Toyota Prius: lighting & signalling MOT failures
Lighting & signalling was recorded as a failure area in 10.2% of Toyota Prius MOT tests — 88,103 tests out of 866,307. It shows up most on 2004 and 2005 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 |
|---|---|---|
| 2001 | 591 | 10.7% |
| 2002 | 325 | 13.5% |
| 2003 | 921 | 15.7% |
| 2004 | 5,735 | 17.8% |
| 2005 | 15,217 | 16.8% |
| 2006 | 22,567 | 16.8% |
| 2007 | 41,249 | 15.1% |
| 2008 | 41,049 | 14.6% |
| 2009 | 41,601 | 15.3% |
| 2010 | 56,569 | 16.4% |
| 2011 | 43,165 | 15.7% |
| 2012 | 49,497 | 12.3% |
| 2013 | 52,135 | 11.9% |
| 2014 | 65,051 | 11.4% |
| 2015 | 71,318 | 11.0% |
| 2016 | 79,932 | 5.7% |
| 2017 | 74,836 | 3.8% |
| 2018 | 71,403 | 4.3% |
| 2019 | 83,098 | 6.2% |
| 2020 | 35,794 | 5.9% |
| 2021 | 8,824 | 4.1% |
| 2022 | 3,179 | 2.1% |
| 2023 | 1,323 | 3.1% |
| 2024 | 645 | 2.0% |
Methodology & source. 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.