Step 1: Materials
1. A 05 Saturn VUE
2. O2 sensor AC Delco Part # 1255-8143 (I got mine from Ebay for $50 new)
3. O2 sensor socket. ($10 from Advanced Auto Parts)
4. 3/8 drive ratchet.
5. 10 min of your time.
(Note: In the picture I am showing the old O2 sensor that came out of the vehicle. I had already replaced it just prior to doing this instructable.)