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Look on the right (passenger) side of the engine, above the valve cover. You will see two objects with vacumn hoses & an electrical plugin on each. The outside one has a round thingy on top with a tiny filter in it. The inside one has a flat top on it, & no filter. This is the one you want to change! Just unplug the electric connector, & the vacumn hose, the R&R the unit. My practise has always been to change the MAP SENSOR & OXYGEN SENSOR both at the same time, since the failure of one can usually corrupt the other one! If one is not working properly, the other one can't work properly either, & the catalytic converter will end up plugged! Good luck.
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