mk3supraman

ok, i'm sorry to bother about another o2 sensor question. i have noticed that my fuel economy has started to dip down on my '97 4runner v6 sr5. my engine light finally came on and i didn't write down the code but the description stated that my o2 sensors had a slow response. so i am guessing that i need to replace my sensors. i'm just curious where i should purchase them, advanced autos has one for 89.99, napa has one for 111.99. any thoughts?

snobdds

Only replace with denso...there are many threads on here about that topic just search a bit.

sparkplugs.com has good prices on denso o2 sensors.

DeathCougar

iTrader: (23)

Also, check your cats. Make sure the honeycomb isn't damaged or melted. If a cat is failing, it will give incorrect O2 readings. It would also indicate a problem in the engine, ie running too rich or too lean.

TheDurk

Go here to get the correct Denso part number and a decent price. For a better price, search for that part number on Amazon.com. Get the correct number first, Amazon's application info is sketchy at best. You can Google "Denso XXX-XXXX" using the number and check prices everywhere.