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How to Install 9004 LED Headlight Bulbs

by Lasfit Official August 10, 2023

How to Install 9004 LED Headlight Bulbs

The LASFIT 9004 LED headlight adopts the most advanced LED technology, which has excellent brightness and efficient energy consumption. It adopts a 360-degree adjustable socket for adjusting the beam pattern, making your driving safer and more reliable. At the same time, the 9004 LED headlight also has good heat dissipation performance, can run stably for a long time, and reduces the frequency of maintenance and replacement. Whether for city driving or long-distance travel, the magnified flux beam of the 9004 LED headlight, which is 400% brighter than halogen lamps, can provide you with excellent lighting effects and make you more confident and at ease when driving.
In this blog, I will guide you to install the 9004 LED headlight. The 9004 LED headlight is smaller/shorter in size than common LEDs on the market, no need to build an external driver, it plugs directly into the factory housing. Same design as OEM Halogen Bulbs, easy to install, and works great inside the housing without any issues.


Table of Contents

Preparation Before Installation
Lasfit 9004 LED Headlight Bulbs Step by Step Installation
How to Get The Right Bulb Size
Where Can I Buy Lasfit 9004 LED Headlight Bulbs?


2.Preparation Before Installation

Before installing 9004 LED headlight bulbs, you need to pay attention to the following preparations:
1. Suitability: Make sure the 9004 LED headlight bulb is perfectly suitable for your car model.
3. Power Off: Before starting to install any lights, make sure the vehicle is powered off and disconnect the vehicle battery.
4. Tools: Prepare the tools that may be needed during the installation process, such as wrenches, screwdrivers, wire connectors, etc.
5. Cleaning: Make sure the light area of the vehicle is clean and free from dust, oil or dirt.
6. Disassembly: Disassemble and assemble the old car light assembly step by step according to the vehicle instruction manual or the light installation guide.
7. Check: Before installing the new 9004 LED headlight, please check the wire connection, make sure all cables and connectors are in good contact.
Please note that if you are not familiar with the installation process or are not sure about your own operational capabilities, it is recommended to consult a professional technician for installation.


3. Lasfit 9004 LED Headlight Bulbs Step by Step Installation



Q1: The model of lamps I purchased is different from my OEM halogen lamps. Can I get an exchange for the correct model?
A1: The main reasons:
(1) Amazon Confirmed Fit system is not 100% accurate.
(2) Your headlight assembly is not an OEM part.
Please double check the model of your OEM halogen bulb. And contact our Customer Service.

Q2: The size of the lamnps is not correct, they're either too long or too wide, and LED lamps can't be installed into the headlight assembly. How can I get proper size lamps for my car?
A2: Some LED lamps are not in a 1:1 ratio with the OEM halogen bulbs. The large base is for better heat dissipation and prolonging the life of the lamps. If the lamps are not suitable for installation,please contact thne CustomerService.

Q3: Do you meet the five phenomenons below?
(1) Errors on instrument panel;
(2) The Lamp keeps flashing;
(3) Can't switch between high and low beams;
(4) High and low beam reversed;
(5) The Lamp does not turn on or off.
A3: The above phenomenons are decoding problems, which are mainly caused by the automotive computer failing to detect the correct signal. You can contact Customer Service to obtain the decoder and solve the decoding problem.
(decoder installation drawing or video)

Q4: How to adjust the lamps to 3-9 o'clock? l've read all the instructions, but still can't find the method.
A4: We recommend keeping the LED chips facinng the 3 o'clock and 9 o'clock positions to ensure the best beam pattern and visual effect. However, it is impossible to adjust to this position for some vehicles. There is no need to worry about the position of
the LED chips as long as the beam pattern is acceptable.

Q5: False Compatibility, this LED Bulb doesn't fit my vehicle?
A5: (1) Open the shopping link of the product, enter your model in the fitment at the top, and it will prompt whether it is suitabole.
(2) Contact us directly by email.


5.How to Get The Right Bulb Size

There is a Fitment query function on the Lasfit.com website, you only need to enter relevant information, the specific operation is as follows.
1. In the navigation bar, after entering the corresponding information in order, the search results will display the corresponding products.

2. By Vehicle: By querying a specific model, you can find all the product links of the model, and then find the product page that needs to be purchased.

For more operation details, please check our BLOG article: How To Find The Right Bulb Size.


6.Where Can I Buy Lasfit 9004 LED Headlight Bulbs?

Do you often feel unsafe when driving due to dim street lights or aging car lights? Then we strongly recommend you to choose our 9004 car headlights. This car light adopts high-quality LED light source, which has the characteristics of bright, high brightness and low power consumption, and can provide sufficient lighting in the dark to ensure your driving safety. In addition, the 9004 headlight adopts a compact design, which is light and easy to carry and easy to install. Buying 9004 headlights will make you feel more at ease and confident while driving. It is a must-have choice for your driving!

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