Anyone changed this one before. Its the one for cylinders 4,5,&6 on the manifold, before the cat. It s close to the firewall and very hard to get to. Anyone have any tricks to get at this one.

 

When I took mine off the IS, I just soaked the sensor thread with some Liquid Wrench for 2 days straight, Spray it down and then start your car so it can heat up, then turn off and spray it down again, wait till it cools off then spray it down again. Keep on doing until it's loose It took me a whole week!

 

Are you trying to change out your header?

 

Nope, im trying to change the sensor on the manifold, without removing the manifold .... if possible ..

 

I've tried, it's almost next to impossible to do....The only way I did the uninstall was to take it from under the car and take out the O2 Sensor from the ground...other than that...I don't know of any other way.