What are the size of the smaller light bulbs in our low beam headlight set? Trying to replace them and can't really find the size anywhere..please help! Thanks

You mean the Park lights? I think they're called 'T10' Wedge. The base is 9mm. They're the same as what's used in the ceiling interior fittings and puddle lights in the doors. There are 6 and 5 watt variants, from memory you use 5w for the park lights.

Jaguar refers to them as Pilot Lamps and they are in the dip beam lights on the X300 and the Main Beam lamps for the X308.

DBC11381 is the old Jag part #
XR811819 is the newer part number for the 5W wedge base bulb

bob gauff

Thanks so much for the replies. I'm planning on changing them for a whiter bulb to match my new light bulbs and also the tricky fog lights.