1999 4runner limited emission problem

[kevinmcqn]

i believe i need new o2 sensors. can i use universal type sensors, or should i stick with the specific sensors for before and after the cat converter? if that is the case, what is the cheapest prices you've seen for o2 sensors? Thanks

[KimMG]

Check out the major chain parts stores for prices.

[Kiria]

Car part stores like AutoZone sells them for $128 per piece.I think on internet you can find them for $105 plus shiping.