Typically, the 2018 Hyundai Elantra uses H11 bulbs for the low-beam headlights, 9005 (HB3) bulbs for the high beams, and H11 for the fog lights. Some trims or regional variants with HID/LED headlights may differ, so check your owner's manual or the bulb label in the headlight housing to confirm.
How the headlight system is configured
The Elantra’s lighting setup can vary by trim and market. Most common configurations use halogen bulbs for main beams and fog lights, with LED daytime running lights or trim-specific features. Some higher trims or regional specs may equip HID or LED headlights, which use different replacement components or are not user-serviceable in the same way.
Before listing the standard sizes, here’s a quick reference of bulb sizes used for the key lighting functions on typical 2018 Elantra configurations.
- Low beam headlamps: H11
- High beam headlamps: 9005 (HB3)
- Fog lights: H11
Note: If your vehicle uses HID or LED headlights, the halogen bulb sizes above may not apply. Refer to your owner's manual or the bulb label for the exact configuration on your trim.
What to know about HID/LED headlamps
For models equipped with HID or LED headlights, bulb replacement is not the same as halogen systems. HID setups use ballast-controlled bulbs, and LED headlights are typically modular assemblies rather than replaceable halogen bulbs. If your 2018 Elantra has HID or LED headlights, consult Hyundai support or an authorized service provider to confirm the correct replacement parts and procedures.
Tips for safe bulb replacement
When replacing bulbs, power off the car and disconnect the battery if recommended by the manual. Wear gloves or use a clean cloth to handle bulbs, avoid touching the glass, and ensure the connector and cap are securely reattached. Replace bulbs in pairs when possible to maintain consistent brightness and color temperature.
Summary
In most 2018 Hyundai Elantra models, the standard halogen headlight setup uses H11 for the low beams, 9005 (HB3) for the high beams, and H11 for the fog lights. If your car has HID or LED headlights, bulb replacement is not the same as for halogen systems and you should consult the owner’s manual or a Hyundai service center for exact parts and procedures. Always verify the specific configuration for your trim and region to ensure you purchase the correct bulbs.