2010 Daihatsu Sirion — MOT failures & pass rate
693 MOT tests on the 2010 Daihatsu Sirion are in this dataset, and 79.7% of them passed. City cars of a similar age fail 24.3% of the time, so this is 3.9pp better than the group it competes with. Failures cluster in suspension, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — suspension (10.7%) and lighting & signalling (7.9%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are ball joint, rigid brake pipes and wipers — ball joint alone was recorded 44 times.
A 90-120k example is materially riskier than a 0-30k one: 30.8% versus 10.3%.
Suspension is the most common advisory, noted on 34.6% of tests — work that passed today but is likely due soon.
The trend is worsening — 18.5% of tests failed in 2021 against 27.9% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 10.7% | 74 |
| 2 | Lighting & signalling | 7.9% | 55 |
| 3 | Brakes | 6.1% | 42 |
| 4 | Tyres | 4.3% | 30 |
| 5 | Visibility | 4.2% | 29 |
| 6 | Body, structure & corrosion | 3.0% | 21 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Ball joint | 44 |
| 2 | Rigid brake pipes | 31 |
| 3 | Wipers | 30 |
| 4 | Linkage ball joints | 29 |
| 5 | Headlamp aim | 27 |
| 6 | Stop lamp | 18 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 34.6% | 240 |
| 2 | Brakes | 30.7% | 213 |
| 3 | Tyres | 22.9% | 159 |
| 4 | Other defects | 15.7% | 109 |
| 5 | Body, structure & corrosion | 8.5% | 59 |
| 6 | Lighting & signalling | 5.3% | 37 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 68 | 10.3% |
| 30-60k | 277 | 16.3% |
| 60-90k | 207 | 21.7% |
| 90-120k | 104 | 30.8% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 146 | 18.5% |
| 2022 | 138 | 17.4% |
| 2023 | 137 | 19.0% |
| 2024 | 132 | 18.9% |
| 2025 | 140 | 27.9% |
What to check before buying a 2010 Sirion
The failure pattern for this year is specific enough to inspect against: suspension accounted for 10.7% of tests. Start there.
- Suspension (10.7% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
- Lighting & signalling (7.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (6.1% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2010 Daihatsu Sirions pass their MOT?
79.7% of the 693 2010 Daihatsu Sirion MOT tests in this dataset passed — a 20.3% fail rate.
What is the most common MOT failure on a 2010 Daihatsu Sirion?
Suspension, recorded in 10.7% of tests, followed by lighting & signalling (7.9%).
Does the 2010 Sirion get worse with mileage?
Its MOT fail rate rises from 10.3% in the 0-30k band to 30.8% in the 90-120k band.
Methodology & source. Based on 693 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.