For the 2003 Toyota Sienna, both the low-beam and high-beam headlights use a 9003 bulb. The supplied fitment data does not list a fog-light bulb for this model year.
- Front turn signals, parking lights, and front side markers use 3157A.
- Rear turn signals use 7440A.
- Brake and tail lights use 7443R.
- Reverse lights and the center stop light use 921.
- License-plate lighting may use 168 or 917.
- The dome light uses 6418, while the map light uses DE3175 and the trunk light uses DE3022.
- For the ash and courtesy lights, compare the replacement with the original bulb before ordering. Listed options include 2721 or 74 for the ash light, and 194, 7441, DE3021, or DE3175 for courtesy lighting, depending on the original configuration.