According to Mazda, ...
I have done this search many many times.
1) There is no standard bulb type (that's what Mazda says)
2) They are wedge type bulbs
3) Supposedly certain brands of a 7440 bulb will fit. The post that had that info (I don't know where it is) stated that he had purchased two pairs, one fit, one did not
4) In Texas at least, we are allowed to have White or Amber or any color in between for the fronts, and Amber or Red or any color in between for the rears.
If anyone knows of any white turn signal bulbs that are NOT blue that match the color of the headlighs, can you please let me know?
And if anyone find RED bulbs that will fit in the rear, please let me know as well?