1991 Fox O2 Sensors

Blueinfan

Active Member
Mar 18, 2021
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Temecula
Hi Stang Group!

I was replacing both 02 sensors on my project car, 1991 Mustang 5.0 LX. The one on the driver side was easy to replace but the one on the right-side beneath the passenger is a pain in the butt! The third picture (highlighted in yellow/red circle) shows what's blocking me from removing the other O2 sensor. Is this normal? When I purchased this car the previous owners told me that it was not in an accident. But the more i start working on it, the more i see it leads me to believe that I was a sucker!

So is that normal for the [email protected] sensor and looks like the piece off the tranny is coming out.
 

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revhead347

Apparently my ex-husband made that mistake.
15 Year Member
Jun 14, 2004
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Acworth, GA
Looks like the plate is bent a little bit. Not something I would be concerned with. Do you have an actual O2 socket, or are you attempting this with a wrench?

Kurt
 

Mustang5L5

Put lubricant all over the balls
Mod Dude
Feb 18, 2001
38,304
14,215
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Massachusetts
If you are replacing the o2 sensor, just cut the wire lead off and use a deep, thin wall socket.

use the o2 socket for install
 
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91AOD5.0LX

I have a slight sag in my rear
Feb 20, 2021
372
200
53
Lake George NY
If you haven’t already, do a CARFAX on your VIN. If it were in an accident that was reported to law enforcement the CARFAX will show this. Also, the CARFAX may show the shop and specific repairs that were done. If the CARFAX is clean than you can assume she’s good or that nothing was put on paper. It may satisfy your curiosity and tell you more about your car (good and bad or neutral). Signup online for 20 bucks and get your answers in 5 minutes. I find it to be a great tool.