2021 Honda Ridgeline bulb fitment starts with an H11 low beam and 9005 high beam. The daytime running light also uses a 9005 bulb. The supplied fitment data does not list separate projector or non-projector headlight variations, so verify the original bulb before ordering if your Ridgeline has replacement or modified headlamp assemblies.
- Fog lights use H8 LED bulbs.
- Front turn signals and parking lights use 7444NA bulbs.
- Rear turn signals use 7440 bulbs.
- Brake lights, tail lights, and front and rear side markers are LED applications rather than listed replaceable bulb sizes.
- The license plate light uses a 194 bulb, while interior map, reading, and general interior lights use 194 bulbs.
- Auto, floor, and glove box lights use 74 bulbs. The trunk light is listed with either a 168 bulb or an LED application, so confirm the installed setup before purchasing.
- Vanity lights use 6615F bulbs.