Audi A4 engine problems by year
226 NHTSA owner complaints name the engine across 17 A4 model years. The most reported year is 2009 with 44 reports.
| Year | Engine reports | Share | Median mileage | |
|---|---|---|---|---|
| 2018 A4 | 5 | 11% | — | |
| 2017 A4 | 21 | 39% | — | |
| 2015 A4 | 10 | 53% | — | |
| 2014 A4 | 12 | 39% | — | |
| 2013 A4 | 6 | 25% | — | |
| 2012 A4 | 13 | 68% | — | |
| 2010 A4 | 37 | 58% | 100,500 mi | |
| 2009 A4 | 44 | 37% | 84,000 mi | |
| 2008 A4 | 13 | 7% | — | |
| 2007 A4 | 17 | 9% | 82,864 mi | |
| 2006 A4 | 15 | 5% | 90,438 mi | |
| 2005 A4 | 10 | 5% | — | |
| 2004 A4 | 7 | 4% | — | |
| 2003 A4 | 7 | 3% | — | |
| 2002 A4 | 5 | 3% | — | |
| 2001 A4 | 2 | 2% | — | |
| 1998 A4 | 2 | 1% | — |
Share is the fraction of that year’s complaints naming the engine. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.