BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/XL 883 N IRON 18
Model report · 2005–2025

HARLEY-DAVIDSON XL 883 N IRON 18

883cc Petrol Class 2
89.2%
first-time pass rate
4.4%
failed outright
4,527
median miles at test
1,597
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2021–2025

The XL 883 N IRON 18's first-time pass rate has risen 2.8 points since 2021, 87.8% to 90.6%.

87%89%92%2021: 87.8% pass (329 tests)2022: 89.1% pass (348 tests)2023: 89.8% pass (352 tests)2024: 88.6% pass (264 tests)2025: 90.6% pass (277 tests)20212025

What fails on a XL 883 N IRON 18

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lamps and reflectors
50 41 1.4×
structure and attachments
21 17.2 1.6×
Identification of the vehicle
20 16.4 5.4×
brakes
14 11.5 0.2×
tyres
8 6.6 0.7×
suspension
5 4.1 0.3×
steering
4 3.3 0.6×

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 XL 883 N IRON 18 beats 4 of its 4 closest rivals (TRIUMPH BONNEVILLE, TRIUMPH THUNDERBIRD, HARLEY-DAVIDSON XLH 883).

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 XL 883 N IRON 18.

Pass rate by registration year

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

Best year to buy used: 2017 (89.8% pass). Weakest: 2018 (89.2%).

88%90%91%2017: 89.8% pass (157 tests)2018: 89.2% pass (1,288 tests)2019: 89.2% pass (148 tests)201720182019

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 XL 883 N IRON 18 FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON XL 883 N IRON 18 reliable?

The HARLEY-DAVIDSON XL 883 N IRON 18 is more reliable than average for its class: 89.2% of its 1,597 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1212 of 5426 models.

What does a XL 883 N IRON 18 fail its MOT on most?

lamps and reflectors — 41% of all defects recorded against failed XL 883 N IRON 18 tests.

What is the best year of XL 883 N IRON 18 to buy used?

By first-time pass rate, 2017-registered examples do best (89.8%) and 2019 worst (89.2%). Condition and history still trump the year.