The 2004 Chrysler 300M's crankshaft position sensor (CKP sensor) is located on the
passenger side (right side) of the engine block, near the front of the engine. It's usually mounted close to the crankshaft pulley. You'll likely need to get under the car or at least have pretty good access to the front of the engine to see it.
However, it's crucial to consult a repair manual specific to your 2004 Chrysler 300M. The exact location might vary slightly depending on engine specifics (even within the same model year). A repair manual will have diagrams showing the sensor's precise location and aid in its identification.
