Is your Chrysler key fob struggling to lock or unlock your doors? You might be facing a common issue: a dead or dying key fob battery. Fortunately, replacing the battery in your Chrysler key fob is a straightforward process that you can easily handle yourself. This guide will walk you through the steps on how to replace your Chrysler key fob battery, saving you time and a trip to the dealership.
Identifying Your Chrysler Key Fob and Battery Type
Before you begin, it’s crucial to identify the type of key fob you have and the correct battery it requires. Chrysler has used various key fob designs over the years, but most modern ones utilize a similar battery replacement process.
The most common type of battery for Chrysler key fobs is the CR2032 or CR2016 3V lithium coin cell battery. You can usually find the specific battery type indicated inside the battery compartment of your key fob or in your vehicle’s owner’s manual.
- Locate your key fob type: Examine your key fob. Is it a simple remote with buttons, or is it integrated with the key itself (a “fobik” or integrated keyhead transmitter)? The battery replacement process is generally similar for both.
- Check for markings: Look for a small indentation or seam on your key fob. This is usually where you need to pry it open to access the battery compartment. Some fobs may have a small screw that needs to be removed first.
- Consult your owner’s manual: Your Chrysler owner’s manual is an invaluable resource. It should contain specific instructions for your vehicle’s key fob, including the battery type and replacement procedure.
Chrysler key fob
Step-by-Step Guide to Replacing Your Chrysler Key Fob Battery
Once you’ve identified your key fob and battery type, gather the necessary tools. You’ll typically need:
- New Battery: Make sure it’s the correct type (CR2032 or CR2016 3V lithium coin cell)
- Small Flathead Screwdriver or Pry Tool: A small eyeglass screwdriver or a plastic trim removal tool works best to avoid scratching the fob casing.
- Soft Cloth (optional): To protect the key fob surface during the process.
Now, follow these steps to replace your Chrysler key fob battery:
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Prepare the Key Fob:
- Locate the small notch or seam on your key fob casing.
- If there’s a physical key attached, remove it from the fob. This often reveals a small access point.
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Open the Key Fob Casing:
- Using your flathead screwdriver or pry tool, gently insert the tip into the notch or seam.
- Carefully twist or pry to separate the two halves of the key fob casing. Work your way around the seam slowly to avoid damaging the plastic.
- Some key fobs might require sliding a small release latch before prying open. Refer to your owner’s manual if you’re unsure.
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Remove the Old Battery:
- Once the casing is open, you’ll see the battery compartment.
- Note the orientation of the old battery (+ side up or down). This is important for installing the new battery correctly.
- Gently pry out the old battery. You can use your fingertip or the edge of your screwdriver if needed.
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Install the New Battery:
- Take your new CR2032 or CR2016 battery.
- Install the new battery into the compartment, ensuring the polarity (+ and – sides) matches the original battery’s orientation. Usually, the positive (+) side faces upwards.
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Reassemble the Key Fob:
- Carefully align the two halves of the key fob casing.
- Press them firmly together until they snap back into place. Ensure the casing is fully closed with no gaps.
- If you removed a screw earlier, re-insert and tighten it.
- Re-insert the physical key if you removed it.
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Test the Key Fob:
- Press the lock and unlock buttons to test if the key fob is working. The car doors should lock and unlock, and the panic button should also function.
Opening the Chrysler key fob casing carefully, as shown, is essential to access the battery compartment without damaging the fob.
Troubleshooting: Key Fob Not Working After Battery Change
If your Chrysler key fob still doesn’t work after replacing the battery, here are a few troubleshooting steps to consider:
1. Verify Battery Installation
- Correct Battery Type: Double-check that you used the correct battery type (CR2032 or CR2016). Using the wrong type can cause malfunction.
- Battery Polarity: Ensure the battery is installed with the correct polarity (+ and – sides oriented correctly).
- New Battery Freshness: Although rare, a new battery could be defective or have low charge. Try a different new battery from a reputable brand if you suspect this.
- Battery Contacts: Inspect the metal contacts in the key fob battery compartment. Make sure they are clean and making good contact with the battery. You can gently clean them with a cotton swab and a bit of rubbing alcohol if needed.
2. Key Fob Reprogramming (EVIC Method)
In some cases, particularly with older Chrysler models, the key fob might need to be reprogrammed after a battery change. If your Chrysler vehicle is equipped with an EVIC (Electronic Vehicle Information Center), you might be able to reprogram the key fob yourself without a trip to the dealership.
- Check your Owner’s Manual for EVIC Programming: Your owner’s manual will have specific instructions if your vehicle supports EVIC key fob programming. Look for sections on “Remote Keyless Entry (RKE) transmitter programming” or similar.
- General EVIC Programming Steps (Example – may vary by model):
- Enter your vehicle and close all doors.
- Turn the ignition to the “ON” position (without starting the engine).
- Navigate through the EVIC menu using the steering wheel controls to find options like “Vehicle Settings,” “Personal Settings,” or “Remote Key Programming.”
- Select “Train Remote” or “Program Remote.”
- The EVIC will likely display instructions, often prompting you to “Press Remote LOCK & UNLOCK then press UNLOCK.”
- Simultaneously press and hold the Lock and Unlock buttons on the key fob for a few seconds, then press the Unlock button again as instructed by the EVIC.
- The vehicle may chime or provide another indication that the programming was successful.
- Repeat for any additional key fobs you want to program.
- Turn the ignition “OFF” to exit programming mode.
- Test all programmed key fobs.
Important Notes on EVIC Programming:
- Single Remote Programming: As mentioned in the original forum, some Chrysler models with EVIC can program a single remote even without a previously working remote. However, this can be model and year specific.
- Erasing Previous Programming: Be aware that initiating the EVIC programming sequence may erase all previously programmed key fobs. You might need to reprogram all your remotes at once if you use this method.
- Procedure Variations: EVIC menu options and programming steps can vary significantly between Chrysler models and years. Always consult your owner’s manual for the precise procedure for your vehicle.
Vehicles equipped with an EVIC system, like this Chrysler 300M, may offer onboard key fob programming options accessible through the menu.
3. When to Seek Professional Help
If you’ve tried battery replacement, verified battery installation, attempted EVIC programming (if applicable), and your Chrysler key fob still isn’t functioning, it might be time to seek professional help.
- Dealership Visit: Your local Chrysler dealership has specialized equipment to diagnose key fob and remote keyless entry system issues. They can reprogram key fobs, diagnose potential receiver module problems, and provide replacement key fobs if needed.
- Automotive Locksmith: A qualified automotive locksmith is another excellent option. They often offer mobile services, can program key fobs, and may be more cost-effective than a dealership for key fob-related issues.
Reasons to Consider Professional Help:
- Suspected Key Fob Damage: If your key fob has been dropped, gotten wet, or shows signs of physical damage, internal components might be faulty.
- Receiver Module Issues: The problem might not be the key fob itself, but rather the vehicle’s receiver module that communicates with the key fob. This requires professional diagnosis.
- Lack of EVIC or Programming Knowledge: If your vehicle doesn’t have EVIC programming, or you are uncomfortable with the programming procedures, professional assistance is recommended.
Conclusion
Replacing your Chrysler key fob battery is usually a simple DIY task that can restore the convenience of remote locking and unlocking. By following these steps and troubleshooting tips, you can often resolve key fob battery issues quickly and efficiently. However, if you encounter persistent problems or suspect more complex issues, don’t hesitate to seek assistance from a Chrysler dealership or a qualified automotive locksmith to ensure your remote keyless entry system is functioning correctly.
