Daihatsu
Sirion
10,924 MOT tests analysed. runs below the UK fleet average — here's where Sirions pass, fail, and end up on the retest sheet.
That's 9.8 points below the UK fleet average across our 1,984 tracked models — buyers should expect more first-time fails than the typical UK car.
Pass
67.7%
Pass-after-fix
5.2%
Fail
26.6%
Avg miles
74,376
Pass + Pass-after-fix + Fail = 100%
This model's production run straddles the January 2006 Euro 4 cutoff. Individual cars vary — check your registration plate on the government's ULEZ checker. Daily charges if driven in the zone: London £12.50 · Birmingham £8.00 .
The picture
Sirion: a below-average pass rate worth digging into
Across 8,612 MOT tests, the Sirion returns 69.9% first-time pass — well below the UK fleet average. The single most-logged Major fail is a defective headlamp lens. Worn suspension bushes and a split CV-joint boot round out the top three. Average tested mileage sits at 71,565, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
Top ten reasons for rejection.
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- 01
Headlamp reflector or lens slightly defective
686 occurrences · 6.3% of tests
- 02
A suspension pin, bush or joint excessively worn
670 occurrences · 6.1% of tests
- 03
A transmission shaft constant velocity joint boot severely deteriorated
477 occurrences · 4.4% of tests
- 04
The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired
376 occurrences · 3.4% of tests
- 05
Brake pipe damaged or excessively corroded
306 occurrences · 2.8% of tests
- 06
A suspension pin, bush or joint excessively worn
268 occurrences · 2.5% of tests
- 07
Wiper blade missing or obviously not clearing the windscreen
254 occurrences · 2.3% of tests
- 08
A suspension joint dust cover severely deteriorated
246 occurrences · 2.3% of tests
- 09
The aim of a headlamp is not within limits laid down in the requirements
230 occurrences · 2.1% of tests
- 10
Tyre tread depth not in accordance with the requirements
228 occurrences · 2.1% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 3 failures
£130–£410
If every one of this Sirion's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Tools that pre-empt a retest.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
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Recall history
1 UK recall on record.
The Sirion has 1 official UK vehicle recall covering defect details, remedies, and affected build dates.
Buying or keeping a Sirion?
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Sirion and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.