SUZUKI AN400
The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.
“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.
Pass rate over time
The AN400's first-time pass rate has fallen 4.6 points since 2005, 91.5% to 86.9%.
Pass rate by mileage
A low-mileage AN400 passes first time 91.7% of the time; by 50k that's 75.7%.
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 AN400
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| brakes |
|
1,593 | 36.3 | 1.1× |
| tyres and wheels |
|
728 | 16.6 | 1.2× |
| lighting and signalling |
|
588 | 13.4 | 0.4× |
| steering and suspension |
|
513 | 11.7 | 0.5× |
| lamps and reflectors |
|
305 | 6.9 | 0.5× |
| tyres |
|
224 | 5.1 | 1.1× |
| suspension |
|
189 | 4.3 | 0.8× |
| fuel and exhaust |
|
122 | 2.8 | 0.5× |
| structure and attachments |
|
88 | 2 | 0.4× |
| steering |
|
42 | 1 | 0.3× |
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
On first-time pass rate the AN400 beats 3 of its 4 closest rivals (KAWASAKI ER5, SUZUKI GS500, SUZUKI DR-Z400S).
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 AN400.
Compare with any bike
More SUZUKI models
Pass rate by registration year
Best year to buy used: 2011 (89.4% pass). Weakest: 2008 (82.5%).
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.
SUZUKI AN400 FAQ
Is the SUZUKI AN400 reliable?
The SUZUKI AN400 is about average for its class: 86.2% of its 27,056 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #2148 of 5428 models.
What does a AN400 fail its MOT on most?
brakes — 36% of all defects recorded against failed AN400 tests.
What is the best year of AN400 to buy used?
By first-time pass rate, 2011-registered examples do best (89.4%) and 2008 worst (82.5%). Condition and history still trump the year.
How many miles will a AN400 last?
The median AN400 shows 15,861 miles at test, and examples around 50k miles still pass 75.7% of the time — mileage alone rarely kills one.
Embed this bike
Free to embed on your site, blog or forum — a live Suzuki AN400 reliability card that stays up to date and links back here. More on the free API page.