The 2018 Ford Focus uses different headlight bulb options depending on the installed headlamp assembly. The low beam is listed as D3S or H11, while the high beam is listed as D3S or H1. Check the existing bulb and headlight assembly before ordering, particularly if the vehicle has HID or halogen-style lighting.
Other fitment details vary by body style and equipment. On hatchbacks, the daytime running light is H1 with halogen headlights or LED with LED headlights. Hatchback parking light options include 168 or 917 with halogen headlights, and LED with HID headlights; 194 and 7441 are also listed. Front turn signal fitment should be compared with the original bulb: 7440A is one option, while hatchbacks may use 7507.
- Reverse light: 921
- Brake and tail lights: 3157R
- Rear turn signal: 3757A for hatchback or 3157 for sedan; compare to the original
- Center stop, license plate, dome, and map lights: LED
- Front side marker: 2827
Rear side-marker fitment is LED on hatchbacks with HID headlights and 194NA on sedans.