What year Triumph Bonneville T120 is most reliable?

Based on MOT first-test pass rates, the 2022 Triumph Bonneville T120 has the highest pass rate at 97.3%, out of 267 vehicles tested.

What are the most common Triumph Bonneville T120 MOT failures?

The most common Triumph Bonneville T120 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 T120 — Reliability by Year

991 vehicles · MOT data 2021–2025 · first-test pass rates

This page shows MOT first-test pass rates for each year the Triumph Bonneville T120 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

2022

97.3% pass rate · 267 vehicles

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Lowest pass rate year

2021

94.0% pass rate · 186 vehicles

Year	Pass rate	Avg mileage	Vehicles
2025	First MOTs due 2028+	—	131
2024	First MOTs due 2027+	—	200
2023	First MOTs due 2026+	3,604 mi	207
2022	97.3%	3,270 mi	267
2021	94.0%	4,043 mi	186

* 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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