2021 Jeep Wrangler Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

The 2021 Jeep Wrangler does not support on-board programming for its key fobs. This means you cannot program a new key fob yourself using a series of key turns or button presses. The vehicle's advanced security system requires a specialized scan tool to communicate with the vehicle's computer and program new key fobs. This procedure is typically performed by a certified automotive locksmith or a Jeep dealership.

Battery replacement

1. Locate the small release button or switch on the side of the key fob. Press or slide this to release the emergency key blade. Remove the emergency key blade.
2. Look for a small slot or notch where the emergency key blade was removed. This is often where the two halves of the fob meet.
3. Gently pry open the two halves of the key fob using a small, flat-head screwdriver or a pry tool. Work your way around the seam to avoid damaging the plastic.
4. Carefully remove the old CR2450 battery. Note the orientation of the battery (which side is facing up) before removing it.
5. Insert the new CR2450 battery, ensuring it is oriented correctly.
6. Snap the two halves of the key fob back together until they are secure.
7. Reinsert the emergency key blade.

Where to buy a replacement fob

• Jeep Dealership:
  • Pros: Guaranteed to be an OEM part, often comes with a warranty, and they can program it for you on-site.
  • Cons: Most expensive option. A new fob and programming can range from $300 to $500 or more.
• Automotive Locksmith:
  • Pros: Can often provide and program OEM or high-quality aftermarket fobs at a more competitive price than a dealership. Many offer mobile services, coming to your location.
  • Cons: Prices can vary. Ensure the locksmith is reputable and experienced with newer vehicle programming. Expect to pay $200 to $400 for a new fob and programming.
• Online Retailers (e.g., Amazon, eBay):
  • Pros: Often the cheapest option for the physical fob itself. You can find both OEM and aftermarket options.
  • Cons: You still need to get the fob programmed (which you can't do yourself for a 2021 Wrangler). There's a risk of purchasing a counterfeit or incompatible fob. Always verify the FCC ID (M3N-40821302) and part numbers (68442961AD, 68442961AE, 68442961AF) to ensure compatibility. A fob online might cost $50 to $150, but remember to factor in programming costs from a locksmith or dealer.

If on-board programming isn't supported

As mentioned, the 2021 Jeep Wrangler requires specialized equipment for key fob programming due to its advanced immobilizer system. The key fob contains a transponder chip which is part of the vehicle's immobilizer system. This system prevents the car from starting if the correct transponder chip isn't present and recognized by the vehicle's computer. Therefore, simply cutting the emergency key blade will not allow the vehicle to start without proper transponder programming.

Cost Expectations:

• Your primary costs will be the replacement key fob itself and the labor involved in programming it to your vehicle. As outlined above, expect to pay anywhere from $200 to $500+ depending on where you source the fob and who performs the programming.
• Always call ahead to get quotes from multiple locksmiths and dealerships to compare prices and services.

Find a mobile locksmith or shop on Repairius.