BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025
87.2%
first-time pass rate
5.9%
failed outright
12,562
median miles at test
3,189
MOT tests, 2005–2025

Pass rate over time

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

The FXDBI's first-time pass rate has risen 3.9 points since 2009, 86.6% to 90.5%.

78%86%95%2009: 86.6% pass (268 tests)2010: 83.3% pass (252 tests)2011: 88.9% pass (235 tests)2012: 86.3% pass (211 tests)2013: 88.2% pass (212 tests)2014: 87.4% pass (207 tests)2015: 88.0% pass (209 tests)2016: 90.3% pass (196 tests)2017: 90.4% pass (187 tests)2018: 89.9% pass (138 tests)2019: 91.8% pass (147 tests)2020: 82.2% pass (135 tests)2021: 86.4% pass (176 tests)2022: 80.7% pass (176 tests)2023: 85.3% pass (163 tests)2024: 88.2% pass (127 tests)2025: 90.5% pass (126 tests)20092025

Pass rate by mileage

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

A low-mileage FXDBI passes first time 88.6% of the time; by 50k that's 90.0%.

80%86%92%0k: 88.6% pass (1,190 tests)10k: 88.5% pass (1,182 tests)20k: 83.9% pass (436 tests)30k: 81.8% pass (214 tests)40k: 84.0% pass (81 tests)50k: 90.0% pass (30 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 FXDBI

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
65 20.4 0.4×
lamps and reflectors
52 16.4 0.8×
reg plates and vin
49 15.4 1.9×
brakes
41 12.9 0.3×
fuel and exhaust
29 9.1 1.1×
tyres and wheels
27 8.5 0.4×
steering and suspension
18 5.7 0.2×
Identification of the vehicle
17 5.3 2.3×
tyres
11 3.5 0.4×
steering
9 2.8 0.7×

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 FXDBI 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 FXDBI.

Pass rate by registration year

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

Best year to buy used: 2006 (87.8% pass). Weakest: 2005 (82.3%).

81%85%89%2005: 82.3% pass (373 tests)2006: 87.8% pass (2,616 tests)2007: 87.7% pass (65 tests)200520062007

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 FXDBI FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON FXDBI reliable?

The HARLEY-DAVIDSON FXDBI is more reliable than average for its class: 87.2% of its 3,189 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1854 of 5426 models.

What does a FXDBI fail its MOT on most?

lighting and signalling — 20% of all defects recorded against failed FXDBI tests.

What is the best year of FXDBI to buy used?

By first-time pass rate, 2006-registered examples do best (87.8%) and 2005 worst (82.3%). Condition and history still trump the year.

How many miles will a FXDBI last?

The median FXDBI shows 12,562 miles at test, and examples around 50k miles still pass 90.0% of the time — mileage alone rarely kills one.