For the 2003 Toyota Avalon, the supplied fitment data lists a 9005 bulb for the high beam and also for the daytime running light (DRL). No low-beam bulb is listed in the available data, so verify the low-beam application on the vehicle before ordering.
Other key exterior bulbs include 1157A for the front turn signal, parking light, and front side marker, while the rear turn signal uses 7440A. The brake light uses 7443R, and the center stop light uses 921. Reverse lights also use 921.
License plate and tail-light fitment includes 168 and 917 applications, with the tail light also listing 7443R. The rear side marker uses 194NA. Interior applications include 6418 for the courtesy, dome, and map lights, 37 for the glove box, and 2825 or 98 for the trunk light. Check the original bulb and socket before replacement where multiple sizes are listed.