1. Introduction
Thank you for choosing AUXITO T25 3157 LED Car Light Bulbs. These high-performance LED bulbs are designed to provide superior illumination and enhance the safety and aesthetics of your vehicle. This manual provides essential information for the proper installation, operation, and maintenance of your new LED lights.

Image 1: AUXITO T25 3157 LED bulbs and their packaging.
2. Product Overview and Features
The AUXITO T25 3157 LED bulbs are engineered for brilliant illumination and durability, featuring advanced LED technology and efficient heat dissipation.
Key Features:
- Brilliant Illumination: Ultra-bright 1200LM (White) with 6500K white light, offering 360° shining for no dark spots.
- High Power LED Chips: Equipped with 5pcs 3030SMD + 18pcs 4014SMD for enhanced luminous efficiency and a perfect beam pattern.
- Fast Heat Dissipation: Constructed with aviation aluminum material and a hollow inner body design, along with a built-in intelligent IC that automatically adjusts temperature, ensuring a longer lifespan.
- Integrated Electronics: Features a built-in load resistor and IC driver for Canbus error-free operation in most vehicles, offering wide voltage and constant current.
- Plug & Play Installation: Non-polarity design allows for easy, direct replacement of original halogen bulbs.
- Versatile Application: Suitable for various automotive lighting functions.

Image 2: Diagram highlighting brilliant illumination features including 1200LM, 6500K white, 360° shining, and 5pcs 3030SMD + 18pcs 4014SMD LED chipsets.

Image 3: Illustration of the fast heat dissipation design, featuring aviation aluminum material, hollow inner body, and a built-in intelligent IC.

Image 4: Product details emphasizing quality assurance, aluminum body for better heat dissipation, high power 3030SMD+4014SMD, and a built-in load resistor & IC driver.
3. Specifications
| Attribute | Value |
|---|---|
| Socket Type | T25 3157 P27/7W, 3156 P27W |
| Voltage | DC 9-18V (12 V nominal) |
| Lumens | 1200Lm (White) |
| Wattage | 7.5W |
| Current | 0.62A |
| Light Source | 5pcs 3030SMD + 18pcs 4014SMD |
| Light Color Options | White, Red, Yellow/Amber |
| Waterproof Rating | IP65 |
| Item Weight | 35g |
| Item Type | Brake lights, Clearance Lights |
| Origin | Mainland China |
4. Installation (Setup)
These LED bulbs are designed for straightforward, plug-and-play installation. Always ensure your vehicle's ignition is off and the lights are cool before beginning installation.
Installation Steps:
- Identify Bulb Location: Locate the existing halogen bulb you wish to replace (e.g., DRL, turn signal, brake light, reverse light).
- Remove Old Bulb: Carefully twist or pull out the old halogen bulb from its socket.
- Insert LED Bulb: Insert the AUXITO LED bulb into the socket. Due to its non-polarity design, it can be inserted in either orientation.
- Test Functionality: Turn on your vehicle's ignition and test the light function to ensure proper operation.
- Secure Bulb: Once confirmed working, secure the bulb and reassemble any covers or housing.
Important Considerations:
- Size Compatibility: The size of these LED bulbs is comparable to standard halogen bulbs, making them convenient to install in most applications.
- CAN-BUS Systems: For European and newer vehicles equipped with a CAN-BUS system, especially when used as turn signals or brake lights, load resistors may be required to prevent error codes or hyper-flashing. If you experience these issues, external load resistors may be necessary.

Image 5: Size comparison of the AUXITO LED bulb with a standard halogen bulb, showing similar dimensions for easy fitment.

Image 6: Detailed dimensions of the LED bulb, highlighting its non-polarity and plug-and-play features.
5. Operation
Once installed, the AUXITO T25 3157 LED bulbs operate in conjunction with your vehicle's existing lighting system. They are designed to function as direct replacements for various applications:
- Daytime Running Lights (DRL)
- Turn Signal Lights
- Backup Reverse Lights
- Tail Bulbs
- Brake Lights
- Parking Lights
- Position Lights
The bulbs will illuminate and extinguish according to the vehicle's electrical signals for the respective lighting function.

Image 7: Illustration of the wide application of the LED bulb, suitable for backup reverse lights, brake stop lights, parking lights, and driving daytime running lights.

Image 8: Visual comparison demonstrating the bright light output of AUXITO LED bulbs compared to the dim yellow light of traditional halogen bulbs, shown on a car's rear lights.

Image 9: Display of the three available light color options: White, Yellow, and Red, showing the appearance of the bulbs and their emitted light.
6. Maintenance
AUXITO LED bulbs are designed for long-term, maintenance-free operation. No regular maintenance is required beyond ensuring they are clean and free from debris.
- Cleaning: If necessary, gently wipe the bulb's surface with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Inspection: Periodically check the bulbs for any signs of damage or loose connections.
7. Troubleshooting
While AUXITO LED bulbs are designed for reliability, certain issues may arise. Here are common troubleshooting tips:
Common Issues & Solutions:
- Hyper-flashing or Error Codes: If your vehicle's turn signals flash rapidly (hyper-flashing) or you receive dashboard error messages after installing the LED bulbs, this typically indicates a CAN-BUS system incompatibility. This product includes a built-in load resistor for most vehicles, but some strong CAN-BUS systems (e.g., Jeep, Fiat, Alfa, Opel) may still require additional external load resistors.
- Bulb Not Lighting Up:
- Ensure the bulb is correctly seated in the socket.
- Check the vehicle's fuse for the corresponding light circuit.
- Verify the vehicle's voltage is within the DC 9-18V operating range.
- Dim or Flickering Light:
- Ensure the connection is secure and free from corrosion.
- Check for any loose wiring in the vehicle's lighting circuit.

Image 10: Close-up view of the LED bulb highlighting the built-in load resistor and IC driver, designed for Canbus error-free performance.
8. User Tips
- Verify Fitment: Although these bulbs are designed for common T25 3157/3156 sockets, always double-check your vehicle's specific bulb type before purchase and installation to ensure compatibility.
- Handle with Care: While durable, LED bulbs contain sensitive electronic components. Handle them carefully during installation to avoid damage.
- Observe Local Regulations: Ensure that the color and brightness of the installed lights comply with local automotive lighting regulations.
9. Warranty and Support
AUXITO stands behind the quality of its products.
Warranty:
All AUXITO products, including these T25 3157 LED bulbs, come with a 1-year warranty service from the date of purchase. This warranty covers manufacturing defects and quality problems. In the event of a quality issue, AUXITO will provide a replacement item or a refund.
Please note that AUXITO reserves the right to charge for the cost of delivering a replacement item under certain conditions.

Image 11: AUXITO 1 Year Warranty badge, signifying guaranteed quality and free replacement.

Image 12: Information about AUXITO as a top brand and details regarding the 1-year warranty service.





