After 186,XXX miles this is what my OEM sensor looked like. Thankfully I did not have to run to VatoZone to rent a tool to get it out. The socket was from Vatozone though so if you need it, it is there. There was no clearance issues. I already had wiper assembly out because I am replacing my EGR and putting in new iridium spark plugs from Pulstar.com My standard O2 socket worked. Posted via the PriusChat mobile app.