The only bulbs that "fit" are the ones from a mazda dealership and run around $20usd each. Standard H3 bulbs run around $2 and come in different watts and colors (although I wouldn't try a higher watt one) stock is 55w. Stock bulb has 2 prongs on the back. H3 has one wire with a prong.The bulb fits in the exact same way. Close the metal hold down tab. Now take a spare preice of short wire, put a small ring terminal on one side, and a spade on the other. (using the wire from a spare or bunt out H3 works great, just gota add the ring) Ground the ring using one of the scews in the case.
Put both the spades into the cover part.
Don't let them touch each other, you'll blow the fuse at the kick panel (done once :) ) so be creative on where the wires are facing when you stick the cap back on. Removing the screws that hold the fog light into the car SUCK!!! Have some new ones handy. If you manage to get them out they will be damaged. I picked some new ones up from the hardware store that have a socket head so next time will be better. and lots of anti seze. <back>