참고만 하세요 – 복불복
consumer report 에 의하면 1999-2001 Z3: reliable above average
to 2005: Z4: reliable
2006-7: 2006 no longer recommended; avoid used cars from 2007
2007 Z4 as one of their “worst cars” for below-average reliability. The big problem areas for the 2007 are engine cooling, drive system, suspension, body integrity, power equipment and audio system.