Replacing O2 sensors, and knock sensor?

[VG30DE]

Hey guys just wondering how you replace the O2 sensors on the J30, and if it is usually a touch project. Should I start spraying the sensors down with some PB Blaster a few days before, are they usually rusted in there a lot?

Same question about the knock sensor, I've heard of relocating it, and I wasn't sure what the best option was. Any advice would be great.

Thanks!

[gr8scott72]

Hey guys just wondering how you replace the O2 sensors on the J30, and if it is usually a touch project. Should I start spraying the sensors down with some PB Blaster a few days before, are they usually rusted in there a lot?

Same question about the knock sensor, I've heard of relocating it, and I wasn't sure what the best option was. Any advice would be great.

Thanks!

O2 sensor, yes, PB blaster it for DAYS before removing it esp. since you live in MA.

Knock sensor, you will want to either just bypass (ok as long as you ALWAYS use premium) or relocate as replacement requires removal of not only the upper intake plenum but also the lower intake plenum which iirc requires the removal of some of the timing belt stuff, covers etc.

[driverdriver]

There are two O2 sensors on this car.