For the 2007 Subaru Impreza, the high-beam headlight uses a 9005 bulb. Low-beam fitment depends on the vehicle configuration: the 2.5i uses H7, while the WRX STI Limited uses D2S. Confirm the trim and original headlamp assembly before ordering, since these low-beam applications are not interchangeable.
Front fog lights are listed with either H3 or H3C fitment, so compare the installed bulb and socket. Exterior lighting is otherwise straightforward: front and rear turn signals use 7440A, reverse lights use 7440, and brake and tail lights use 7443R. The center stop light may be factory LED, or may use 7440 or 912 on the WRX Limited; compare the original bulb for the listed options.
Parking and license-plate lights may use 168 or 917. Interior fitment includes DE3175 for dome and map lights, 2721 for the glove box, and 2825 or 98 for the trunk.