Toyota Prius engine and engine cooling problems by year
298 NHTSA owner complaints name the engine and engine cooling across 17 Prius model years. The most reported year is 2004 with 89 reports.
| Year | Engine and Engine Cooling reports | Share | Median mileage | |
|---|---|---|---|---|
| 2022 Prius | 1 | 4% | — | |
| 2019 Prius | 1 | 3% | — | |
| 2018 Prius | 2 | 6% | — | |
| 2017 Prius | 1 | 1% | — | |
| 2016 Prius | 1 | 1% | — | |
| 2012 Prius | 1 | 0% | — | |
| 2011 Prius | 5 | 1% | — | |
| 2010 Prius | 33 | 1% | 13,511 mi | |
| 2009 Prius | 7 | 1% | — | |
| 2008 Prius | 16 | 1% | 19,169 mi | |
| 2007 Prius | 17 | 1% | 34,000 mi | |
| 2006 Prius | 20 | 1% | 53,250 mi | |
| 2005 Prius | 64 | 6% | 24,350 mi | |
| 2004 Prius | 89 | 15% | 13,965 mi | |
| 2003 Prius | 11 | 11% | — | |
| 2002 Prius | 11 | 7% | — | |
| 2001 Prius | 18 | 11% | 37,700 mi |
Share is the fraction of that year’s complaints naming the engine and engine cooling. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.