How to Install LED Headlight Bulbs: A Step-by-Step Guide

Feeling overwhelmed by extra modification costs at your local shop just to upgrade your headlights? Not sure how to install LED headlight bulbs yourself? Don’t worry—Lasfit has you covered with this detailed guide that walks you through different installation methods based on your vehicle setup. Replacing halogen bulbs with LED headlight bulbs is easier than you think!

5 Quick Steps to Replace Your Headlight Bulbs

Step 1: Access the Headlight Housing

Before replacing the bulb, you'll need to access the headlight assembly. Here are three common methods, depending on your vehicle:

Method 1: Through the Engine Bay – Open the hood and reach into the headlight housing from the engine compartment.

Open the hood the install Lasfit led headlights

Method 2: Through the Wheel Fender – Turn the front wheels to one side and access the housing by removing or loosening the fender cover near the wheel well.

Take off the fender to the install Lasfit led headlights

Method 3: Remove the Front Bumper – In some cases, you may need to partially or fully remove the front bumper to reach the headlight housing.

Take off the front bumper to the install Lasfit led headlights

Step 2: Remove the Dust Cover

If your housing has a dust cover: Twist it counterclockwise and remove it.

Remove the dust cover to the install Lasfit led headlights

If there’s no dust cover: You can skip this step.

Step 3: Disconnect the Halogen Bulb

Unplug the power connector from the stock halogen bulb.

Disconnect the Halogen Bulb to the install Lasfit led headlights

Step 4: Remove the Halogen Bulb and Install the LED Bulb

The installation method may vary depending on your bulb type. Here’s how to handle the most common types:

H11 / 9005 / 9006 / H10 / H13 / 9012

Since H11, 9005, 9006, H10, H13, and 9012 bulbs can all be removed by twisting, their installation steps are as follows:

Twist to remove the halogen bulb.
Insert the LED bulb and twist it in the opposite direction to lock it in place.

9004 / 9007

Remove the halogen bulb and detach the locking ring.
Remove the collar from the LED bulb.
Install the locking ring onto the LED bulb, then reattach the collar.
Insert the LED bulb into the housing and twist to secure.

H4 / H1 / H3

Lasfit H4 H1 led bulbs installation method

Release the spring clip and remove the halogen bulb.
Detach the LED bulb’s metal base and fix it under the spring clip.
Insert the LED bulb into the fixed base.

For Lasfit Air Series H4:

The Lasfit LA Air Series is our all-in-one design lineup with no additional cables required. Both the H4 and H7 bulbs are designed to closely resemble halogen bulbs, giving you a hassle-free installation experience just like replacing a stock halogen light.

LA Air H4 LED headlight bulbs installation guide

Open the clip, remove the halogen bulb.
Directly insert the Air Series bulb and reclip.

H7

There are several types of headlight assemblies for H7 bulbs, and in this guide, we’re covering the most common one—with a spring clip.

Release the spring clip and remove the halogen bulb.
Detach the LED bulb’s metal base and secure it under the clip.
Insert the LED bulb into the fixed base.

For German/Korean Vehicles Using H7 Bulbs with Unique Adapter:

You may need to purchase an additional adapter.
Detach the halogen bulb and its metal base.
Combine the LED base with the special adapter, secure it, and insert the LED bulb.

For German/Korean Vehicles Using Lasfit Pro Series H7:

Upgrading your headlight bulbs on a German or Korean vehicle can be tricky, especially when most aftermarket H7 LED bulbs require an additional adapter. That’s why Lasfit offers custom-fit H7 LED bulbs designed specifically for select German and Korean models. With these vehicle-specific LED bulbs, you can enjoy a seamless plug-and-play installation—no extra adapter needed. Save time, skip the guesswork, and get a perfect fit every time with Lasfit.

Twist to remove the halogen bulb.
Insert the LED bulb and twist in the opposite direction to secure it.

For Lasfit Air Series H7:

LA Air H7 LED headlight bulbs installation guide

Remove the halogen bulb and directly install the Air Series LED bulb.
Reclip to secure.

Step 5: Connect Power and Test the Light Output

If the beam pattern looks good: Reinstall the dust cover (if applicable) and secure the engine bay, fender, or bumper as needed.
If the beam pattern is misaligned: Adjust the LED bulb’s position.
- Can’t adjust? Some LED bulbs may not support rotation.
- Using Lasfit LED Bulbs with Adjustable Socket? Some of Lasfit LED bulbs come with a 360° adjustable collar, allowing you to fine-tune the beam pattern.

Additional Installation Tips for LED Headlight Bulbs

Wear Gloves During Installation: To protect both your hands and the bulbs, it's recommended to wear gloves when replacing your headlight bulbs. This helps prevent oils or dirt from affecting performance.
Properly Adjust Dual Beam Headlights: If you're installing dual beam LED headlight bulbs, make sure the beam pattern is correctly aligned for both low and high beams. Not sure what dual beam means? Lasfit offers a clear explanation of the difference between single beam and dual beam LED bulbs, helping you choose and install the right type for your vehicle.

And that’s it! Now you know exactly how to install LED headlight bulbs and replace your old halogens with ease. Got any questions or specific installation tips for your vehicle? Drop a comment below—we’d love to help!