2003 Kia Rio — MOT failures & pass rate
The 2003 Kia Rio passed 67.4% of its 1,639 recorded MOT tests. Against superminis of a similar age (29.3% fail rate), the 2003 Rio comes out 3.3pp worse. Failures cluster in suspension, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — suspension (16.9%) and lighting & signalling (15.6%) 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, headlamp aim and wheel bearings — component mounting prescribed areas alone was recorded 184 times.
Mileage is the strongest signal on the record: 14.5% of 0-30k cars fail, rising to 36.7% once past 150k — 2.5× the risk.
Suspension is the most common advisory, noted on 39.1% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 34.4% in 2021 to 30.0% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 16.9% | 277 |
| 2 | Lighting & signalling | 15.6% | 256 |
| 3 | Brakes | 13.1% | 215 |
| 4 | Body, structure & corrosion | 11.7% | 192 |
| 5 | Visibility | 8.2% | 135 |
| 6 | Tyres | 5.3% | 86 |
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 | 184 |
| 2 | Headlamp aim | 157 |
| 3 | Wheel bearings | 154 |
| 4 | Headlamp | 132 |
| 5 | Joints | 131 |
| 6 | Rigid brake pipes | 128 |
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 | 39.1% | 640 |
| 2 | Brakes | 38.0% | 622 |
| 3 | Tyres | 27.8% | 456 |
| 4 | Emissions & environmental | 25.5% | 418 |
| 5 | Lighting & signalling | 16.7% | 274 |
| 6 | Body, structure & corrosion | 16.5% | 271 |
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 | 69 | 14.5% |
| 30-60k | 634 | 31.6% |
| 60-90k | 581 | 35.1% |
| 90-120k | 259 | 33.2% |
| 120-150k | 66 | 36.4% |
| 150k+ | 30 | 36.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 564 | 34.4% |
| 2022 | 435 | 32.2% |
| 2023 | 300 | 32.0% |
| 2024 | 200 | 31.5% |
| 2025 | 140 | 30.0% |
What to check before buying a 2003 Rio
The failure pattern for this year is specific enough to inspect against: suspension accounted for 16.9% of tests. Start there.
- Suspension (16.9% 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 (15.6% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (13.1% 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 2003 Kia Rios pass their MOT?
67.4% of the 1,639 2003 Kia Rio MOT tests in this dataset passed — a 32.6% fail rate.
What is the most common MOT failure on a 2003 Kia Rio?
Suspension, recorded in 16.9% of tests, followed by lighting & signalling (15.6%).
Does the 2003 Rio get worse with mileage?
Its MOT fail rate rises from 14.5% in the 0-30k band to 36.7% in the 150k+ band.
Methodology & source. Based on 1,639 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.