While the E85 Z4 offers a unique and overall stunning interior design, especially with the Z4M and Alpina refinements, it has been notoriously lacking in build quality. The doors of the pre-facelift models sound tinny and the interior is full of squeaks and creaks. By applying cloth and rubber tape on the interior panel connections we were able to cure most of the annoying noises, massively increasing the quality feel of the interior. Sound dampening materials were added to the doors to take care of the tinny sound.
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