2021 Acura ILX bulb fitment lists LED for both the low-beam and high-beam headlights. No separate halogen bulb size is provided for these headlight functions, so confirm the vehicle’s original lighting equipment before ordering a replacement.
Fog-light fitment includes both H11 LED and H16 LED options. Check the installed fog-light housing or existing bulb to determine which specification applies. The front turn signal, brake light, center stop light, daytime running light, parking light, tail light, and rear side marker are also listed as LED.
- Reverse light: 921
- Rear turn signal: 7440A
- Front side marker: 168NA
- License plate and trunk light: 168 or 917
- Dome light: 194 or 7441
- Vanity light: 6615F
For interior and exterior replacements, match the listed bulb type and verify the original bulb or socket when multiple options are shown.