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MOT reliability

Triumph Bonniville

83 vehicles · 525 completed MOT tests analysed
89%
MOT pass rate

Based on 83 Triumph Bonniville vehicles and 525 completed MOT tests, the Triumph Bonniville has an overall 89% pass rate, with an average recorded mileage of 22,154 miles.

83
Vehicles
525
MOT tests
351
Avg miles / year
0.3
Faults per test
1%
Dangerous-fault share

Triumph Bonniville problem areas

Where faults occur most across all Triumph Bonniville MOT tests:

  • Other90%
  • Brakes11%
  • Steering9%
  • Lamps & electrical9%
  • Tyres, wheels & suspension9%
  • Body & structure4%
  • Seatbelts & equipment4%
  • Emissions & nuisance2%

Triumph Bonniville pass rate by age

Age (years)TestsPass rate
12100%
21100%
31191%
49100%
51090%
6786%
76100%
8683%
96100%
106100%
11580%
12888%
134100%
14580%
15683%
16475%
175100%
185100%
196100%
20989%

Fuel types: Petrol (83)

Most common Triumph Bonniville MOT faults

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

  1. Rear Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (12 times)
  2. Rear Tyre worn close to the legal limit (4.1.3(ii)) (9 times)
  3. Exhaust noisy (7.1.2) (6 times)
  4. Stop lamp does not illuminate immediately a brake applies (1.3.1a) (5 times)
  5. Front Tyre worn close to the legal limit (4.1.3(ii)) (5 times)
  6. Headlamp aim too high (1.6) (5 times)
  7. Front wheel bearings have slight free play (2.3.5b) (4 times)
  8. Exhaust noisy (8.1.1 (a)) (4 times)
  9. Handlebar mounting slightly deteriorated (2.1.1d) (4 times)
  10. Chain guard missing (4 times)
  11. Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) (3 times)
  12. Front Wheel has a slightly distorted bead rim (5.2.2 (c) (i)) (3 times)
  13. Front Front shock absorber has light misting of stanchion (2.3.3) (3 times)
  14. Headlamp aim too low (1.6) (3 times)
  15. Rear brake slightly slow to fully release (2 times)

Triumph Bonniville pass rate by registration year

YearVehiclesTestsPass rateAvg mileage
2012 2 13 100% 2,005
2011 2 12 100% 5,459
2010 2 15 87% 9,418
2009 1 3 100% 4,267
2006 1 19 84% 12,626
2005 1 9 100% 12,629
2003 1 11 100% 5,482
2002 2 25 80% 24,823
1997 1 4 100% 1,857
1994 2 8 100% 7,081
1993 1 1 100% 120,093
1992 1 1 100% 14,232
1991 2 9 89% 55,849
1989 1 12 100% 28,155
1986 1 6 100% 36,185
1983 1 12 92% 8,570
1981 3 31 90% 27,909
1980 3 19 89% 24,248
1979 3 30 80% 33,223
1978 10 66 88% 22,125
1977 6 36 81% 21,587
1976 6 34 82% 28,597
1975 2 7 71% 18,642
1973 5 12 100% 13,119
1972 2 15 93% 23,040
1971 3 9 100% 6,895
1970 7 48 85% 16,561
1969 1 2 50% 26,050
1968 3 13 92% 19,687
1967 2 23 96% 36,859
1966 2 13 92% 21,511
1961 3 7 100% 38,261

Triumph Bonniville reliability FAQ

Across 83 Triumph Bonniville vehicles in our MOT data, 89% pass the MOT (a 11% failure rate), with about 0.3 faults or advisories recorded per test.

The most frequently recorded Triumph Bonniville MOT issues are: Rear Roller brake test indicates slight fluctuation of brake effort (3.3.A1d); Rear Tyre worn close to the legal limit (4.1.3(ii)); Exhaust noisy (7.1.2).

The typical Triumph Bonniville in our data has covered around 22,154 miles.

Compare the Triumph Bonniville

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

Bonniville vs Toledo Bonniville vs Unknown Bonniville vs 2000 Bonniville vs 1500

Check a specific Triumph Bonniville

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See all Triumph models · Learn about common MOT failures · what an MOT checks