DERBI SENDA SM

49cc Petrol Class 1

#5386 of 5426 overall #18 of 19 DERBIs #436 of 455 moped bikes

51.1%

first-time pass rate

35.5%

failed outright

10,212

median miles at test

1,013

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2008–2017

The SENDA SM's first-time pass rate has risen 9.3 points since 2008, 51.9% to 61.2%.

Pass rate by mileage

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

A low-mileage SENDA SM passes first time 53.6% of the time; by 20k that's 44.4%.

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 SENDA SM

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	661	41.6	5.9×
steering and suspension	238	15	4.6×
brakes	230	14.5	3.8×
drive system	146	9.2	12.0×
lamps and reflectors	115	7.2	2.8×
structure and attachments	44	2.8	3.9×
tyres and wheels	43	2.7	1.8×
suspension	43	2.7	3.9×
reg plates and vin	36	2.3	5.0×
fuel and exhaust	33	2.1	3.8×

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 SENDA SM beats 0 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests PIAGGIO ZIP 71.3% pass · 79.0k tests PIAGGIO NRG 65.5% pass · 40.5k tests PEUGEOT VIVACITY 70.4% pass · 29.7k 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 SENDA SM.

Pass rate by registration year

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

Best year to buy used: 2010 (59.6% pass). Weakest: 2005 (44.8%).

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.

DERBI SENDA SM FAQ

answers computed from the data above · terms in the glossary

Is the DERBI SENDA SM reliable?

The DERBI SENDA SM is less reliable than average for its class: 51.1% of its 1,013 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5386 of 5426 models.

What does a SENDA SM fail its MOT on most?

lighting and signalling — 42% of all defects recorded against failed SENDA SM tests.

What is the best year of SENDA SM to buy used?

By first-time pass rate, 2010-registered examples do best (59.6%) and 2005 worst (44.8%). Condition and history still trump the year.

How many miles will a SENDA SM last?

The median SENDA SM shows 10,212 miles at test, and examples around 20k miles still pass 44.4% of the time — mileage alone rarely kills one.