FBAnder

I'm going to replace my driver's side post-cat O2 sensor next week and I was looking through the manual and it looks like I need to remove the coolant expansion tank to get at the connectors on the firewall. B2 S2 is brown and I'm gonna need a wrench and some jackstands...sound about right?

Thanks

My2ndS4

so you don't need to move the coolant expansion tank, which is on the driver's side. You do need to move it to replace the pre-cat driver's side O2, and probably the passenger side pre-cat O2, but I don't really see the need to move it for the rear O2 sensors, not that it is hard to do or anything. By the way, are you going to use a VW O2 sensor? You can save big money by doing so. You also need an O2 socket for your wrench (almost always for 3/8" socket wrench).

PSmalls::DoggieStyle

Yep! I read this and was like, "coolant tank is on the OTHER side...wtf"

FBAnder

and the diagrams didnt help