O2 sensors
 

I know there's a difference in OEM and aftermarket o2's but what about between different year's? I just replaced my driver's side o2 with a DY-1039 or 5C5Z-9F472-AA. It doesnt look like the one I took off and I'm getting a lean bank 2 code from time to time. I'm still trying to get it tuned so it very well could be running lean but I just wanna make sure the o2 isnt throwing me off.
The car is a '97 GT
Thanks for any insight.

prob because it's the wrong O2 sensor, a 5C5Z-9F472-AA is for 1999 up Mustangs..... 1997 uses a F5MZ-9F472-AA O2 sensor....

So in other words, It wont work right. How much for one of those?

Im gonna' say prob not, esp since your javing problems wth it reading...now the correct O2 is $69.00 to you + s&h and Im out of but can have 1 tomorrow;)

Thanks, I'll get back to you on Monday. See what the fundz look like after this weekend.
It probably is the sensor, the old one wasnt throwing codes but the Fuel trim wasnt the same for bank 1 and 2 and the old sensor had 75k miles on it.

ok, sounds good