How Our Mail-In Car Key Replacement Service Works

America's Leader in Mail-In Key Replacement

Losing your car key can be stressful—especially if you don't have a spare. Our mail-in car key replacement service makes it fast and easy to get back on the road without a trip to the dealership. Whether you own a BMW, Mercedes, Saab, Toyota, Lexus, Honda, Acura, or Volkswagen, we can help you replace your lost car key by programming a new one using your vehicle’s ECU, immobilizer module, or door lock.

Steps for Key Replacememt

Step 1: Contact Us to Confirm Compatibility

Before sending anything, reach out with your vehicle's year, make, and model. We'll confirm whether we can make a new key for your specific system.

✅ Compatible with:
BMW EWS, Mercedes EIS/ESL, Saab CIM, Toyota/Lexus immobilizer ECUs, Honda/Acura Immo Box, VW Immo boxes & more.

Step 2: Ship Your Module or Door Lock

Depending on your vehicle and situation, you'll send us:

Your ECU, immobilizer module, or key control unit
EITHER a precut key, the key code for your car or your door lock cylinder
Include your contact info and return address

Ship to Golden Key Supply - 340 Sprague Street Daytona Beach, Florida 32117

Step 3: We Program a New Key

Once we receive your parts, we:

Read data from your ECU or lock
Generate a new key or fob with the correct transponder or chip
Program the key to match your vehicle’s original immobilizer

Turnaround Time: Most jobs are completed within 24–48 business hours.

Step 4: We Ship It Back – Ready to Start