How to Replace the Battery in Your S550 Mustang Key Fob

Over time, the battery in your Mustang's key fob will begin to wear out, and you may notice that the range of the remote start begins to decrease. You'll also receive a notification on the dash that the time has come to replace the battery in your key fob. Luckily, it's a quick and easy process that you can do yourself in just a few minutes. In this video, we'll walk you through the steps so that you can get back on the road in no time.

Steps to Replace 2015-2017 Mustang Key Fob Battery

Step 1: Push down on the key fob release to separate its front and back

Step 2: Wedge fingernail or blade in to separate further

Step 3: Use a coin in the top area to separate the top and bottom battery compartment

Step 4: Replace batteries and lock in place

Step 5: Reassemble

Steps to Replace 2018+ Mustang Key Fob Battery

Step 1: Squeeze the push-button top to reveal key

Step 2: Insert coin to carefully pop off the back plate

Step 3: Replace battery

Step 4: Reassemble

After you complete those steps, it is time to reattach your key fob to your Mustang's keychain. That's it! You've successfully replaced the dead battery in your Mustang key fob!

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