2016-2023 Tesla Model S DRL Flickering or Dim? Here's the Fix

TL;DR

On 2016-2023 Tesla Model S, the daytime running lights commonly fail because the LED board or light guide strip degrades from heat and UV exposure. The fix is to replace the DRL light guide strip and LED board, a plug-and-play part that restores your DRLs in about 1-2 hours without coding.

What Goes Wrong with Tesla Model S DRLs?

The DRL light guide is a clear plastic strip that distributes light from an LED board. Over time, heat cycling and UV exposure cause the guide to yellow and the LEDs to weaken, leading to dim or dead DRLs. Moisture can also seep in, corroding the board.

Diagnosing the Issue

Check if one or both DRLs are dim or out. Inspect the light guide for yellowing or cracks, and look for condensation inside the housing. If the LEDs flicker or don't light, the board is likely faulty. A simple test: swap the left and right LED boards—if the problem moves, it's the board.

Step-by-Step Replacement

1. Disconnect the 12V battery and remove the front bumper for access. 2. Unbolt the headlight assembly and pull it out. 3. Remove the old light guide and LED board by releasing the clips. 4. Install the new guide and board, ensuring proper alignment. 5. Reassemble in reverse order. No coding required. Approximate time: 1-2 hours.

Fitment Tips

This part fits 2016-2020 Model S. Ensure the guide is seated evenly to avoid hot spots. Check that all connectors click into place. Pre-shipment QC ensures you receive a functional unit. Backed by a 1-year warranty.

Fix vs Replace

Replacing the entire headlight assembly costs significantly more and takes longer. Our DRL light guide and LED board fix keeps your original housing and costs a fraction of the cost of a new headlight assembly. Install time: 1-2 hours vs several hours for a full assembly swap.

Recommended Solution

For a cost-effective fix that restores your DRLs, use the Tesla Model S DRL Light Guide Strip & LED Board (2016-2020). It's plug-and-play, no coding needed, and comes with a 1-year warranty.

FAQ

Q: Will this fix both DRLs?

A: The part is sold individually; replace both if both are faulty.

Q: Do I need to remove the bumper?

A: Yes, on Model S, bumper removal is required for headlight access.

Q: Is coding required?

A: No, it's plug-and-play.

Q: What if my DRLs are yellowed but still work?

A: Replacing the guide and board will restore clarity and brightness.