Daihatsu Sirion MOT pass rate: 67.8% (5,402 tests, 2025)

The Daihatsu Sirion passed 67.8% of its 5,402 MOT tests in 2025 — 9.7 points below the UK average of 77.5%. The median tested example was 18 years old with 70,892 miles on the clock.

67.8%Pass rate (2025)

5,402MOT tests analysed

70,892 miMedian mileage at test

18 yrsMedian age at test

How the Sirion compares

Daihatsu Sirion

67.8%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Daihatsu average (all models)

67.9%

What fails most on the Daihatsu Sirion

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the Sirion:

#	System	Defects recorded	Share
1	Suspension	1,535	29.3%
2	Lamps, reflectors and electrical equipment	1,012	19.3%
3	Brakes	794	15.1%
4	Body, chassis, structure	524	10.0%
5	Tyres	379	7.2%
6	Noise, emissions and leaks	350	6.7%

Pre-MOT checklist for Sirion owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
Walk round with all lights on: one blown bulb is the most avoidable fail there is
Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible
Look underneath for corrosion around sills and subframes, especially on older cars
Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory

Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

Sirion pass rate by registration year

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2005	2,112	64.8%	+0.3 pts	74,424
2006	2,133	66.7%	+2.3 pts	73,029
2007	4,009	69.0%	+3.9 pts	70,339
2008	5,383	70.0%	+4.9 pts	67,396
2009	2,638	72.3%	+5.9 pts	65,684

Check a specific Sirion before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Daihatsu models

Terios64.8% pass rate · 3,507 tests

FAQs

What is the MOT pass rate for a Daihatsu Sirion?

In 2025, 67.8% of 5,402 first MOT tests on the Daihatsu Sirion were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the Sirion fail its MOT on most?

The biggest defect group is suspension (29.3% of its recorded defects), followed by lamps, reflectors and electrical equipment.

Is the Daihatsu Sirion reliable?

MOT pass rate is one lens on durability: at 67.8% it performs below the national average at a median age of 18 years and 70,892 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.