LAMBRETTA SX150

150cc Petrol Class 1

#1047 of 5426 overall #15 of 49 LAMBRETTAs #40 of 412 scooter bikes

89.7%

first-time pass rate

4.8%

failed outright

2,542

median miles at test

3,960

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2021

The SX150's first-time pass rate has risen 7.7 points since 2005, 82.9% to 90.6%.

Pass rate by mileage

how the SX150's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage SX150 passes first time 90.3% of the time; by 50k that's 73.5%.

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 SX150

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	142	34.8	0.6×
brakes	102	25	0.4×
steering and suspension	83	20.3	0.6×
tyres and wheels	36	8.8	0.4×
body and structure	12	2.9	0.5×
driving controls	10	2.5	1.1×
reg plates and vin	9	2.2	0.3×
fuel and exhaust	6	1.5	0.2×
lamps and reflectors	5	1.2	0.1×
Items Not Tested	3	0.7	0.8×

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 SX150 beats 4 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).

PIAGGIO VESPA 80.7% pass · 287k tests HONDA PCX 125 81.1% pass · 88.6k tests HONDA Vision 110 78.2% pass · 50.6k tests YAMAHA NMAX 125 82.2% pass · 33.8k tests

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 SX150.

Pass rate by registration year

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

Best year to buy used: 1970 (95.1% pass). Weakest: 1966 (87.7%).

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.

LAMBRETTA SX150 FAQ

answers computed from the data above · terms in the glossary

Is the LAMBRETTA SX150 reliable?

The LAMBRETTA SX150 is more reliable than average for its class: 89.7% of its 3,960 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #1047 of 5426 models.

What does a SX150 fail its MOT on most?

lighting and signalling — 35% of all defects recorded against failed SX150 tests.

What is the best year of SX150 to buy used?

By first-time pass rate, 1970-registered examples do best (95.1%) and 1966 worst (87.7%). Condition and history still trump the year.

How many miles will a SX150 last?

The median SX150 shows 2,542 miles at test, and examples around 50k miles still pass 73.5% of the time — mileage alone rarely kills one.