If you're still around I would love to know if you got to the passenger side clips. I did all 4 sensors yesterday and am now thinking I have to remove the coil pack to get to the final and impossible to reach passenger side clip for the upstream sensor

 

by removing the ignition wires, I was able to get back there. Good luck to the next guy reading this thread!!!

 

After trying I know I had to remove the coil pack to get access. It was a little pain in the a$s. Geezzz what a location.