The only problem with the LEDs in the turn signals is they may not draw enough current to get the flasher to work right. They have resistor kits for that if they don't. I have them in my work truck since I have to pull the camper to change them if they burn out and so far so good. I went with 18 LEDs as the 12s were not very bright. Make sure you get the same color LEDs as your lens covers because LEDs put out most of their illumination in whatever color they are.

1997 T-100 4X4 Xcab,Warn Hubs
02 Camry LE
2008 Yaris