Looked up the part number using Vida pn:36000522 Found all kinds of price ranges online. Question is about what is the rubber piece in the middle of the axle? Is it needed? Can I use the old one? My car has it, some of the ones I have found online it doesn't show it. Vida doesn't reference it either, that I can find.

http://www.swedishautoparts.com/cati...?mt=1349113011


Changing it out is no problem, just don't want to waste my time ordering wrong part. Thanks in advance.