First I'd like to point out that I was able to get the Upstream OEM Denso for $30.00 USD Shipped. I've been using DENSO for years and I can swear by them.
Here is the link for anyone intrested:
Now for the fun part.
Disconnect Battery Cable - This way the computer will reset itself to accomodate the new sensor.
Remove air intake snorkel:
Unplug to old sensor. Mine did not want to disconnect so I use a small flat blade screw driver.
Remove the heat sheild. 10mm bolts. Three on top one on bottom of sheild
Remove Sensor with sensor socket. I used a 7/8 wrench and had no problems:
Re-install everything in reverse order
I applied Dielectric grease as a personal preference:
I put grease in and out of plug:
New Sensor installed:
Sensor Plugged in:
I left my heat sheild off as it was rusted out till I find a repleacement. I re-installed the air intake snorkel back on:
Re-connected the battery and started the the car right up. Car feels like it's pulling harder but that may be just me.
I also cleaned the Mass Sensor, Throttle Body, EGR valve and changed the plugs.
Hope this helps anyone out there looking to do this.
This is very simple as long as the old sensor is not seized in.