Toyota Yaris: lighting & signalling MOT failures
Lighting & signalling was a recorded failure area in 12.0% of Toyota Yaris MOT tests in this dataset. It is most prominent on 2003, 2004 cars.
Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair cost: £10–£150 (rough UK ballpark, not a quote).
Lighting & signalling failures by year
| Model year | Tests | Fail rate |
|---|---|---|
| 1999 | 9,301 | 16.0% |
| 2000 | 29,060 | 15.8% |
| 2001 | 54,923 | 17.5% |
| 2002 | 69,720 | 19.7% |
| 2003 | 88,513 | 22.2% |
| 2004 | 102,203 | 21.8% |
| 2005 | 119,960 | 21.8% |
| 2006 | 119,996 | 21.3% |
| 2007 | 141,620 | 20.2% |
| 2008 | 149,046 | 16.4% |
| 2011 | 97,432 | 11.3% |
| 2012 | 164,656 | 11.8% |
| 2017 | 148,004 | 4.5% |
| 2018 | 151,625 | 3.6% |
Methodology & source. 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.