2021 Jeep Cherokee Key Fob Programming & Replacement Guide

As a locksmith and ASE-certified electrical technician, I get calls about late-model Jeep Cherokee key fobs every week. If you’ve lost your key or simply want a spare for your 2021 Jeep Cherokee, the process isn't as simple as turning the ignition a few times like it was in the early 2000s. Stellantis (formerly FCA) has significantly upgraded its vehicle security architecture, meaning programming a new fob requires specialized equipment.

Here is your comprehensive guide to the 2021 Jeep Cherokee key fob.

Quick reference

Step-by-step on-board programming

If you are hoping to buy a cheap fob online and program it in your driveway using a button combination, I have bad news: The 2021 Jeep Cherokee does not support on-board (DIY) programming.

Starting in 2018, all Fiat Chrysler Automobiles (FCA) models were equipped with a Secure Gateway Module (SGW). This firewall prevents unauthorized tools from communicating with the vehicle’s immobilizer and RF hub. To program a new key, you must have:

1. An active NASTF (National Automotive Service Task Force) registry to pull the vehicle's unique Immobilizer PIN code.
2. A professional-grade bi-directional scan tool (like an Autel IM608 or Advanced Diagnostics Smart Pro).
3. A 12+8 SGW bypass cable (or an authorized AutoAuth account) to bypass the vehicle's firewall.

Because of this intense security, DIY programming is simply not an option for this vehicle. You must hire a qualified automotive locksmith or visit the local Jeep dealership.

Battery replacement

Even if you can't program a new key yourself, you can easily replace the battery in your existing fob. The 2021 Jeep Cherokee uses a standard CR2032 coin-cell battery.

1. Remove the emergency key: Slide the mechanical latch on the back or bottom of the key fob and pull out the metal emergency key blade.
2. Pry the shell apart: Look into the slot where the emergency key was resting. You will see a small seam dividing the two plastic halves of the fob. Insert a flathead screwdriver (or the tip of the emergency key itself) into this seam and gently twist to pop the shell open.
3. Remove the old battery: Note the orientation of the battery (usually the positive "+" side faces down). Carefully pry it out.
4. Insert the new battery: Place the new CR2032 battery into the slot, ensuring the "+" side is facing the correct direction.
5. Snap the fob back together: Align the two plastic halves and squeeze them together firmly until they click all the way around. Slide the emergency key back in.

Where to buy a replacement fob

When shopping for a replacement 2021 Jeep Cherokee key, you have three main avenues, each with its own pros and cons:

• The Dealership:
  • Pros: Guaranteed to work; you get genuine OEM parts.
  • Cons: Very expensive. The fob itself will cost around $180-$250, plus an additional $120-$175 for programming and cutting the emergency blade.
• Automotive Locksmith:
  • Pros: Mobile service means they come to you; typically 20% to 40% cheaper than the dealership; they can supply high-quality aftermarket or refurbished OEM fobs.
  • Cons: You must ensure they have the SGW bypass tools required for 2018+ FCA vehicles.
  • Price: Usually ranges from $180 to $280 total, including parts, cutting, and programming.
• Amazon / Online Retailers:
  • Pros: The key fobs are incredibly cheap (often $30-$60).
  • Cons: Many locksmiths will refuse to program customer-supplied aftermarket fobs. Low-quality aftermarket fobs for Jeeps often fail during the programming procedure or lose their proximity function after a few months. If it fails, you still have to pay the locksmith for their time.

If on-board programming isn't supported

As mentioned, since on-board programming isn't supported on the 2021 Cherokee, you'll be dealing with an advanced proximity immobilizer system. The Jeep relies on an AES transponder chip embedded on the fob's circuit board. When you press the push-to-start button, the vehicle's RF hub checks for this authorized chip.

If all your keys are lost, the locksmith will need to gain access to the interior, connect a bypass cable behind the radio or under the dash to bypass the SGW, read the PIN code, and program the new transponder to the RF hub. Expect an "All Keys Lost" situation to cost upwards of $300 to $400 depending on your location, so it is highly recommended to get a spare made before you lose your only key.

Find a mobile locksmith or shop on Repairius.