I've owned my Z4 for 8 months now from new and 3 months have been spent in the garage. The car is fun to drive, the roadster experience is great when you want to drive it enthusiastically and on the flip side it's a great everyday car which can be driven in comfort. I have the 8 speed auto which is a great gearbox, changes are subtle in comfort mode and for the extra performance and lively acceleration sports mode lives up to the name. What lets the car down is a couple of critical elements - the chair adjustment is dreadful, I can never seem to get it back to normal after a visit to the garage or the missus has used it, I'm only 5,11 and the chair is pushed back to the limit touching the back of the car. The second, the main reason it has been in the garage, is the poor build and material quality, rattles and creaks come from all areas, the roof, dashboard, armrest and more... I've driven a few different cars, 5 to be precise and they all had some sort of issue, some much worse than my own vehicle. Look at E89 Z4 forums and you will realise the issues owners are experiencing, I am surprised What Car has awarded 5 stars for quality, I can only put that down to limited road testing. Owners are having to make homemade fixes to rectify rattles and creaks, the garage may resolve one issue but introduce another, which is a tell-tale sign of low quality materials and build. Anyone considering an E89 Z4 should consider how much cabin rattling and creaks they can put up with.
Dylan Wesleyharding, December 13th 2012