Daihatsu Sirion MOT Failure Rate & Common Faults
We analysed 6,888 MOT tests on the Daihatsu Sirion carried out in 2023. 37% failed at the first attempt, which is well above the 29% average across all cars in the same data. Put another way, about 6 in 10 Sirions passed first time.
Results cover cars first registered from 1999 to 2010. Compared with other cars of the same age, 2010 models did best (71% passed, +10.9 points against the average for 13-year-old cars), while 2001 models fared worst (51%, −7.6 points). Tested cars had covered 70,289 miles on average, against 73,145 across all cars.
The most common reason for failure was suspension, found on 15.7% of tests (noticeably above the 8.9% seen across all cars). The single most frequent fault was "ball joint excessively worn", on 9.7% of tests.
- MOT tests analysed
- 6,888
- First-time pass rate
- 63%
- All cars: 71%
- Versus all cars
- −8.2 points
- Average mileage at test
- 70,289
- All cars: 73,145
Checking a particular Sirion?
See its own MOT history, advisories and mileage for free.
Sirion MOT pass rate by year
Older cars fail more often, so each year is compared with all cars of the same age. Bars above the dashed line did better than average for their age.
| First registered | Tests | Pass rate | All cars, same age | Difference | Avg mileage |
|---|---|---|---|---|---|
| 2010 | 112 | 71% | 60% | +10.9 points | 62,813 |
| 2009 | 959 | 69% | 59% | +10.1 points | 65,915 |
| 2008 | 1,994 | 64% | 57% | +7.0 points | 68,451 |
| 2007 | 1,527 | 63% | 57% | +5.9 points | 71,292 |
| 2006 | 825 | 60% | 56% | +4.2 points | 75,550 |
| 2005 | 817 | 60% | 56% | +3.9 points | 76,373 |
| 2004 | 125 | 59% | 56% | +3.2 points | 68,900 |
| 2003 | 156 | 62% | 57% | +4.9 points | 68,779 |
| 2002 | 137 | 58% | 58% | +0.9 points | 67,212 |
| 2001 | 94 | 51% | 59% | −7.6 points | 74,101 |
| 2000 | 61 | 59% | 61% | −1.6 points | 60,780 |
| 1999 | 59 | 58% | 62% | −4.9 points | 55,642 |
Why the Daihatsu Sirion fails its MOT
The share of tests with at least one failure in each area, compared with all cars.
| Failure area | Sirion | All cars |
|---|---|---|
| Suspension | 15.7% | 8.9% |
| Lights and electrics | 14.4% | 11.3% |
| Brakes | 9.7% | 6.8% |
| Visibility | 6.5% | 4.8% |
| Body and structure | 5.9% | 3.5% |
| Tyres | 5.3% | 6.3% |
| Noise, emissions and leaks | 4.5% | 3.1% |
| Steering | 2.8% | 1.8% |
| Seatbelts and airbags | 1.2% | 1.0% |
| Number plates and VIN | 0.4% | 0.4% |
Top 10 specific failure reasons
- 1ball joint excessively worn9.7%
- 2not working7.0%
- 3does not clear the windscreen effectively4.0%
- 4prescribed area excessively corroded significantly reducing structural strength3.3%
- 5excessively corroded2.9%
- 6projected beam image is obviously incorrect2.4%
- 7tread depth below requirements of 1.6mm2.2%
- 8not working on dipped beam2.1%
- 9has a major leak of exhaust gases1.8%
- 10less than 1.5 mm thick1.6%
Common Sirion MOT advisories
Advisories don't cause a fail, but they show what's wearing out. On a used Sirion, check whether these have been dealt with. Read our guide to MOT advisories.
