2019 Jeep Wrangler Key Fob Programming

Quick reference

Step-by-step on-board programming

The 2019 Jeep Wrangler does not support DIY on-board programming for new key fobs. This vehicle utilizes an advanced security system that requires a diagnostic scan tool to program new fobs to the vehicle's immobilizer system. This procedure typically involves connecting a specialized scan tool to the vehicle's OBD-II port, reading the existing key data, and then performing a secure programming sequence to add the new fob.

Attempting to program a fob without the correct tools can lead to issues with vehicle starting and security. Therefore, this process must be performed by a qualified automotive locksmith or a Jeep dealership.

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 of the fob.
2. With the emergency key removed, you will see a small slot or indentation on the side of the fob casing. Insert a small flathead screwdriver or a coin into this slot.
3. Gently twist the screwdriver or coin to pry open the two halves of the key fob casing. Be careful not to damage the internal components.
4. Once the case is open, you will see the circular CR2450 battery. Note its orientation (which side is up).
5. Gently pry out the old battery using a small non-metallic tool or your fingers.
6. Insert the new CR2450 battery, ensuring that the positive (+) side is facing the same direction as the old battery.
7. Align the two halves of the key fob casing and firmly press them together until they snap securely into place.
8. Reinsert the emergency key blade into the fob until it clicks.
9. Test the fob's functionality (lock, unlock, panic) to ensure the new battery is working correctly.

Where to buy a replacement fob

• Dealer: Jeep dealerships can provide OEM replacement fobs and program them. Pros: Guaranteed genuine part, expert programming. Cons: Most expensive option, typically ranging from $300-$500, including the fob and programming.
• Automotive Locksmith: Mobile or shop-based locksmiths specializing in automotive keys can often provide and program aftermarket or OEM-equivalent fobs. Pros: More affordable than the dealership, often convenient mobile service. Cons: Quality of aftermarket fobs can vary, so ensure they offer a warranty. Expect to pay between $150-$300 for the fob and programming.
• Online Retailers (e.g., Amazon, eBay): You can purchase replacement fobs online. Pros: Cheapest option for the fob itself. Cons: You are still responsible for programming and key cutting. Many online fobs are aftermarket and may not always be of the highest quality or fully compatible. Prices for the fob alone can range from $50-$150. You'll then need to factor in programming and key cutting costs from a locksmith.

If on-board programming isn't supported

As established, the 2019 Jeep Wrangler does not support DIY on-board programming. This means you will need to rely on professional services for programming new key fobs. The key fob contains a transponder chip (part of the immobilizer system) that needs to be securely linked to your vehicle's onboard computer (PCM). A locksmith or dealer uses specialized diagnostic equipment to perform this "handshake" between the new fob and the vehicle.

Cost Expectations:

• Programming Only: If you purchase a pre-cut fob online and only need programming, a locksmith might charge $75-$150 for the service. Make sure the fob is compatible before purchasing.
• Key Blade Cutting: The physical emergency key blade within the fob will also need to be cut to match your vehicle's existing key. This usually costs an additional $20-$50 at a locksmith or hardware store. Without a properly cut emergency key, you won't be able to manually unlock the door if the fob battery dies or the vehicle's battery is dead.

Immobilizer Transponder: The 2019 Jeep Wrangler uses a sophisticated immobilizer system where the key fob contains a transponder chip that communicates wirelessly with the vehicle