For the 2018 Mitsubishi Outlander, the low beam is listed as LED, while the high beam uses a 9005 bulb. The low-beam listing does not provide a conventional halogen bulb code, so verify the original headlamp assembly before ordering a replacement.
Other notable exterior fitments include 7507 for the front turn signal, 7440A for the rear turn signal, and 921 for the reverse light. The brake light, center stop light, daytime running light, parking light, rear side marker, step light, and tail light are listed as LED.
For smaller lamps, the license plate and front side-marker applications may use either 2825 or 98; compare the existing bulb and socket. The dome, map, and trunk lights use DE3175. The glove-box light has two listed possibilities—2721 or 74—so compare it with the original bulb before purchasing.