Just wondering how often you guys are changing o2 sensors? I am pretty sure you'd get a code when it was bad? But anyone change it prior to?

And I was also wondering if you can clean MAF sensors?
I like things to run as smooth as possible, heh.

 

My sisters 02 sensor on her camry only lasted 30k(the car did sit for a LONG time), on average...I would say around 75k. Hell most OEM 02 sensors last well over 75k.

Actually...I gatta replace mine.