MOT reliability

Triumph Bonneville bobber

1,400 vehicles · 1,326 completed MOT tests analysed

91%

MOT pass rate

Based on 1,400 Triumph Bonneville bobber vehicles and 1,326 completed MOT tests, the Triumph Bonneville bobber has an overall 91% pass rate, with an average recorded mileage of 4,372 miles.

1,400

Vehicles

1,326

MOT tests

1,017

Avg miles / year

0.3

Faults per test

Dangerous-fault share

Triumph Bonneville bobber problem areas

Where faults occur most across all Triumph Bonneville bobber MOT tests:

Emissions & nuisance33%
Lamps & electrical29%
Brakes18%
Tyres, wheels & suspension14%
Identification & plates7%
Body & structure7%
Other7%
Steering5%

Triumph Bonneville bobber pass rate by age

How the Triumph Bonneville bobber's MOT pass rate changes as it ages (buckets with 20+ tests).

Age (years)	Tests	Pass rate
2	23	96%
3	635	90%
4	398	91%
5	116	94%
6	28	96%
7	33	88%
8	28	96%
9	17	94%
10	9	78%

Fuel types: Petrol (1,390), Other (10)

Most common Triumph Bonneville bobber MOT faults

These are the faults and advisories recorded most often across Triumph Bonneville bobber MOT tests:

Exhaust noisy (8.1.1 (a)) (95 times)
Rear reflector missing (4.8.2 (a) (ii)) (27 times)
Headlamp aim too high (4.1.2 (a)) (22 times)
Rear Tyre worn close to the legal limit (5.2.3 (e)) (22 times)
Drive chain slightly loose (6.1.7 (c) (i)) (16 times)
Registration plate does not conform to the specified requirements (0.1 (d)) (14 times)
Rear Brake pad(s) close to minimum limit (1.1.13 (a)) (14 times)
Front Brake pad(s) close to minimum limit (1.1.13 (a)) (11 times)
Front Brake indicates slight fluctuation of brake effort (1.2.1 (e)) (10 times)
Rear Exhaust noisy (8.1.1 (a)) (10 times)
Front Tyre worn close to the legal limit (5.2.3 (e)) (10 times)
All direction indicators flashing more than 120 times a minute (4.4.4 (a)) (9 times)
Headlamp aim too low (4.1.2 (a)) (8 times)
Rear Rear reflector missing (4.8.2 (a) (ii)) (8 times)
Horn not working (7.7 (a)) (8 times)

Triumph Bonneville bobber pass rate by registration year

Year	Vehicles	Tests	Pass rate	Avg mileage
2023	85	92	93%	3,030
2022	305	493	89%	3,960
2021	209	476	92%	4,945
2019	1	5	80%	5,740
2018	2	13	77%	7,994
2017	21	133	95%	6,055
2016	12	75	88%	8,976

Triumph Bonneville bobber reliability FAQ

Across 1,400 Triumph Bonneville bobber vehicles in our MOT data, 91% pass the MOT (a 9% failure rate), with about 0.3 faults or advisories recorded per test.

The most frequently recorded Triumph Bonneville bobber MOT issues are: Exhaust noisy (8.1.1 (a)); Rear reflector missing (4.8.2 (a) (ii)); Headlamp aim too high (4.1.2 (a)).

The typical Triumph Bonneville bobber in our data has covered around 4,372 miles.

Compare the Triumph Bonneville bobber

See how the Triumph Bonneville bobber stacks up against other Triumph models on MOT reliability:

Bonneville bobber vs Toledo Bonneville bobber vs Unknown Bonneville bobber vs 2000 Bonneville bobber vs 1500

Check a specific Triumph Bonneville bobber

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