How to Replace Chrysler 300 Key Fob Battery: Step-by-Step Guide for Hassle-Free Use

Ever found yourself locked out of your Chrysler 300 because of a dead key fob battery? Frustrating, right? Don’t worry, you’re not alone. It happens to the best of us. But what if you could easily replace the key fob battery yourself and save time and money on a trip to the dealership? Sounds like a game-changer, doesn’t it?

In this article, you’ll uncover the simple steps to change the key fob battery in your Chrysler 300 hassle-free. No more waiting around or shelling out extra cash for a quick fix. With just a few minutes of your time and a new battery, you’ll be back on the road in no time. Get ready to take control of the situation and empower yourself with the knowledge to tackle this common issue head-on.

Step 1: Gather the necessary tools

To begin changing the key fob battery on your Chrysler 300, you’ll need the following tools:

  • New replacement battery compatible with your key fob
  • Small flat-head screwdriver or a coin
  • Precision or small Phillips-head screwdriver
  • Tweezers (optional, but helpful for handling small components)
  • Clean cloth or towel

Make sure to have these tools ready before proceeding to the next steps in replacing your key fob battery.

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Step 2: Locate the key fob battery compartment

Let’s dive into finding the key fob battery compartment in your Chrysler 300.

  • Get ready to discover the exact spot where your key fob’s battery is nestled.
  • Look for a small indentation or groove on the side of your key fob.
  • Once located, grab your small flat-head screwdriver or coin.
  • Insert the screwdriver or coin into the groove and gently twist to pry open the cover.
  • Voila! The key fob battery compartment should now be revealed to you.

Step 3: Remove the old battery

  • Locate the battery: It’s typically a small, circular battery. Carefully remove it.
  • Dispose of the old battery properly: Check local regulations for safe disposal methods.
  • Handle the new battery carefully: Avoid touching the battery’s contact points.
  • Position the new battery: Ensure it’s facing the correct direction.
  • Secure the cover back: Gently press on it until you hear a click.
Key Points
Always handle batteries with care.
Dispose of the old battery according to local guidelines.

Step 4: Replace the battery with a new one

It’s time to replace the old battery with a fresh one to ensure your Chrysler 300 key fob works smoothly. Here’s how you can do it:

  • Locate the new battery and handle it with care to avoid any damage.
  • Position the battery correctly in the slot, ensuring the polarity matches.
  • Secure the cover back in place to protect the battery and ensure it stays in position.

By following these steps, you can successfully replace the battery in your Chrysler 300 key fob.

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Step 5: Test the key fob

After replacing the battery in your Chrysler 300 key fob, it’s crucial to test if the new battery is working effectively. Here’s how you can do it:

  • Stand within a reasonable distance from your car.
  • Press the lock or unlock button on the key fob.
  • Observe if the car locks or unlocks in response to the button press.
  • Try using the key fob multiple times to ensure consistent performance.

Remember to test your key fob periodically to catch any issues early and maintain hassle-free use.


That’s it! You’ve now learned how to easily change the battery in your Chrysler 300 key fob. Remember to test the key fob near your car, check for a prompt response, and ensure its consistent performance. By testing it regularly, you can catch any issues early on and enjoy seamless use of your key fob. Keep these simple steps in mind to keep your key fob working smoothly.

Frequently Asked Questions

How do I test my Chrysler 300 key fob after replacing the battery?

After replacing the battery, stand near your car, press the lock or unlock button, observe the response, and ensure consistent performance by testing it multiple times. Regular testing helps identify any issues early on and ensures hassle-free use of the key fob.

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Battery industry professional with 5+ years of experience. Bachelor of Science in Electrical Engineering from Georgia Tech. Specializes in power systems and renewable energy.

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