2000 Daihatsu Sirion — MOT failures & pass rate
The 2000 Daihatsu Sirion passed 69.3% of its 394 recorded MOT tests. That is 2.6 percentage points worse than city cars of a similar age, which fail at 28.1%. Failures cluster in suspension, body, structure & corrosion and brakes.
What the MOT record shows
No single area dominates — suspension (14.0%) and body, structure & corrosion (12.4%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are component mounting prescribed areas, catalyst emissions and service brake imbalance — component mounting prescribed areas alone was recorded 79 times.
A 60-90k example is materially riskier than a 0-30k one: 33.1% versus 22.2%.
Advisories point at the next bill rather than this one: suspension was flagged on 31.2% of tests without failing them.
The trend is worsening — 31.0% of tests failed in 2021 against 32.6% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 14.0% | 55 |
| 2 | Body, structure & corrosion | 12.4% | 49 |
| 3 | Brakes | 10.4% | 41 |
| 4 | Lighting & signalling | 10.2% | 40 |
| 5 | Emissions & environmental | 8.9% | 35 |
| 6 | Visibility | 5.3% | 21 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Component mounting prescribed areas | 79 |
| 2 | Catalyst emissions | 29 |
| 3 | Service brake imbalance | 25 |
| 4 | Joints | 25 |
| 5 | Integral vehicle structure condition | 23 |
| 6 | Wipers | 20 |
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 | 31.2% | 123 |
| 2 | Body, structure & corrosion | 29.9% | 118 |
| 3 | Tyres | 23.6% | 93 |
| 4 | Brakes | 22.3% | 88 |
| 5 | Other defects | 19.0% | 75 |
| 6 | Emissions & environmental | 11.7% | 46 |
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 | 54 | 22.2% |
| 30-60k | 141 | 29.1% |
| 60-90k | 163 | 33.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 113 | 31.0% |
| 2022 | 91 | 28.6% |
| 2023 | 78 | 29.5% |
| 2024 | 66 | 33.3% |
| 2025 | 46 | 32.6% |
What to check before buying a 2000 Sirion
On a 2000 Sirion, suspension is what the MOT record says goes wrong most — it appeared in 14.0% of tests. Check these areas before you commit.
- Suspension (14.0% 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.
- Body, structure & corrosion (12.4% of tests): The one to take seriously on older cars — corrosion to structural areas can be costly and is an MOT failure. Typical repair: £200–£1,500+.
- Brakes (10.4% 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 2000 Daihatsu Sirions pass their MOT?
69.3% of the 394 2000 Daihatsu Sirion MOT tests in this dataset passed — a 30.7% fail rate.
What is the most common MOT failure on a 2000 Daihatsu Sirion?
Suspension, recorded in 14.0% of tests, followed by body, structure & corrosion (12.4%).
Does the 2000 Sirion get worse with mileage?
Its MOT fail rate rises from 22.2% in the 0-30k band to 33.1% in the 60-90k band.
Methodology & source. Based on 394 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.