o2 sensor location

[kelvinvo]

i have a bmw x5 2004 3.0 .how do i know that my o2 sensor locate before or after the calt.... ?

[Werewolf]

Originally Posted by kelvinvo

i have a bmw x5 2004 3.0 .how do i know that my o2 sensor locate before or after the calt.... ?

You have 02 sensors before and after the Cat. the ones before the cat are on the left-side of the engine block/valve cover. the ones behind are underneath the car

[wallyx5]

And if you are planing on replacing the O2 yourself, get the O2 tool. It makes changing them very easy and its cheap. Like $20.00 or so. I did mine this weekend and it took about an hour for all four.

[vnlecom]

Hey which tool did you use?

[wallyx5]

Originally Posted by vnlecom

Hey which tool did you use?

I got it from bavauto.com. Its called the "oxygen sensor tool" $ 18.95.

[vnlecom]

Thanks. I'll check it out.

[juppalgae]

which o2 sensors did you use?

[Werewolf]

OEM Bosch sensors for me

[nematombo]

What was your car doing when you changed your sensors? I have my checklight on and its talking about the sensor on the top of the engine that is easy to reach...i think thats what the dude said.