2013 Buick Regal bulb fitment varies by headlight setup. The high beam is listed as D1S, while the low beam may use either D1S or H11. Check the existing headlamp assembly and bulb base before ordering, especially when replacing low-beam bulbs.
- Fog lights: 9140 LED or 9145 LED.
- Front turn signals and parking lights: 4157NA with halogen headlights, or 3457A with HID headlights.
- Daytime running lights: H11 LED or H16 LED.
- Rear lighting: 3157 for reverse and rear turn signals; 3157R for brake and tail lights; 3157A for the rear side marker.
- Center stop light: LED.
- Front side marker: 194NA.
- License plate, dome, and map lights: 2825 or 98. Interior lighting also lists 6411, 6428, and 7065 for the vanity light.
For the front signal and parking-light positions, identify whether the Regal has halogen or HID headlights before selecting a replacement.