For the 2009 Nissan Altima, the high-beam headlight uses an H9 bulb. Low-beam fitment depends on the headlight type: models with halogen headlights use H11, while models with HID headlights use D2R. Confirm the headlight configuration before ordering.
Fog-light options are listed as H11 LED and H16 LED. The front turn signal and parking light use 3457A. At the rear, the brake and tail lights use 3157R, while the rear turn signal uses 3156 and the reverse light uses 921.
Other notable fitments include 3457A for the front side parking/marker application, 168NA for the rear side marker, and 168 or 917 for the license plate lights. The center stop light may use 921 or an LED option; compare it with the original bulb. Interior applications include 194 or 7441 for dome, map, courtesy, and interior lights, with 158 listed for the glove box and trunk.