Originally Posted by Brandon77
That looks like it could be the correct number for the driver side of a 99 w/o PW/PL. Mine is a different year and power equipment but the box has the same 5-digit base part number shown on that page - 23713. That's a good indication that it is the same type of part.
To be sure, you could check with the parts department at your friendly local Ford dealer. Actually, when you figure in shipping, the price at the dealer should be close to the internet price anyway.