For the 2003 Toyota Corolla, the supplied fitment data lists a 9005 high-beam bulb. The same 9005 size is also listed for the daytime running lights. No low-beam bulb is provided in the data, so confirm the original bulb and headlight assembly before ordering a low-beam replacement.
Fog-light fitment may use either H3 or H3C; compare the existing bulb and socket carefully. Other notable exterior bulbs include 3157A for the front turn signal and both front and rear side markers, 3156 for the rear turn signal, and 3157R for the brake and tail lights. Reverse and center-stop lights use 921 bulbs.
- Parking lights have configuration-dependent options: 194 or 7441 for Option 1, or 3157A for Option 2.
- License-plate lighting may use 168 or 917.
- Interior fitment includes DE3175 for the dome light, with 194 or 7441 listed for map lights.
Because several locations have alternate fitments, compare the removed bulb with the original before purchasing.