For most 2018 Honda Accords with halogen headlights, the low beam uses H11 and the high beam uses 9005. If your car is equipped with LED headlights, the bulbs aren’t user-replaceable and you would replace the entire headlight module or consult a dealer.
Halogen headlight setup (common on base trims)
If your Accord is equipped with halogen projector headlights, the following sizes apply for the low and high beams.
- Low beam: H11
- High beam: 9005 (HB3)
Always verify the exact sizes in your owner's manual or by inspecting the existing bulbs before purchasing replacements, since trims or regional options can differ.
LED headlight setup (higher trims and some options)
Some 2018 Accords come with LED headlights. In that configuration, there are no standard replaceable bulbs for the low/high beam functions—the LED modules are typically sealed and replaced as a unit.
- Bulbs not user-replaceable: LED assemblies are used instead of traditional replaceable bulbs.
- Replacement path: If an LED module fails or you need optics service, contact Honda or a dealership for a module replacement or headlight service.
Note that on some LED-equipped models, the high beam may be performed by a separate LED module within the headlight, but you don’t replace bulbs like H11/9005; the replacement involves the entire headlight unit or module.
Tips for buying bulbs
When purchasing bulbs, ensure compatibility with your exact trim and whether you have halogen or LED headlights. If in doubt, check the car’s manual or call a Honda dealer’s service department.
In summary, halogen low beam is typically H11 and high beam 9005 for the 2018 Accord; LED headlights use integrated modules rather than replaceable bulbs.
Summary
The 2018 Honda Accord’s bulb sizes vary by headlight type: halogen low beam H11 and high beam 9005 for most trims, while LED headlights rely on non-replaceable modules. Confirm your exact trim and VIN with the owner’s manual or a Honda dealer to ensure you purchase the correct parts.