BMW Z4 power train problems by year
15 NHTSA owner complaints name the power train across 6 Z4 model years. The most reported year is 2003 with 7 reports.
| Year | Power Train reports | Share | Median mileage | |
|---|---|---|---|---|
| 2011 Z4 | 2 | 4% | — | |
| 2009 Z4 | 1 | 5% | — | |
| 2007 Z4 | 1 | 3% | — | |
| 2006 Z4 | 1 | 1% | — | |
| 2004 Z4 | 3 | 1% | — | |
| 2003 Z4 | 7 | 2% | — |
Share is the fraction of that year’s complaints naming the power train. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.