1998 Nissan Altima Where is the bank 1 HO2S located in the drivers or passenger side? In front or behind?
Bank 1 is in the front of the engine, there is only 1 bank since its a 4 cyclinder what sensor are you looking for? if you want bank 1 sensor 1 it is the small circle below in the picture, if you want bank 1 sensor 2 it will be under the car
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