BMW Z4 engine problems by year
28 NHTSA owner complaints name the engine across 7 Z4 model years. The most reported year is 2011 with 10 reports.
| Year | Engine reports | Share | Median mileage | |
|---|---|---|---|---|
| 2011 Z4 | 10 | 22% | — | |
| 2009 Z4 | 4 | 18% | — | |
| 2008 Z4 | 1 | 5% | — | |
| 2007 Z4 | 4 | 12% | — | |
| 2006 Z4 | 5 | 5% | — | |
| 2005 Z4 | 3 | 2% | — | |
| 2003 Z4 | 1 | 0% | — |
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.