What year Triumph Bonneville Bobber is most reliable?

Based on MOT first-test pass rates, the 2021 Triumph Bonneville Bobber has the highest pass rate at 93.1%, out of 229 vehicles tested.

What are the most common Triumph Bonneville Bobber MOT failures?

The most common Triumph Bonneville Bobber MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Triumph Bonneville Bobber — Reliability by Year

1,184 vehicles · MOT data 2021–2025 · first-test pass rates

This page shows MOT first-test pass rates for each year the Triumph Bonneville Bobber was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

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Best pass rate year

2021

93.1% pass rate · 229 vehicles

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Lowest pass rate year

2022

92.4% pass rate · 337 vehicles

Year	Pass rate	Avg mileage	Vehicles
2025	First MOTs due 2028+	—	165
2024	First MOTs due 2027+	—	193
2023	First MOTs due 2026+	3,392 mi	260
2022	92.4%	2,708 mi	337
2021	93.1%	3,486 mi	229

* UK vehicles require their first MOT at 3 years old. Recent model years shown in grey have little or no MOT test data yet — pass rate data will build up as those vehicles mature.

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