BIKERELIABILITY Reg check
Model report · 2005–2025
83.4%
first-time pass rate
10.9%
failed outright
3,162
median miles at test
579
MOT tests, 2005–2025
0.0pp
vs expected · age & mileage

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

first-time pass rate by test year · 2007–2017

The 150 SUPER's first-time pass rate has risen 10.1 points since 2007, 77.4% to 87.5%.

63%79%95%2007: 77.4% pass (31 tests)2008: 76.5% pass (34 tests)2009: 68.2% pass (44 tests)2010: 89.5% pass (38 tests)2011: 80.0% pass (50 tests)2012: 82.0% pass (61 tests)2013: 86.3% pass (51 tests)2014: 81.8% pass (55 tests)2015: 89.1% pass (55 tests)2016: 82.5% pass (40 tests)2017: 87.5% pass (40 tests)20072017

Pass rate by mileage

how the 150 SUPER's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage 150 SUPER passes first time 82.2% of the time; by 20k that's 88.9%.

81%86%90%0k: 82.2% pass (365 tests)10k: 83.8% pass (105 tests)20k: 88.9% pass (45 tests)0k10k20k

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 150 SUPER

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
74 46.2 1.7×
steering and suspension
32 20 1.1×
brakes
29 18.1 0.7×
tyres and wheels
7 4.4 0.5×
fuel and exhaust
6 3.8 1.4×
Items Not Tested
3 1.9 5.6×
reg plates and vin
3 1.9 0.9×
body and structure
2 1.2 0.7×
driving controls
2 1.2 1.5×
lamps and reflectors
2 1.2 0.1×

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 150 SUPER beats 4 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 150 SUPER.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the 150 Super

Pass rate by registration year

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

Best year to buy used: 1965 (92.9% pass). Weakest: 1975 (84.3%).

83%89%95%1965: 92.9% pass (56 tests)1966: 86.4% pass (140 tests)1975: 84.3% pass (51 tests)196519661975

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.

VESPA (DOUGLAS) 150 SUPER FAQ

answers computed from the data above · terms in the glossary

Is the VESPA (DOUGLAS) 150 SUPER reliable?

The VESPA (DOUGLAS) 150 SUPER is more reliable than average for its class: 83.4% of its 579 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #2868 of 5428 models.

What does a 150 SUPER fail its MOT on most?

lighting and signalling — 46% of all defects recorded against failed 150 SUPER tests.

What is the best year of 150 SUPER to buy used?

By first-time pass rate, 1965-registered examples do best (92.9%) and 1975 worst (84.3%). Condition and history still trump the year.

How many miles will a 150 SUPER last?

The median 150 SUPER shows 3,162 miles at test, and examples around 20k miles still pass 88.9% of the time — mileage alone rarely kills one.

Embed this bike

Free to embed on your site, blog or forum — a live Vespa (douglas) 150 Super reliability card that stays up to date and links back here. More on the free API page.