2021 Jeep Grand Cherokee Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2021 Jeep Grand Cherokee does not support DIY on-board programming for its key fobs. This means you cannot program a new key fob yourself using a series of ignition cycles or button presses. The vehicle's sophisticated security system requires specialized equipment to link a new key fob to the vehicle.

To program a new key fob for your 2021 Jeep Grand Cherokee, you will need to visit an authorized Jeep dealership or a professional automotive locksmith. They have the necessary diagnostic tools and software to perform the programming procedure.

Battery replacement

1. Locate the small release button or tab on the side of the key fob. Press it to release the emergency key blade. Pull the emergency key blade out.
2. With the emergency key removed, you will see a small slot or indentation. Carefully insert a flathead screwdriver or a coin into this slot and gently pry the two halves of the key fob apart.
3. Once the key fob is open, you will see the CR2450 coin cell battery. Note the orientation of the battery (which side is up).
4. Gently remove the old battery and insert a new CR2450 battery, ensuring the positive (+) side is facing the same direction as the old battery.
5. Align the two halves of the key fob and press them together until they click securely into place.
6. Reinsert the emergency key blade.

Where to buy a replacement fob

• Jeep Dealership:

  • Pros: Guaranteed genuine OEM part, often comes with programming included. They will typically have the most up-to-date software for programming.
  • Cons: Most expensive option. Expect to pay anywhere from $300 to $500 or more for the fob and programming.

• Automotive Locksmith:

  • Pros: Often more affordable than the dealership, can provide both OEM and quality aftermarket fobs, and typically offer mobile services for convenience. They have the necessary professional programming equipment.
  • Cons: Prices can vary. Ensure the locksmith is reputable and has experience with modern Jeep vehicles.

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

  • Pros: Potentially the cheapest option for the key fob itself.
  • Cons: You're only buying the physical fob; you'll still need to pay a dealership or locksmith for cutting the emergency key blade and programming. There's also a risk of purchasing a counterfeit or incompatible fob. Always verify the FCC ID and part number before purchasing.

If on-board programming isn't supported

Since on-board programming is not supported for the 2021 Jeep Grand Cherokee, you will need professional assistance. The cost will generally include the key fob itself, the cutting of the emergency key blade (if needed), and the programming service.

Modern key fobs for vehicles like the 2021 Grand Cherokee contain an immobilizer transponder chip that communicates with the vehicle's engine control unit (ECU). This is a critical security feature that prevents the car from starting if an unauthorized key is used, even if the key blade fits the ignition (or if it's a push-to-start system). Programming involves syncing this transponder chip with the vehicle's system, a process that requires specialized scan tools.

Cost Expectations (fob + programming + key cut):

• Dealership: $300 - $500+
• Automotive Locksmith: $200 - $400+

Prices can fluctuate based on your location and the specific services provided. Always get a quote before proceeding.

Find a mobile locksmith or shop on Repairius.