The 2018 Hyundai Sonata uses 9005 (HB3) bulbs for both low beam and high beam headlights. Here's a step-by-step guide to replace them:

Accessing the Headlight Assembly

  • Open the hood and locate the headlight assembly
  • Remove the black cover by turning it counterclockwise
  • On the passenger side, you may need to remove the coolant reservoir (two 10mm bolts) for easier access

Removing the Old Bulb

  • Disconnect the electrical connector from the bulb
  • Turn the bulb counterclockwise to unlock it
  • Carefully pull the old bulb straight out

Installing the New Bulb

  • Wear gloves to avoid touching the glass part of the new bulb
  • Insert the new 9005 bulb into the socket
  • Turn the bulb clockwise to lock it in place
  • Reconnect the electrical connector

Finishing Up

  • Replace the black cover by turning it clockwise
  • Test the new headlight to ensure it's working properly
  • If removed, reinstall the coolant reservoir

Tips for a Successful Replacement

  • Work in a well-lit area
  • Use needle-nose pliers if you have trouble gripping the cover
  • Consider replacing both headlights at the same time for consistent illumination

Remember, proper lighting is crucial for safe driving. If you're not comfortable performing this task, consult a professional mechanic.

FAQs About 2018 Hyundai Sonata Headlight Bulb Replacement

    • Can I upgrade to LED bulbs?
      While possible, it may require additional modifications and could affect your warranty. Stick to manufacturer-recommended bulbs for best results.
    • How often should I replace my headlight bulbs?
      Replace them when they dim or burn out, typically every 2-3 years for halogen bulbs.
    • Do I need any special tools?
      Basic hand tools should suffice, but long needle-nose pliers can be helpful for removing the cover.