Audi A4 engine and engine cooling problems by year
228 NHTSA owner complaints name the engine and engine cooling across 20 A4 model years. The most reported year is 2001 with 31 reports.
| Year | Engine and Engine Cooling reports | Share | Median mileage | |
|---|---|---|---|---|
| 2018 A4 | 1 | 2% | — | |
| 2017 A4 | 2 | 4% | — | |
| 2015 A4 | 1 | 5% | — | |
| 2014 A4 | 1 | 3% | — | |
| 2013 A4 | 1 | 4% | — | |
| 2010 A4 | 9 | 14% | — | |
| 2009 A4 | 5 | 4% | — | |
| 2008 A4 | 4 | 2% | — | |
| 2007 A4 | 12 | 6% | 32,444 mi | |
| 2006 A4 | 6 | 2% | — | |
| 2005 A4 | 8 | 4% | — | |
| 2004 A4 | 18 | 10% | 60,250 mi | |
| 2003 A4 | 17 | 8% | 55,400 mi | |
| 2002 A4 | 28 | 15% | 29,100 mi | |
| 2001 A4 | 31 | 24% | 63,521 mi | |
| 2000 A4 | 11 | 11% | — | |
| 1999 A4 | 28 | 15% | 68,900 mi | |
| 1998 A4 | 28 | 11% | 75,000 mi | |
| 1997 A4 | 12 | 12% | — | |
| 1996 A4 | 5 | 6% | — |
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.