| Advisory | Area | Share of tests |
|---|---|---|
| excessively corroded | Brakes | 15.8% |
| ball joint excessively worn | Suspension | 13.9% |
| tread depth below requirements of 1.6mm | Tyres | 12.8% |
| has a tear, caused by separation or partial failure of its structure | Tyres | 12.3% |
| corroded and seriously weakened | Suspension | 8.7% |
| in such a condition that it is seriously weakened | Brakes | 8.5% |
| pin or bush excessively worn | Suspension | 7.6% |
| less than 1.5 mm thick | Brakes | 5.5% |
| Play in steering rack inner joint(s) | Non-component advisories | 5.3% |
| has a product on the lens so that the light output is severely reduced | Lights and electrics | 4.7% |
Tips to help your Sirion pass
Based on where Sirions most often fail. For a full list, use our pre-MOT checklist.
Lights and electrics · 14.4% of Sirion tests
Walk round every light
With a helper, check headlights on dipped and main beam, sidelights, brake lights, indicators, the rear fog light and the number plate lamp. Replace blown bulbs in pairs and make sure no lenses are cracked.
Brakes · 9.7% of Sirion tests
Don't ignore brake warning signs
Grinding, squealing, a soft pedal or the car pulling to one side under braking are all worth investigating before the MOT. Check whether the last test noted worn pads or discs; if so, they may now be below the limit.
Visibility · 6.5% of Sirion tests
Clear the view
Replace wiper blades that smear, fill the washer bottle and get chips in the windscreen repaired early, especially in the area directly in front of the driver.
Compare with other models
Is the Sirion ULEZ compliant? See the Daihatsu Sirion ULEZ check, or view all Daihatsu models.
Models with similar pass rates
About this data
Based on 6,888 first MOT tests of the Daihatsu Sirion carried out in 2023.
Source: DVSA anonymised MOT test data (contains public sector information licensed under the Open Government Licence v3.0). First attempts on cars only; “pass rate” means passing first time. Averages cover all 32,735,164 cars tested (71% passed), and years with under 50 tests are hidden.
Learn more about how our data works.
Frequently asked questions
Answers from 6,888 first MOT tests of the Daihatsu Sirion.
What is the Daihatsu Sirion MOT failure rate?
In our data, 37% of 6,888 first MOT attempts on the Daihatsu Sirion ended in a fail, compared with 29% for all cars.
What is the most common reason a Daihatsu Sirion fails its MOT?
The most common failure areas were suspension (15.7% of tests), lights and electrics (14.4% of tests), brakes (9.7% of tests).
Which Sirion year has the best MOT pass rate?
Allowing for age, 2010 cars performed best: 71% passed first time, +10.9 points against the average for 13-year-old cars. The weakest was 2001, at 51% (−7.6 points).
How many miles had a typical Daihatsu Sirion covered at its MOT?
The average was 70,289 miles, against 73,145 for all cars tested. 2010 cars averaged 62,813 miles and 1999 cars 55,642.
What is the most common MOT advisory on the Daihatsu Sirion?
"excessively corroded" was recorded on 15.8% of tests, in the brakes area. 9.7% of Sirions failed in that area too.
How can I check a specific Sirion's MOT history?
Enter its registration in our free MOT check. Across the 6,888 Sirions in our data, first-time pass rates ranged from 51% to 71% by year, so one car's own record says more than the average.
Related guides
- MOT · 6 min readThe most common reasons cars fail their MOT (and how to avoid them)Lights alone failed 11.3% of cars at their 2023 MOT, more than any other area. The common failure areas, ranked, and the driveway checks that prevent them.Read the guide
- MOT · 6 min readPre-MOT checklist: 20 things to check yourself before the testTwenty quick checks, grouped by area, that you can do on your driveway in under half an hour. No tools beyond a coin and a helper needed for most.Read the guide
- MOT · 6 min readDangerous, major and minor MOT defects explainedSince 2018, every fault found at an MOT goes into one of four categories. Knowing the difference tells you whether you can drive home, and what to fix first.Read the guide
Check any Sirion's MOT history
Every test, failure, advisory and recorded mileage for a specific car. Free, from official DVSA data.