2018 Jeep Grand Cherokee Key Fob Programming

Quick Reference

Step-by-Step On-Board Programming

Unfortunately, the 2018 Jeep Grand Cherokee does not support DIY on-board key fob programming. This means you cannot program a new key fob yourself using a series of ignition cycles or button presses. The vehicle's security system requires specialized diagnostic equipment to link a new key fob to your Grand Cherokee. This is a measure to prevent unauthorized access and theft.

Therefore, you will need to seek assistance from either a Jeep dealership or a professional automotive locksmith to program your new key fob.

Battery Replacement

Replacing the battery in your 2018 Jeep Grand Cherokee key fob is a straightforward process:

1. Locate the release button: On the side or back of the key fob, you'll find a small button. Press and hold it to release the emergency key blade. Pull the blade out.
2. Separate the casing: With the emergency key blade removed, notice a small slot where the key blade was. Carefully use a small, flat-head screwdriver or a coin to gently pry open the two halves of the key fob casing. Work your way around the seam until the casing separates.
3. Remove the old battery: Inside, you'll see the circular CR2032 battery. Note its orientation (which side is up) before removing it. Use a small screwdriver or your finger to carefully pop the old battery out.
4. Insert the new battery: Place the new CR2032 battery into the compartment, ensuring it's oriented correctly with the positive (+) side facing up, just like the old one.
5. Reassemble the fob: Carefully snap the two halves of the key fob casing back together until it's securely closed. Reinsert the emergency key blade.
6. Test the fob: Test all the buttons on your key fob to ensure they function correctly.

Where to Buy a Replacement Fob

When it comes to purchasing a replacement key fob for your 2018 Jeep Grand Cherokee, you have a few options, each with its pros and cons:

• Jeep Dealership:

  • Pros: Guaranteed genuine OEM part, perfect compatibility, often includes cutting the emergency key blade and programming.
  • Cons: Most expensive option. Ballpark price for a key fob, cutting, and programming can range from $300 to $500+. Requires a scheduled appointment.

• Automotive Locksmith:

  • Pros: Can often provide OEM or high-quality aftermarket fobs, typically less expensive than a dealership, offers mobile service (comes to you), and can cut and program on-site. Quicker turnaround.
  • Cons: Quality of aftermarket fobs can vary, so ensure the locksmith uses reputable brands. Ballpark price for a key fob, cutting, and programming can range from $200 to $400.

• Online Retailers (e.g., Amazon, eBay):

  • Pros: Potentially the cheapest option for the key fob itself. Wide variety of OEM and aftermarket choices.
  • Cons: You're only buying the physical fob. You'll still need to pay extra for cutting the emergency key blade and programming by a locksmith or dealer. Risk of purchasing a non-compatible or low-quality aftermarket fob. Ensure the FCC ID and part number match your original fob. Ballpark price for the fob alone can be $50 to $150, plus separate labor costs for cutting and programming.

If On-Board Programming Isn't Supported

As established, on-board programming is not available for your 2018 Jeep Grand Cherokee. This means you will incur costs for both the key fob itself and the programming service.

• Cost Expectations: As mentioned above, expect to pay anywhere from $200 to $500+ depending on whether you go with a locksmith or a dealership, and if you purchase an aftermarket fob or an OEM one.

• Immobilizer Transponder: The key fob for your 2018 Jeep Grand Cherokee contains an immobilizer transponder. This is a crucial security feature that communicates with your vehicle's engine control unit (ECU). Even if you manage to physically cut the emergency key blade to open the door, the vehicle will not start without the transponder being correctly programmed to your Grand Cherokee. This is why specialized equipment is necessary for programming and why DIY methods are not possible for this model.

Find a mobile locksmith or shop on Repairius.