I searched the forum/net and couldn't find enough info to replace the pri O2 sensor..... I replaced the cat O2, unfortunately I replaced the good one. So I need to do the header one now.
My question is where is it? Under the heat shield? Looking from under the hood, I see the heat shield and on the passenger side 2 sensors but I can't see them completely. Also where is the connector for this sensor (where is the wire routed to) that will help me find the damn thing.

Can someone please help me out?
Thanks.

 

https://acurazine.com/forums/showthr...l+ratio+sensor
https://acurazine.com/forums/showthr...l+ratio+sensor
https://acurazine.com/forums/showthr...l+ratio+sensor

 

i just replaced mine. off the header before the cat. shop around if you havent bought one already. the acura dealer around me wanted 300 but i bought it from a dealer in arizona for 212 shipped

 

Accessable from under the hood or under the car? Do I have to take the heat shield from the header to see it? Where is it exactly?

Thanks

 

Lift the front end of the car up and place on jacks. You can access the air/fuel ratio sensor (primary O2 sensor) bung from underneath located on the collector header pipe (Find the blue wire and you'll find the sensor). You don't have to remove anything to access this area. Remove the sensor using a wrench. Due to rust build up in this area, you'll need "elbow grease". On the other end of the sensor is the electrical connector. You can access this and remove it from atop the engine back.

 

Thanks!

 

 

this article help me a lot, I am very aprreciated for it. thank you very much.
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