For the 2008 Nissan Xterra, both the low-beam and high-beam headlights use a 9007 bulb. The same bulb serves both headlight functions, so confirm the existing bulb and connector before ordering.
Fog-light fitment is listed with two options: H11 LED and H16 LED. Check the fog-lamp housing and current bulb before selecting between these configurations.
Other useful replacement sizes include 3457A for the front turn signal and parking light, 3157R for the brake and tail lights, and 3156A for the rear turn signal. The front side marker uses 194NA, while the rear side marker uses 3157A. Reverse lights take 921 bulbs.
Interior applications use DE3175 bulbs for the dome, map, and trunk lights. The center stop light is listed as LED. License-plate lighting may use either 168 or 917, so verify the installed bulb size before purchase.