For the 2003 Land Rover Discovery, both the low-beam and high-beam headlights use H7 bulbs. The supplied fitment data does not identify a projector or non-projector headlight distinction, so H7 is the listed size for both headlight functions.
- Fog lights: H11
- Front and rear turn signals: 7506
- Reverse lights and center stop light: 7506
- Brake and tail lights: 7528
- Parking lights and front side markers: 2825
- License plate, dome, and glove box lights: 6418
Additional interior fitments include 2825 for the courtesy light, 6461 for the map light, and 5008 for the trunk light. Check the bulb socket and existing lamp before ordering, particularly if the vehicle has replacement lighting assemblies.