Trunk Shock, Genuine BMW - E86 Z4 Coupe (2006-2008)

This part is listed by BMW as BMW part number 51243420572 (51-24-3-420-572) and is described as Genuine BMW Trunk Shock for Rear Hatch on E86 Z4 3.0si, Z4 M Coupe (2006-2008).

This is a Genuine BMW gas-pressurized spring with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.