OK! The bulb IN the twist-in socket is part #PC-194. They are not necessarily a dealer item. I bought one from Carquest (all they had in stock) for $1.25, then five more from a napa dealer for $3.10 each, just call around with the part number above. Trust me, you don't want to just buy the #195 bulb and try to get it into the socket, it don't work real well.......