Losing the ability to remotely lock or unlock your Chrysler 300 can be a major inconvenience. Often, the culprit is a simple issue: a dead battery in your key fob. Fortunately, changing the battery in your Chrysler 300 key fob is a straightforward process you can easily do yourself, saving you time and a trip to the dealership. This guide will walk you through each step, ensuring you get your key fob back in working order quickly.
What Battery Does a Chrysler 300 Key Fob Need?
Before you start, it’s crucial to have the correct replacement batteries. Chrysler 300 key fobs typically use two CR2016 3V batteries. It’s always a good idea to double-check your owner’s manual or the markings inside your key fob to confirm the exact battery type required for your specific model year. Using the correct batteries ensures optimal performance and longevity for your key fob.
Tools You’ll Need
Changing the battery in your Chrysler 300 key fob is a simple task that requires minimal tools. Here’s what you’ll need:
- New Batteries: Two CR2016 3V batteries.
- Small Flathead Screwdriver or Pry Tool: This will be used to gently open the key fob case. A plastic pry tool is ideal to avoid scratching the fob.
Steps to Replace Your Chrysler 300 Key Fob Battery
Now, let’s get into the step-by-step process of changing the battery in your Chrysler 300 key fob:
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Locate the Notch to Open the Fob: Examine your Chrysler 300 key fob closely. You should find a small notch or indentation on the side or bottom of the fob. This is where you’ll insert your flathead screwdriver or pry tool to open the case.
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Carefully Pry Open the Key Fob: Insert the tip of your flathead screwdriver or plastic pry tool into the notch. Gently twist or pry to separate the two halves of the key fob case. Work your way around the seam if necessary, taking care not to apply excessive force that could damage the plastic casing.
Prying open the key fob to access the battery compartment
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Identify and Remove the Old Batteries: Once the key fob is open, you’ll see the battery compartment. Note the orientation of the old batteries (usually positive side up). You might need to use your fingertip or the small screwdriver to gently pry out the old batteries.
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Insert the New Batteries: Install the new CR2016 batteries, making sure to place them in the correct orientation, matching how the old batteries were positioned. Typically, the positive (+) side of the battery should be facing upwards.
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Reassemble the Key Fob: Carefully align the two halves of the key fob case and press them firmly back together until they snap securely shut. Ensure there are no gaps and that the case is completely closed.
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Test Your Key Fob: Once reassembled, test your key fob by pressing the lock and unlock buttons to see if they now function correctly with your Chrysler 300.
Troubleshooting: Key Fob Not Working After Battery Change
In most cases, simply changing the battery will resolve the issue and your Chrysler 300 key fob will work perfectly again. However, there are instances where you might encounter problems even after a battery replacement. Here are a few troubleshooting tips:
- Check Battery Orientation: Double-check that you inserted the new batteries in the correct orientation. Incorrect placement is a common mistake.
- Battery Voltage: Ensure the new batteries are fresh and have sufficient voltage. You can use a multimeter to check the voltage if you have one.
- Clean Battery Contacts: Inspect the metal contacts in the key fob battery compartment. If they look corroded or dirty, gently clean them with a cotton swab and a bit of rubbing alcohol.
- Resyncing/Reprogramming: In some rare cases, your Chrysler 300 key fob might need to be resynced or reprogrammed to your vehicle after a battery change, especially if the battery was left out for an extended period.
Reprogramming Your Chrysler 300 Key Fob (EVIC Method)
For older Chrysler 300 models (like the 2002 Special mentioned in the forum), you might be able to reprogram the key fob yourself using the Electronic Vehicle Information Center (EVIC) if your car is equipped with one. Here’s a general approach based on user experiences in the forum, but always refer to your owner’s manual for precise instructions for your model year:
- Enter EVIC Menu: Use the buttons on your steering wheel to navigate to the EVIC menu on your dashboard display.
- Find “Program Remote” or Similar Option: Look for an option like “Train Remote,” “Program Remote,” or “Customer Programmable Features” within the EVIC menu.
- Initiate Programming Sequence: Select the “Program Remote” option. The EVIC will likely display instructions, often prompting you to “PRESS REMOTE LOCK & UNLOCK THEN PRESS UNLOCK.”
- Press Buttons on Key Fob: Simultaneously press and hold the Lock and Unlock buttons on the key fob for a few seconds, then release and immediately press the Unlock button again as instructed by the EVIC.
- Confirmation: If successful, the car might chime or the EVIC will display a confirmation message like “TRAIN DONE.”
Important Notes on EVIC Programming:
- Simultaneous Press: The timing and simultaneous pressing of buttons can be crucial. Experiment with holding the Lock and Unlock buttons for a second or two before releasing and pressing Unlock.
- All Remotes: Be aware that using the EVIC programming method might erase previously programmed remotes. Have all the key fobs you want to use with the car present during the programming process.
- Owner’s Manual is Key: Always consult your Chrysler 300 owner’s manual for the exact key fob programming procedure for your specific year and model, as steps can vary.
When to Visit a Dealership
If you’ve tried the battery replacement and EVIC reprogramming methods and your Chrysler 300 key fob still isn’t working, it might be necessary to visit a Chrysler dealership. Dealerships have specialized equipment to diagnose key fob issues and perform more in-depth programming if needed.
Reasons to Consider Dealership Visit:
- No EVIC Programming Option: Not all Chrysler 300 models offer user-programmable key fobs via the EVIC.
- Suspect Key Fob Malfunction: If you suspect the key fob itself is damaged or malfunctioning beyond just a dead battery.
- Lost All Key Fobs: If you have lost all your programmed key fobs, dealership programming is usually required to get at least one working fob again.
Preventing Future Key Fob Issues
To minimize future problems with your Chrysler 300 key fob, consider these tips:
- Timely Battery Replacement: Replace the key fob battery as soon as you notice the range decreasing or the fob becoming less responsive.
- Quality Batteries: Use reputable brands of CR2016 batteries for reliable performance.
- Avoid Extreme Temperatures and Moisture: Protect your key fob from extreme heat, cold, and moisture, which can shorten battery life and damage the internal components.
Conclusion
Changing the battery in your Chrysler 300 key fob is usually a simple fix for remote entry issues. By following these steps, you can often resolve the problem quickly and conveniently at home. Remember to check your owner’s manual for specific instructions for your vehicle and consider dealership assistance if troubleshooting steps don’t solve the problem. Keeping your key fob functioning properly ensures convenient access and security for your Chrysler 300.
