.6% pass). Weakest: 1978 (92.6%).

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.