Install Acura TLX & MDX Welcome Lights (DIY Guide)

Quick answer

Installing genuine Acura welcome lights on your 2021+ TLX or 2022+ MDX is a straightforward DIY job that adds illuminated ground projection when you unlock the doors. The process is nearly identical for both models, but the MDX requires a separate Rear Gutter Attachment Kit.

Installation steps for TLX and MDX welcome lights

1. Gather tools and parts: You will need a trim removal tool or flathead screwdriver wrapped in tape, the welcome light kit, and for the MDX the Rear Gutter Attachment Kit. Park on a level surface and turn off the engine. Common mistake: Forgetting the MDX rear gutter kit. Check your kit contents before starting.
2. Remove the existing side marker light: Use the trim tool to gently pry the bottom edge of the existing side marker housing away from the door panel. Work your way around until the clips release. Disconnect the wiring harness by pressing the tab and pulling the connector apart. Checkpoint: Do not pull on the wires themselves. Always pull the connector body to avoid damaging the pins.
3. Connect the welcome light harness: Plug the new welcome light's wiring harness into the vehicle's connector. You should hear a click when it seats fully. Route the wire so it sits flush inside the door panel cavity without kinking. Common mistake: Forcing the connector backward. Align the tab on the connector with the slot before pressing.
4. Snap the welcome light into the door panel: Align the new light unit with the opening in the door panel. Press firmly until all clips engage. Give it a gentle tug to confirm it is secure. Checkpoint: If the light sits unevenly, remove it and check for any debris or misaligned clips before pressing again.
5. Test the lights: Lock the vehicle, then unlock it using the key fob or door handle. The welcome lights should illuminate white. If they do not, recheck the connector and ensure the vehicle is in a state where the lights are active (e.g., not in accessory mode). Common mistake: Testing with the engine running or doors already open. The lights activate only when unlocking from a locked state.
6. Repeat for remaining doors: For the TLX, repeat the process on all four doors. For the MDX, install the front doors first, then use the Rear Gutter Attachment Kit for the rear doors following the same steps. Checkpoint: The MDX rear door kit has a slightly different clip pattern. Follow its included instructions for that specific step.

Products used in this guide

• Genuine Acura 2021+ TLX Welcome Lights: Fits all 2021+ Acura TLX including RHD and international models. Factory accessory part number 08V27-TGV-200. White LED lights illuminate the ground when the vehicle is unlocked. This is the correct part for the TLX and does not require any additional mounting kit for installation.

  

• Genuine Acura 2022+ MDX Puddle Welcome Lights: Fits all 2022+ Acura MDX including RHD and international models. Factory accessory part number 08V27-TYA-200. White LED lights illuminate the ground when the vehicle is unlocked. Requires Rear Gutter Attachment Kit. The MDX kit needs the separate Rear Gutter Attachment Kit for rear door installation, so plan your purchase accordingly.