BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025
88.3%
first-time pass rate
4.8%
failed outright
9,975
median miles at test
8,694
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2009–2025

The FXDB's first-time pass rate has held steady since 2009 (87.3% → 87.8%).

85%88%91%2009: 87.3% pass (63 tests)2010: 88.1% pass (244 tests)2011: 87.2% pass (328 tests)2012: 88.7% pass (399 tests)2013: 85.9% pass (469 tests)2014: 88.2% pass (498 tests)2015: 89.2% pass (518 tests)2016: 88.1% pass (496 tests)2017: 89.4% pass (613 tests)2018: 88.9% pass (615 tests)2019: 87.3% pass (662 tests)2020: 90.3% pass (545 tests)2021: 87.9% pass (726 tests)2022: 88.6% pass (712 tests)2023: 87.2% pass (701 tests)2024: 89.1% pass (531 tests)2025: 87.8% pass (567 tests)20092025

Pass rate by mileage

how the FXDB's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FXDB passes first time 89.0% of the time; by 50k that's 76.1%.

73%84%94%0k: 89.0% pass (4,344 tests)10k: 87.2% pass (2,722 tests)20k: 88.3% pass (996 tests)30k: 90.9% pass (372 tests)40k: 87.9% pass (132 tests)50k: 76.1% pass (46 tests)0k30k50k

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a FXDB

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lamps and reflectors
222 31.1 1.1×
lighting and signalling
119 16.7 0.2×
brakes
79 11.1 0.2×
reg plates and vin
65 9.1 1.0×
fuel and exhaust
42 5.9 0.6×
suspension
40 5.6 0.5×
tyres and wheels
39 5.5 0.2×
tyres
38 5.3 0.6×
Identification of the vehicle
35 4.9 1.7×
structure and attachments
35 4.9 0.5×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the FXDB beats 0 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, HARLEY-DAVIDSON XL1200C).

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the FXDB.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2013 (91.3% pass). Weakest: 2012 (83.2%).

82%87%93%2006: 89.3% pass (735 tests)2007: 89.6% pass (1,881 tests)2008: 89.4% pass (1,193 tests)2009: 86.9% pass (1,037 tests)2010: 88.0% pass (608 tests)2011: 89.1% pass (469 tests)2012: 83.2% pass (190 tests)2013: 91.3% pass (138 tests)2014: 88.6% pass (761 tests)2015: 85.2% pass (973 tests)2016: 88.2% pass (570 tests)200620112016

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

HARLEY-DAVIDSON FXDB FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON FXDB reliable?

The HARLEY-DAVIDSON FXDB is more reliable than average for its class: 88.3% of its 8,694 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1506 of 5426 models.

What does a FXDB fail its MOT on most?

lamps and reflectors — 31% of all defects recorded against failed FXDB tests.

What is the best year of FXDB to buy used?

By first-time pass rate, 2013-registered examples do best (91.3%) and 2012 worst (83.2%). Condition and history still trump the year.

How many miles will a FXDB last?

The median FXDB shows 9,975 miles at test, and examples around 50k miles still pass 76.1% of the time — mileage alone rarely kills one.