VESPA (DOUGLAS) P150X
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 P150X's first-time pass rate has fallen 4.2 points since 2006, 84.8% to 80.6%.
Pass rate by mileage
A low-mileage P150X passes first time 78.7% of the time; by 40k that's 72.2%.
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 P150X
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
51 | 39.8 |
| brakes |
|
18 | 14.1 |
| steering and suspension |
|
15 | 11.7 |
| lamps and reflectors |
|
13 | 10.2 |
| tyres and wheels |
|
12 | 9.4 |
| Items Not Tested |
|
5 | 3.9 |
| fuel and exhaust |
|
4 | 3.1 |
| structure and attachments |
|
4 | 3.1 |
| driving controls |
|
3 | 2.3 |
| reg plates and vin |
|
3 | 2.3 |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.
How rivals compare
On first-time pass rate the P150X beats 1 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).
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 P150X.
Compare with any bike
More VESPA (DOUGLAS) models
Pass rate by registration year
Best year to buy used: 1983 (88.9% pass). Weakest: 2002 (76.2%).
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.
Embed this bike
Free to embed on your site, blog or forum — a live Vespa (douglas) P150X reliability card that stays up to date and links back here. More on the free API page.