Gather the Necessary Tools and Materials
 

• A replacement headlight bulb that is compatible with a 2018 Toyota RAV4.
• Clean gloves to prevent oils from your skin contacting the bulb.
• A Phillips screwdriver (if necessary).
• A clean cloth or towel for handling removable parts.

 
Ensure Safety and Prepare the Vehicle
 

• Turn off the engine of your Toyota RAV4 and remove the keys from the ignition.
• Ensure the headlights are off to avoid any electrical shock or heat-related injuries.
• Open the hood and secure it with the prop rod.
• If necessary, remove the negative battery terminal to ensure there’s no power going to the headlights.

 
Locate the Headlight Assembly
 

• Identify the rear side of the headlight assembly from within the engine compartment.
• Depending on which headlight is being replaced, you’ll find the assembly behind the radiator support in the engine bay.

 
Remove the Headlight Bulb
 

• Locate the bulb’s connector at the back of the headlight assembly and gently detach it, pressing on the tab and pulling it away.
• Turn the bulb counterclockwise until it releases, and then carefully pull the bulb out of the socket.
• If the bulb is secured with a retaining clip, press the clip to release the bulb.

 
Install the New Headlight Bulb
 

• Handle the new bulb with gloves. Hold the bulb by its base to prevent skin oils from sticking to it, which can cause premature failure.
• Insert the new bulb into the socket carefully and securely by turning it clockwise.
• Reattach the electrical connector to the bulb. Ensure it clicks into place to confirm a secure connection.

 
Test the Headlight
 

• Reconnect the negative battery terminal if it was removed.
• Turn on your vehicle’s ignition and test the new headlight to ensure it’s functioning properly.
• Test both low and high beam settings.

 
Seal Everything Back in Place
 

• Once confirmed that the new bulb is working, secure any components you might have moved or unscrewed to access the bulb.
• Close the hood securely.
• Dispose of the old headlight bulb properly.

By following these detailed steps, you can effectively replace the headlight bulb on your 2018 Toyota RAV4.