Join Date: Jan 2007
Location: Southern Ca
Car: 00 OB 07 OBXT
Feedback Score: 0 reviews
If it's badly rusted, use a relatively fine wire brush to clean up the spot where the sensor meets the bung [yeah I know, but that's what it's called ;]. Soak with PB
What Are you using, a O2 sensor socket ? or a closed wrench ?
I've had good luck with rusted ones by giving the wrench a good smack with a deadblow hammer ... breaks the initial rust bond and, that's what's giving you trouble. The issue most of the time is getting a good swing at the wrench.