Are O2 Sensors something you want to buy factory?

[Casutherland42]

Last year I purchased all new aftermarket O2 Sensors for my 2000 Nissan Pathfinder. Low and behold my check engine light comes on AGAIN this summer and has stayed on consistantly. When I have my car hooked up the the computer, it said that my Bank 2 O2 Sensor was throwing a code. Could that possibly be something else, or are aftermarket O2 sensors just crap? Would you spent the extra $50-75+ per O2 sensor to replace them? I believe that they are around $130 factory.

I NEED A QUICK RESPONSE IF POSSIBLE! NEED THIS TODAY BEFORE I GO OUT OF TOWN!

[Towncivilian]

Bosch direct-fit sensors will be fine. Bosch is the original manufacturer for the factory sensors.

What is the specific code? If it's for a downstream (post-catalytic converter) sensor, it's not imperative that you fix it because all it does is monitor the efficiency level of the cat. If you have no emissions testing in your area, there's no need to replace the sensor at all if you don't want to - just scan for other codes periodically.

[Casutherland42]

For Bank 2 Sensor 1, is this the correct Bosch O2 Sensor?

http://www.rockauto.com/catalog/moreinf ... cc=1364138

[Towncivilian]

Yes. Be sure to enter 5% discount code 6892D28E6E22 in the "How Did You Hear About Us?" box at the shopping cart.

[Casutherland42]

Thanks man, went ahead and bought the Bosch upstream left sensor for my pathfinder from RockAuto! Ill let you know if my check engine light goes off once installed lol..