For the 2011 Ford F-250, the supplied fitment data lists an H13 bulb for both low-beam and high-beam headlights. This combination bulb serves both headlight functions, so verify the existing bulb and connector before ordering. The listed fog light fitment is a 9145 LED.
Useful exterior replacements include 3157 bulbs for the front turn signals, parking lights, brake lights, tail lights, rear turn signals, and rear side markers. The front side marker uses a 2825, while the reverse light uses a 921 and the license plate light uses a 194.
Interior and under-hood applications include a 578 dome light, 906 map and engine lights, a 161 glove box bulb, a 194 courtesy light, and a 912 trunk light. These listings reflect the supplied fitment data; confirm the original bulb label when replacing a less common application.