Should high mileage O2 sesor be changed out?

[Al J]

Do these have a natural life.My car runs fine, but mileage is lousy & I'm wondering if old O2 sensors are a problem.

 

[Labora]

If you are over 60k Miles on the stock ones. It probably won't hurt. Is it worth the $$ debatable? You can expect better gas mileage and better throttle response at the least.

 

[CManT1914]

If they aren't bad then they aren't worth dropping $100 on some new ones IMO. You'll know it when they go bad too.