just buy the 899 and if it fits then it fits, there only like $6 if it dont fit take them back. or just remove your headlight and pull out your foglight bulb and take it with you to the store.
I think I got the 899's when I had to replace mine...easiest thing to do, is pull the drivers side bulb, look at it...it should have the bulb number on the base. (I say the drivers side, 'cause the passanger side is a PITA to get to due to the washer fluid tank being in the way.)
Well after doing some research the only difference it the watts of the bulbs and that's it they have the same bace to them