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how to replace the front oxygen sensor?

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Old 03-24-2015 | 05:14 PM
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keen0arene's Avatar
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CA how to replace the front oxygen sensor?

I need to know how to replace the front o2 sensor, not the rear one. The sensor seems to be in a very inaccessible location. Is it possible to replace it without removing the entire exhaust system?

What's the easiest way to replace it?
Old 03-24-2015 | 07:04 PM
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Yes it is possible and pretty easy to replace so long as you have an O2 socket and it is not seized. SEARCH.
Old 03-24-2015 | 07:29 PM
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Originally Posted by 9krpmrx8
Yes it is possible and pretty easy to replace so long as you have an O2 socket and it is not seized. SEARCH.
Thanks for replying

ok,

https://www.rx8club.com/series-i-tec...nstall-209661/

Last edited by keen0arene; 03-24-2015 at 07:38 PM.
Old 03-25-2015 | 02:59 PM
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keen0arene's Avatar
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Originally Posted by 9krpmrx8
Yes it is possible and pretty easy to replace so long as you have an O2 socket and it is not seized. SEARCH.
its not that easy, sadly. The sensor requires a low profile ratchet and socket.

Also I cant get to the electrical connector, it seems like its dorsal-ly covered by another piece of the car.

can anyone help?
Old 03-25-2015 | 03:03 PM
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I have done it many times on RX-8's But yeah if you don't have the right tools it might be a PIA.
Old 03-25-2015 | 07:24 PM
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The front O2 sensor connector is located at the top of the trans bellhousing where it meets the engine

unbolting the AC line bracket from the driver side firewall will let you get your hand in easier, kind of a PITA to reach it, but do-able
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