02 sensors

[figdogg22]

I was wondering where I can buy o2 sensors for a 2000 3.9 qc, and how many do I need? it doesnt throw any codes but the dealer said I should replace them, its got 81k on the odometer, I was gonna ask the dealer to do 'em but they tend to run a little 2 expensive. thanks.

[chris4x4]

Any auto parts store should carry them. I think you have two sensors, but the best thing to do would be to get under your truck and follow the exhaust from the engine (both sides) and ending after the cat. Easy job to do. Just remove the O2 sensor from the exhaust and un-plug the electrical connector and in stall the new one. You may want to spray some penetrating lube ( P B Blaster) on the sensors where they conect to the exhaust and let it sit over night to make removal a bit easier. Let us know how it goes. :banana2:

[PhL0aTeR]

consider urself lucky if u have any less than what the 4.7 has..... ive replaced 2 so far.... 2 more need replacing....

[figdogg22]

Thank you! :drive:

[Ben]

Go to Auto Zone and get the Bosch O2's they are really good and not too badly priced.

[figdogg22]

how many for a 3.9? I heard 2, one upstream, one downstream, true? napa has them for around $85 :help:

[Slow97dakota]

fig what year 3.9? the upstream one moniters a/f and the down streem is just gay. l;ooks after the cat. put a 02 sim on the rear and junk the cat :biggthump

[figdogg22]

2000 dakota.

[Bad_banana]

On my o2 4.7 I only have 2 o2 sensors. Whenever my exhaust gets in from GSM i plan on installing headers/exhaust and dumping 2 o2 sims in there and not even worry about the o2's after that. :woowoo: