My sensor came off easily, when I changed mine a year ago. I sprayed it down with PB Blaster, waited 5 minutes and then used the actual sensor removal tool (borrowed it from my uncle). It came off with just two tugs on the wrench, then I slowly loosened it by taking it out almost one full turn and then re-tightening it about a quarter of a turn. The threads were perfect, and the new sensor went in flawlessly. Believe it or not, the hardest part was getting the connector undone. LOL, event that wasn't too hard just took longer than expected, as I didn't want to break the clip.

So true. Took me longer to get the connector apart.

I just got the oxygen sensor socket and a thread chaser bit(which apparently helps clean the threads). Hopefully I don't have to use that, then i can just return it.

I will probably attempt it on a warmer day in the garage, but I guess the problem I will have the most is not enough space to use a longer breaker bar when trying to take the sensor out. Definitely will spray some PB blaster on it and leave it for a while before attempting to take it out.

I'm all set, just the motivation to do it.

I have the car on ramp.
I can't get the connector undone!!!!

What's a good technique. I tried top and bottom. Either way, I can't get both hands in there to do both the pressing the tab and pulling the connector...

What's the point of taking the sensor out if I can't get the connector off too.

If you have help, have one person work on the clip and the second person pull to separate.

Keep at it, it will come apart.

Salim

Yah, I had my pop help me and we got the connector off, but now I realized the old sensor is in for good. PB blaster for 3-4 hrs, heated up and still wouldn't budge with the 7/8 AF sensor socket I got.

Can I just leave the AF sensor disconnected for the time being if I'm going to get my mechanic to help get the sensor out in the next 2 days? Is that the same as a faulty AF sensor to the computer without much harm done?

Get the box deep offset wrench.

http://www.harborfreight.com/8-piece...set-32042.html

The hole is perfect to pass the end through and if needed you can whack it with a hammer. Remember to work the threads back and forth and not just loosen. Loosen 1/2 a turn and work back 1/4 turn.

Salim

Thanks for the suggestion.
For the time being, my parents(it's their car) want to just let our trusty mechanic do it this time.
I noticed a rotten egg smell in the cabin now.

Believe it or not I got mine off with a crescent wrench! Why would I even attempt it, you say? Well, the car was hot and I sprayed it with PB Blaster. Then I got to talking to a buddy and came back to the car an hour later. Right when I was ready to pull it out I realized I had lent someone my open-ended wrenches. So, I figured I'd try the cresent. It was not tight at all! Popped the new one in with the crescent wrench as well!