2020 Jeep Wrangler Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2020 Jeep Wrangler does not support DIY, on-board programming for its key fobs. This means you won't be able to program a new key fob yourself using a sequence of actions like turning the ignition on and off.

For security reasons and due to the advanced immobilizer system in modern vehicles like the 2020 Jeep Wrangler, programming a new key fob requires specialized diagnostic equipment. This equipment communicates with the vehicle's computer system (BCM – Body Control Module) to register the new fob's unique identification code.

Therefore, you will need to take your vehicle to a certified Jeep dealership or a professional automotive locksmith to have a new key fob programmed.

Battery replacement

1. Locate the small release button or tab on the side of the key fob. Press or slide it to release the emergency key blade. Pull the emergency key blade out.
2. With the emergency key blade removed, you'll see a slot or seam. Use a small, flat-head screwdriver or a coin to carefully pry open the two halves of the key fob casing.
3. Gently separate the two halves. You will see the circuit board and the battery. Note the orientation of the old battery before removing it.
4. Carefully pop out the old CR2450 battery.
5. Insert the new CR2450 battery, ensuring the positive (+) side is facing up (or as it was in the original orientation).
6. Align the two halves of the key fob casing and firmly press them together until they snap securely into place.
7. Reinsert the emergency key blade.

Where to buy a replacement fob

• Jeep Dealership:

  • Pros: Guaranteed genuine OEM part, often comes with a warranty, and includes programming. They have the most up-to-date diagnostic tools.
  • Cons: Most expensive option. Expect to pay between $300-$500 for the fob and programming.

• Automotive Locksmith:

  • Pros: More affordable than a dealership, often mobile (they come to you), and can program both OEM and high-quality aftermarket fobs. They typically have sophisticated programming tools.
  • Cons: Prices can vary. Ensure they are reputable and experienced with modern Jeep key systems. Ballpark price for fob and programming is $200-$350.

• Online Retailers (e.g., Amazon, KeylessEntryRemoteFob.com):

  • Pros: Cheapest option for the key fob itself. You can find both OEM and aftermarket options (like Strattec or Keyless2Go).
  • Cons: You still need to pay for programming separately from a locksmith or dealer. Be wary of counterfeit or low-quality fobs; ensure the FCC ID matches. A standalone fob might cost $50-$150, but remember to factor in the programming cost.

If on-board programming isn't supported

As mentioned, the 2020 Jeep Wrangler requires professional programming. The main reason is the advanced immobilizer system. The key fob contains a transponder chip (part of the immobilizer system) that sends a unique, encrypted code to the vehicle's computer. If this code doesn't match what the vehicle expects, the engine will not start, even if the key physically turns the ignition (though the 2020 Wrangler typically uses a push-button start). This is a crucial anti-theft measure.

When budgeting for a new key fob, remember to account for both the cost of the fob itself and the labor involved in cutting the emergency key blade and programming the key fob to your vehicle. A reputable locksmith or dealership will have the necessary equipment to "pre-code" the transponder and then program the remote functions.

Find a mobile locksmith or shop on Repairius.