2018 Toyota Yaris — MOT failures & pass rate
Across 151,625 MOT tests analysed for the 2018 Toyota Yaris, the most common recorded failure areas were visibility, lighting & signalling and tyres. Its pass rate of 92.2% was above the average for superminis of a similar age (88.9%). Higher-mileage examples failed more often — 18.6% in the 150k+ group versus 4.9% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Visibility | 4.4% | 6,678 |
| 2 | Lighting & signalling | 3.6% | 5,524 |
| 3 | Tyres | 3.1% | 4,775 |
| 4 | Suspension | 2.2% | 3,350 |
| 5 | Brakes | 1.3% | 1,890 |
| 6 | Body, structure & corrosion | 0.2% | 257 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 5,040 |
| 2 | Wheel bearings | 2,903 |
| 3 | Headlamp aim | 2,278 |
| 4 | Tread depth | 2,052 |
| 5 | Washers | 1,674 |
| 6 | Side repeaters | 1,510 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 21.5% | 32,571 |
| 2 | Brakes | 9.1% | 13,816 |
| 3 | Suspension | 5.5% | 8,309 |
| 4 | Other defects | 4.7% | 7,047 |
| 5 | Visibility | 2.4% | 3,620 |
| 6 | Lighting & signalling | 1.4% | 2,057 |
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 | 88,158 | 4.9% |
| 30-60k | 52,330 | 11.0% |
| 60-90k | 9,140 | 15.7% |
| 90-120k | 1,537 | 15.9% |
| 120-150k | 315 | 15.6% |
| 150k+ | 140 | 18.6% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Hybrid | 86,749 | 7.9% |
| Petrol | 64,867 | 7.7% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 30,116 | 4.8% |
| 2022 | 29,916 | 6.1% |
| 2023 | 30,304 | 7.6% |
| 2024 | 30,245 | 9.5% |
| 2025 | 31,044 | 10.9% |
What to check before buying a 2018 Yaris
Before buying a 2018 Toyota Yaris, focus on the areas it most often fails on. Visibility accounted for 4.4% of tests for this year.
- Visibility (4.4% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
- Lighting & signalling (3.6% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Tyres (3.1% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
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 2018 Toyota Yariss pass their MOT?
92.2% of the 151,625 2018 Toyota Yaris MOT tests in this dataset passed — a 7.8% fail rate.
What is the most common MOT failure on a 2018 Toyota Yaris?
Visibility, recorded in 4.4% of tests, followed by lighting & signalling (3.6%).
Does the 2018 Yaris get worse with mileage?
Its MOT fail rate rises from 4.9% in the 0-30k band to 18.6% in the 150k+ band.
Methodology & source. Based on 151,625 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.