Ldog22

I thought I remembered reading that the O2 sensors should be replaced in pairs. I can't remember if the pairs should be both the pre-cat or post-cat, or if the pairs should be both of the sensors on one Bank. In other words, should I change both the Bank 1 sensor 1 and Bank 2 sensor 1 at the same time, or should I change the Bank 1 sensor 1 and Bank 1 sensor 2 at the same time?

Thanks

Littleguy

Very glad you posted this as I am about to change sensor 1 and sensor 2, both on bank 1 in the next day or two and I had never heard of this.

bruceb58

Depends on how many miles you have. My first O2 sensor failed at 80K and it was just the heater circuit. Next one failed at 185K and I just went ahead and did all 4.

pinoiryder

iTrader: (5)

only replace the one went bad on mine.. i think i was in 140K miles.. bank 2

Littleguy

Thanks! I'll be replacing mine in the morning.

ZanderZ32

iTrader: (2)

Yeah no reason to do them all when one goes as other posters said. I would just because the next one will probably go soon but you don't need if unless you want.

Littleguy

Thanks, just changed mine and the light went off.