Where is the crankshaft position sensor in a 2003 Mitsubishi Galant?

On the 2.4 and 3.6 liter engines it is behind the timing cover down by the crankshaft sprocket.

Caution: the timing belt cover bolts of varying lengths. Be sure to mark the bolts and the cover to return them to the proper holes.

You may wish to change timing belts while you are in there.