For the 2005 Ford Mustang, the low-beam and high-beam headlights both use an H13 bulb. This dual-function fitment means the same H13 bulb serves both headlight functions.
Fog-light fitment is listed as either an H11 LED or an H16 LED, so check the existing fog-light socket and application before ordering. The front turn signals and parking lights use 3157 bulbs.
For rear lighting, the tail lights and brake lights use 4057R bulbs, while the rear turn signals use 4057. Reverse lights and the center stop light both use 921 bulbs. Front and rear side markers can use 2825 or 98 bulbs. The license-plate light is listed with either 168 or 917 bulbs, and the interior map lights also use 2825 or 98. The trunk light uses a 212-2 bulb.