20-25 BMW 3 Series G20/G28/G80 Tail Lights
Installation Guide
Required Tools:
- Trim Removal Tool / Flathead Screwdriver
- 8mm Socket Ratchet
Step 1: Remove Trunk Lid Liner Clips
Open the trunk. Use a trim removal tool to pry out and remove the 10 plastic clips securing the trunk lid liner.
Step 2: Remove Trunk Hinge Arm Covers
Unclip and remove the plastic covers on both trunk hinge arms to fully release the liner.
Step 3: Remove Inner Tail Light Side Trim
Remove the black plastic trim piece located at the edge of the inner tail light (near the license plate area) by pulling it off by hand.
Step 4: Remove OEM Inner Tail Light
Use an 8mm socket ratchet to unscrew the single nut securing the inner tail light. Disconnect the power plug and remove the OEM light.
Step 5: Install New Inner Light & Sequential Setting
Connect the new tail light plug. Note: There is a separate switch plug on the harness. Plug it in for sequential turn signals; unplug it for standard flashing (choose based on preference).
Step 6: Access Outer Tail Light (Peel Back Liner)
Inside the trunk, remove the plastic clips securing the side carpet. Peel back the liner to access the rear of the outer tail light.
Step 7: Remove Water Gutter Trim
Pull up and remove the rubber/plastic water gutter trim located above the outer tail light to reveal the hidden mounting screw.
Step 8: Remove Outer Tail Light Nuts
Use an 8mm socket ratchet to remove the three nuts securing the outer tail light (two on the side, one hidden under the trim removed in the previous step).
Step 9: Replace Outer Tail Light
Pull the old outer tail light straight back to remove it. Disconnect the plug. Connect the new light, push it into position, and secure it with the nuts.
The following section applies ONLY to RGB Models. If you purchased the standard version, your installation is complete.
Note: If the lights do not illuminate after installation, please see the last page:
[Common Issues & Solutions]
Star Light Running
RGB Guide
RGB / App Connectivity Issues
If you are experiencing connection or control issues with the RGB app, please check the following:
Phone Settings & Power: Ensure your phone's Bluetooth is turned ON. Ensure Location Services (GPS) are turned ON (required for Bluetooth scanning on Android).
Important: The vehicle's Running Lights (Parking Lights) must be turned ON to power the Bluetooth module.
Signal Interference: Make sure there are no other strong signal sources inside or near the vehicle that could interfere with the connection.
RGB / App Connectivity Issues
If you are experiencing connection or control issues with the RGB app, please check the following:
Phone Settings & Power: Ensure your phone's Bluetooth is turned ON. Ensure Location Services (GPS) are turned ON (required for Bluetooth scanning on Android).
Important: The vehicle's Running Lights (Parking Lights) must be turned ON to power the Bluetooth module.
Signal Interference: Make sure there are no other strong signal sources inside or near the vehicle that could interfere with the connection.
App Installation & Troubleshooting:
1. Remote Control Pairing:
The remote control comes pre-paired with the lamp. It allows a one-key switch to "Red Light Driving Mode" (static red, no flow animation).
To Re-pair: If the remote does not work, press the brake pedal and hold the remote control button for 10 seconds to complete the pairing.
2. Animation Control:
The RGB lamps allow you to control the running light animations via the APP. (Note: The startup animation is preset and cannot be adjusted.)
3. APP Download:
Search for "LightRunning" (or "Star Light Running") in the App Store/Google Play Store, or scan the QR code on the controller box to download.
4. Bluetooth Connection:
Open the App, click Add Device (Figure 2), enter the Interface (Figure 3), and select the nearby device to complete the Bluetooth connection.
5. How to Adjust Modes:
5.1 Dynamic Mode: The number in the center of the blue box indicates the current mode. Click + or - to switch between different dynamic effects. Click AUTO to cycle through all modes automatically.
5.2 Static Color Mode: Drag the color wheel in the green box interface, or click the preset color buttons to switch to a static, solid color. This will immediately interrupt any playing animation.
5.3 Brightness Adjustment: Drag the slider in the first row of the red box to adjust the brightness.
5.4 Speed Adjustment: Drag the slider in the last row of the red box to change the speed of the animation.
Pro Tip: If you previously used the "Light Running" app and are having connectivity issues, please try downloading "Star Light Running". This is the upgraded version of the App.
Synchronization Check:
Most RGB kits use a physical wire to sync the left and right lights. If you can only control one side via the App, please check the Sync Signal Wire connecting the two lights to ensure it is plugged in securely.
Common Issues & Solutions
1. Tail light does not turn on after installation
Please first check whether the wiring harness connectors are properly connected and fully seated. Inspect the pins inside the connector to ensure none are bent or misaligned.
If any pins are bent, you may carefully straighten them using a paper clip or other small precision tool, then reconnect the plug securely.
2. Swap test
If the tail light still does not illuminate, try swapping the left and right tail lights to determine whether the issue is related to the light unit itself or the vehicle wiring.
3. Condensation inside the tail light
Condensation may occur due to temperature differences, which is a normal physical phenomenon. After the tail light has been operating for a period of time and the internal temperature stabilizes, the moisture will naturally dissipate.
This does not affect brightness, performance, or the lifespan of the tail light.
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