Gast struts get weakened over time, this is a normal service item. How do you recognise weak struts? When you press te door button or the key fob, and the doors will not open by them selves with any support then its time to replace them. Gast strut will max last for 4 to 5 years because they are always in a working position when te doors are closed. We did use replica struts, due to the poor quality we decided to only work with OEM door struts. So we can guarantee the quality. Left and right are the same type of struts, so you need two pieces.
Price on request, mail for more info.