my 4runner has 121k miles on it and i decided to change the o2 sensor before the cat, well im glad i did. i took the old one out and it looked like a burnt peice of charcoal. hopefully it will make a difference.

 

Let us know of mpg difference and such...

 

Yes, I am interested in finding this out, too. Where did you get your O2 sensor?

 

got the sensor from urdusa.com, ill post when i can notice mpg difference, end of week maybe

 

I bought a brand new one of Ebay cause it was a deal. I havent changed it as the original(145k mi.) hasnt threw any codes.

Anyone think I should change it or wait?

 

it wouldnt hurt to just put it on, mine didnt throw any codes either

 

i dont know if its me or what. has anyone who has changed o2 sensor noticed a increase in power or performance. it could just be my head thinkin that there is more but who knows. still to early to tell gas mileage though

 

no, its your trd sticker

seriously, not really. i think its all in your head. it should not have that much of a drastic improvement to even notice

bob

 

thats what i figured, that TRD sticker did help me out when i got it though, gave me about 10-15hp to the wheels. i guess cool stickers do this sort of thing