For the 2011 Ford Fiesta, the low-beam headlight uses an H11B bulb, while the high beam uses a 9005. The supplied fitment data does not identify a projector or non-projector headlight variation, so verify the existing bulb before ordering if your vehicle has an unusual headlamp assembly.
Fog-light listings include both H11 LED and H16 LED options. Front turn signals and parking lights use 3157A bulbs, while the front side marker uses 168NA. Brake and tail lights are listed as 3157R.
Body style affects several rear and center lighting applications. The hatchback uses a 3157 reverse bulb and a 3157A rear turn signal; the sedan uses a 921 reverse bulb and a 3157 rear turn signal. The center stop light is listed as LED, with 2825 and 98 options specifically noted for the sedan. License-plate, map, and trunk lighting use 2825 or 98 bulbs, while the dome light uses 2886X.