"From what I gather, the sensor itself is in the air intake hose before the air cleaner box. (Correct?) "

It depends on the year and model.
Try to include them in your signature for clarity. It simplifies things for people when trying to help.

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1999 Porsche 996 Carrera Convertible
1994 420E - SOLD
1986 300E - SOLD, what a car
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