Oxygen Sensor
#1
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![Question](https://www.rx7club.com/images/icons/icon5.gif)
Can someone please tell me the location of the O2 sensor, and what needs to be removed to replace it.
Should replacing it be a priority for proper tuning?
Thank-you
Should replacing it be a priority for proper tuning?
Thank-you
#2
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It is located at the back of the engine compartment on the passenger side. Right by the exhuast manifold.
I think all you need to replace it is a 18 mm wrench.
About the priority, it is important for economy.
I think all you need to replace it is a 18 mm wrench.
About the priority, it is important for economy.
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You don't need to remove anything to replce it but, if it's the OEM unit, it's probably stuck like a no-cup-muffin.
I used about a three foot extension and a T-handle to brake mine loose from up top. It's easier to get some torque on it when you can be standing in the clear.
Get the generic BOSCH unit from a parts store instead of Mazda's $$$$ one. The BOSCH comes with a crimp-on connector and some heat shrink that you just attach to the factory wire after you clip the old unit off the end. Get some anti-sieze too coat the threads of the new sensor so the next guy doesn't have such a hard time with the R&R.
Cory
I used about a three foot extension and a T-handle to brake mine loose from up top. It's easier to get some torque on it when you can be standing in the clear.
Get the generic BOSCH unit from a parts store instead of Mazda's $$$$ one. The BOSCH comes with a crimp-on connector and some heat shrink that you just attach to the factory wire after you clip the old unit off the end. Get some anti-sieze too coat the threads of the new sensor so the next guy doesn't have such a hard time with the R&R.
Cory
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