2007 Volvo XC90 headlight fitment: The high-beam bulb is H9. Low-beam fitment depends on the headlight system: use H11 with halogen headlights or D1S with HID headlights. Confirm whether the vehicle has halogen or HID headlights before ordering low-beam replacements. The fog lights use H1 bulbs.
Other useful fitment details include 7506R bulbs for the brake lights, 7506 for the reverse lights, and 7507 for the rear turn signals. The center stop light uses an LED assembly. Front turn signals are listed with either 64136 or 2827 bulbs. Parking lights, front and rear side markers, and courtesy lights may use 2825 or 98 bulbs. The license plate, step, and trunk lights use 6418 bulbs, while the tail lights use 7225 and the dome light uses 212-2.