Ive got to get my car smogged before the end of this month and I was wondering if i should change the oxygen sensors. My car is a 95 mustang gt with 105,000 miles on it, I think the sensors have never been changed but im not sure? I took them out a few days ago to clean them and the car seems to idle a little better, but with the miles i have should I change them just to be safe? And if i change them, where can i buy some for a good price? I was gonna buy them from kragens but if anyone knows where i could get them cheaper that what be greatly appreciated. Thanks,

 

Probably not even worth it. If its working why replace it? My O2's are 10 years old at least and still going strong.