He should have thanked you for knowing what it is. As for those O-2 sensors I'd go with the cheaper ones. Almost two for one locally, plus shipping. But I paid almost as much shipping on a $15 switch as for the part just recently though. At least locally you have the parts right away. Decisions decisions!
Upstream or down. Reminds me of a joke I can't repeat here! I'm sure there is a difference. Use the upstream one before the Cad converter. I was at a show and a kid pointed at my car and said...look dad a funeral car! Ever notice, most of those funeral directors look like Lurch from the Adamm's Family? Look in the mirror foxy!:banana:
-------------------------------- I have called around locally and the prices are horrible. I also noticed in the pictures of the cheaper ones that there isn't a wire coming off of it. Why is this? I'm not trying to be annoying or difficult I am just trying to cover my @$$. I don't want to get them and find out that I have to connect the wires to it and risk screwing something up. I'm like Dewey in that I want anything I do on a car to be perfect.
Upstream and downstream have different resistance values because pre-cat exhaust is not as hot as post-cat exhaust. Unless your cat is frozen, at which point I wouldn't even call a vet. Back to reality, when you're removing the sensor, you can use a box or open ended wrench but the tool I have found most useful is a specific socket made for oxygen sensors. Get this, they call it an oxygen sensor socket. I know, I know, it sounds hokey and fake but seriously, they look like this: No worries about the wire, just slip the pigtail through the slot and spin to your heart's content. I've got one myself, only used it a couple times but it's paid for itself for sure. About to use it on the Shill-O-Ette to tell codes P0134 and P0135 to go to h***...if I ever get the transmission sorted out...
The simple 3/8 drive ones are $7 to $9... http://www.amazon.com/s/ref=nb_sb_s...=0&y=0&sprefix=oxygen+sensor+s,automotive,248 Advance carries a few, $14-$32, AutoZone will loan you one for a $25 deposit, OReilly doesn't seem to have them (their online catalog SUCKS for tool searches), but NAPA seems to be the place to go. They have the crow's foot style ones for about $8, the long socket style for $13, and some others. http://www.napaonline.com/Catalog/R...y=1&Dn=0&D=oxygen+sensor+socket&Dk=1&Dp=3&N=0
Many parts stores will loan tools with a purchase and deposit. Why buy something you may never need again? Or Harbour Freight for cheap tools for the home handyman. Women may not find you handsome, but they'll find you handy!~