MOT failure data · 2025
Daihatsu Sirion MOT problems
Across every Daihatsu Sirion that failed its 2025 MOT, the defect testers recorded most often was ball joint ball joint excessively worn, on 11.48% of failure items. The broadest problem area was suspension at 28.73%. These are recorded defects across the model, not a diagnosis of any one car.
Most common Daihatsu Sirion MOT failures
| # | Recorded defect | Area | Share |
|---|---|---|---|
| 1 | Ball joint ball joint excessively worn | Suspension | 11.48% |
| 2 | Headlamp aim projected beam image is obviously incorrect | Lamps, reflectors and electrical equipment | 4.69% |
| 3 | Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength | Suspension | 4.5% |
| 4 | Wipers does not clear the windscreen effectively | Visibility | 4.26% |
| 5 | Linkage ball joints ball joint excessively worn | Suspension | 3.72% |
| 6 | Rigid brake pipes excessively corroded | Brakes | 3.28% |
| 7 | Position lamp not working | Lamps, reflectors and electrical equipment | 2.68% |
| 8 | Stop lamp not working | Lamps, reflectors and electrical equipment | 2.61% |
| 9 | Tread depth tread depth below requirements of 1.6mm | Tyres | 2.36% |
| 10 | Steering rack gaiter missing or no longer prevents the ingress of dirt | Steering | 2.29% |
Shares are of all recorded failure items for this model, so they sum to less than 100% — a single failed test often records several defects, and the long tail below the top 10 is not shown.
What this means if you are buying one
Use it as a viewing checklist. If you are looking at a Daihatsu Sirion, these are the areas worth inspecting and worth asking about — and worth reading the car's own MOT history for, since a defect that keeps reappearing as an advisory is a better signal than any model-wide average.
The MOT record also has hard limits: it does not check the engine, clutch or gearbox, and it says nothing about outstanding finance, insurance write-off history, stolen markers or whether the mileage is genuine. Our used Daihatsu Sirion buying guide covers what to check beyond the MOT.
Checking a specific Daihatsu Sirion?
Enter its registration for finance, write-off, stolen, mileage and keeper history.
Other Daihatsu models
Daihatsu Sirion MOT FAQs
What does a Daihatsu Sirion most commonly fail its MOT on?
The single most recorded defect on Daihatsu Sirion cars failing their 2025 MOT was "ball joint ball joint excessively worn", appearing on 11.48% of failure items.
Does this mean my Daihatsu Sirion will fail?
No. This is what testers recorded across every Daihatsu Sirion that failed in 2025. It shows where this model tends to need attention, not the condition of any individual car. The Daihatsu Sirion passed 67.78% of its initial tests.
How do I see a specific Daihatsu Sirion's MOT history?
Enter its registration on our free MOT history check to see that car's own test results, advisories and recorded mileages.
See also: Daihatsu Sirion MOT pass rate · used Daihatsu Sirion buying guide · free MOT history check
Defect counts from the DVSA MOT Anonymised test-item data for 2025 (class 4 initial tests, failure items only — advisories and minor defects excluded), licensed under the Open Government Licence v3.0.