Triumph Bonneville vs Harley-Davidson XLH 883

The Triumph Bonneville passes its MOT first time more often than the Harley-Davidson XLH 883 — 89.0% vs 87.4%, a 1.6-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Triumph Bonneville	Harley-Davidson XLH 883
First-time pass rate	89.0%	87.4%
Outright fail rate	5.0%	5.9%
Median miles at test	7,619	10,350
MOT tests analysed	195,256	41,267
Most common failure	brakes	lighting and signalling

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

TRIUMPH BONNEVILLE 89.0% pass · 195k tests HARLEY-DAVIDSON XLH 883 87.4% pass · 41.3k tests

See each bike's full report — trend, mileage curve, failure breakdown and rivals — on its own page.