just wondering if I replaced them would I get better performance i have 140,000 miles now and haven't ever changed them.

 

???????????? get ready for what is coming your way............... theres a good lil saying that, if it aint broken dont fix it... any codes for em??? if not no you dont have to

 

You are long overdue -- they usually last 80-100k.
Beyond the above miles they just get lazy and don't thro a code. I sourced my o2 from

www.ngk.com.

Reasonable prices with end connectors, no need for slicing etc.

 

I have 135k+ on my car with no blown O2 sensors. I will be putting on a y-pipe this week so we'll see what happens. As mentioned above, unless your car is throwing codes or you're having other symptoms, there is no need to replace.

 

ahh u lucky guys, i have been going thru the Oxygen Sensor replacing phase,
i hate the SES light on my Max

 

thanks guys I'll just leave them alone for now. no codes, I was just wondering.

 

My 02 with 120K miles has thrown codes for both B1 and B2 Rear O2 sensors. Is there a cheaper solution or is it not worth getting a cheaper O2 sensor?

 

Are you the original owner? If so, you are very lucky and unusual to not have any o2 sensors go bad for 140K miles.

If your gas milage is good, I'd say leave them alone!

 

Im not the original owner but I bought the car with about 70,000 miles on it. I have never thrown a code yet.