O2 Sensor Location
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do yourself a favor and rent this tool from your local auto parts store. its specifically for the modular engine. I tried swapping them without it and what a hassle. Rented the tool and was done in a matter of minutes.....it's tight in there.
http://www.autozone.com/autozone/acc...er=948079_0_0_
http://www.autozone.com/autozone/acc...er=948079_0_0_