I don't have the part number on hand. but it locates in the lower back cover of the transmission. Should be black in color, if you look at the cover from the lower side, there is a small stamp of a number 3 means 3 gear next to it (oil passage) Any transmission part store sells it, sometimes it can be clean up with cleaner. It will set a code if there is some debris from the tranny get in to the switch and clog it up, doesn't take much to clogged it up.
99 TL w/nav. 220k miles, chrome 03 type S wheels. F&R slotted rotors. SS catback. 04 TL 6sp.
87 Mit Starion g54b turbo.92 Talon turbo.92 Stealth 6g72 Twin turbo
"Boost is the replacement for displacement"