LED Sidemarkers for the 2010–2014 Ford Mustang are a direct plug-and-play replacement for the factory sidemarker lights — front and rear. No cutting, no splicing, no permanent modifications. Just brighter, cleaner lighting that drops right into the OEM locations. Here's the full install walkthrough covering both the rear and front sidemarkers.
Watch the full install video below, or scroll down for the step-by-step written guide.
Table of Contents
- Installation Video
- Tools Required
- Rear Sidemarker Installation
- Front Sidemarker Installation
- Questions About the Install?
- Shop Mustang LED Sidemarkers at Ess K Customs
Installation Video
Tools Required
- 7mm socket wrench
- 10mm socket wrench
- Phillips screwdriver
- Non-marring trim tool (optional)
Time Required: Approximately 45–60 minutes.
Rear Sidemarker Installation
Step 1 — If you have a non-marring trim tool, try inserting it at the back of the rear sidemarker and pushing forward toward the front of the vehicle. If it pops free, skip ahead to Step 5. Otherwise, remove the three screws in the wheel well using a Phillips screwdriver or socket with bit.
Step 2 — Using a 10mm socket wrench, remove the two nuts on the back of the sidemarker. Push the sidemarker out from the bumper.
Step 3 — Twist the factory bulb socket counterclockwise to remove it from the sidemarker, then remove the bulb.
Step 4 — Plug the connector from the new LED sidemarker into the socket. Check polarity by pressing the unlock button on your key fob — if the sidemarker doesn't illuminate, flip the connector 180 degrees.
Step 5 — Twist the plug back into the new sidemarker to seal it. Place the sidemarker back into the bumper and tighten the nuts on the rear. Do not overtighten. Reinstall the wheel well liner and screws. Repeat for the opposite side.
Front Sidemarker Installation
Step 6 — Using a 7mm socket wrench, remove the three screws in the wheel well. Pull the wheel well liner back just enough to access the sidemarker.
Step 7 — Pull back on the bumper to access the sidemarker. Press the clip toward the front of the vehicle and push the sidemarker out of the bumper.
Step 8 — Twist the factory plug counterclockwise to remove it from the sidemarker and remove the bulb. Plug the connector from the new LED sidemarker into the socket. Verify polarity and flip the connector 180 degrees if needed.
Step 9 — Twist the plug back into the new sidemarker to seal it. Place the sidemarker back into the bumper, clip it into place, and reinstall the wheel well liner and screws. Repeat for the other side.
Questions About the Install?
If you run into any issues during the installation, contact Ess K Customs — as an authorized Diode Dynamics dealer, we're here to help.
Shop Mustang LED Sidemarkers at Ess K Customs
Ready to upgrade your Mustang's sidemarkers? As an authorized Diode Dynamics dealer, Ess K Customs carries genuine products with full manufacturer warranty.
Shop LED Sidemarkers for 2010-2014 Ford Mustang →
This install guide applies to Diode Dynamics SKUs: DD5058, DD5060, DD5059