2019-2026 BMW 3 Series G20/G28/G80 M3 Sequential LED Tail Lights Installation Guide

Important: This online guide is a product-image-verified overview for the matched RIGNOX product. It uses the product page, product reference images, and visible lighting-function details to guide product-side checks. Confirm hidden vehicle-side fasteners, trim clips, and wiring access points on your exact vehicle before removal.

Safety warning: Do NOT use dielectric grease or weather-sealing grease on connectors or sockets. Grease can cause connection problems and may affect warranty coverage.

Matched product

• Product: 2019-2025 BMW 3 Series G20/G28/G80 M3 Sequential LED Tail Lights
• Product type: tail lights
• SKU: T-3G20-SR, T-3G20-RR, T-3G20-SRGB
• Variants: Smoked Red; Red Red; Smoked RGB w/ APP Control
• Fitment: Fits: 2019-2025 BMW 3 Series: G20 (standard wheelbase), G28 (long wheelbase), G80 (M3) - same housing, mounting, and harness; fully interchangeable.
• Product page: View matching RIGNOX product details

Product image checkpoints

• The product reference images show direct-fit, plug-and-play style connection details. Match the supplied connector to the vehicle connector and confirm the lock tab seats fully before reinstalling trim.
• The visible product-function references indicate running/parking light, brake light, reverse light, startup animation, RGB/app function checks for this product. Test each supported function before tightening the lamp and closing the access area.
• If the kit includes a decoder, resistor, control module, or relay, secure it away from heat, moving parts, water paths, and sharp metal edges. Do not add universal electrical parts unless support confirms they are needed.
• RGB or app-controlled lighting is for show/display use where allowed. Confirm standard road-light functions operate normally before using any color mode.

Product notes

• Use the product reference images on this page as the product-side visual check for connector layout, rear housing shape, and lighting functions.
• Original vehicle trim, clip style, and fastener locations can vary by year, trim, and previous repairs. Remove panels slowly and verify each fastener before pulling.
• Road-lighting compliance and off-road/show-use notes are product specific. Review the matching RIGNOX product page for the exact language for this item.

Before you begin

• Confirm the exact product: Compare the RIGNOX tail lights to the product reference images, including rear housing, plug layout, lens style, and included modules.
• Work powered down: Park on level ground, switch the vehicle off, and disconnect the negative battery terminal when handling wiring.
• Protect body panels: Use clean towels or masking tape near painted edges around the tailgate, trunk, hatch, bed-side access, or cargo trim area.
• Do not force clips: If a lamp or trim panel does not move, stop and look for another fastener or locating pin.
• No grease on connectors: Do not apply dielectric grease or weather-sealing grease to connectors or sockets.

Tools and supplies

• Trim removal tool or panel clip tool
• Metric socket and ratchet set; verify exact sizes on the vehicle before removal
• Phillips and flat screwdrivers
• Clean microfiber towels and masking tape
• Electrical tape and zip ties for securing included harnesses only
• A helper for brake-light and reverse-light testing

Remove the original tail lights

1. Remove the trunk lid liner clips: Open the trunk and use a trim removal tool to remove the 10 plastic clips securing the trunk lid liner.
   
2. Remove the trunk hinge arm covers: Unclip and remove the plastic covers from both trunk hinge arms to fully release the liner.
   
   
3. Remove the inner tail light side trim: Pull off the black plastic trim located beside the inner tail light near the license plate area.
   
   
4. Remove the factory inner tail light: Use an 8 mm socket to remove the single retaining nut, disconnect the power connector, and remove the factory inner tail light.
   
   
5. Access the outer tail light: Remove the four plastic clips securing the side carpet inside the trunk, then pull back the liner to access the rear of the outer tail light.
   
   
6. Remove the water gutter trim: Pull up and remove the rubber or plastic water gutter trim above the outer tail light to expose the hidden mounting nut.
   
7. Remove the outer tail light nuts: Use an 8 mm socket to remove the three nuts securing the outer tail light, including the hidden nut beneath the water gutter trim.
   
   

Install the RIGNOX tail lights

1. Install the new inner tail light: Connect the new inner tail light plug. Connect the separate switch plug for sequential turn signals, or leave it disconnected for standard flashing.
   
   
2. Install the new outer tail light: Pull the factory outer tail light straight back and disconnect its plug. Connect all plugs to the new tail light, push it into its original position, and secure it with the three mounting nuts.
   
   
   
3. Test all lighting functions: Activate each rear lighting function and confirm that the new LED tail lights operate correctly.
   
   

Electrical and function test

1. Confirm running/parking lights on both sides.
2. Confirm brake lights with a helper pressing the brake pedal.
3. Confirm left and right turn signals, hazards, and sequential behavior where supported.
4. Confirm reverse lights with the vehicle safely in reverse and the parking brake applied.
5. Confirm startup animation or RGB/app functions only after normal road-light functions pass.
6. Check for dashboard warnings, hyperflash, flicker, or intermittent operation before reinstalling final trim.

Final check

• All connectors are locked, dry, and routed without tension.
• Included modules or extra harnesses are secured away from heat, water paths, moving parts, and sharp edges.
• Both tail lights sit flush with even body gaps and properly seated seals.
• All supported lighting functions pass on both sides.
• No warning lights, flicker, hyperflash, abnormal heat, moisture issue, or loose wiring remains after a short check drive.

Troubleshooting

• One lamp does not turn on: Recheck the main connector lock, related fuse, and battery connection.
• One function does not work: Compare the plug area to the product reference images and verify the connector is fully seated.
• Warning message, flicker, or hyperflash: Confirm the correct product variant was installed and that any included decoder, resistor, or relay is connected and secured.
• Moisture appears: Light condensation may clear as the lamp warms. Heavy or persistent moisture should be documented with photos before continued use.
• RGB/app feature does not respond: Confirm the product variant supports RGB, the controller has power, and the app/controller pairing has been completed.

Need help?

If the original lamp, vehicle connector, or included harness does not match the product reference images, stop before modifying wiring. Contact RIGNOX support with your order information, vehicle year/model/trim, product variant, and clear photos of the connector area, rear housing, mounted body gap, and each lighting function.

End of installation guide. (c) RIGNOX - All Rights Reserved.