2020 Ram 1500 Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2020 Ram 1500 does not offer a do-it-yourself (DIY) or on-board programming procedure for new key fobs. This is because modern Ram trucks use a sophisticated encrypted immobilizer system to prevent vehicle theft.

Programming a new key fob requires a specialized diagnostic scan tool that can securely communicate with the vehicle's Body Control Module (BCM). This equipment is typically only available to certified automotive locksmiths and Ram dealership service centers. The tool is necessary to register the new fob's unique transponder ID with the truck's immobilizer system, which authorizes it to start the engine.

Therefore, you will need to have a professional locksmith or a Ram dealer program any new or replacement fobs for you.

Battery replacement

Replacing the battery in your 2020 Ram 1500 key fob is a straightforward task you can easily do yourself.

1. Remove the Emergency Key: Locate the small release latch on the side or back of the fob. Slide it and pull the metal emergency key out of the bottom of the fob.
2. Pry Open the Case: Insert the tip of the emergency key (or a small flathead screwdriver) into the slot where the key was removed. Gently twist to pry the two halves of the fob case apart. Be careful not to apply excessive force to avoid cracking the plastic.
3. Access the Battery: Once open, you will see the green circuit board and the circular CR2450 battery.
4. Replace the Battery: Use a small, non-metallic tool to carefully pop the old battery out of its holder. Note the orientation of the positive (+) and negative (-) sides. Slide the new CR2450 battery into place, ensuring it is oriented correctly (usually the "+" side is facing up).
5. Reassemble the Fob: Snap the two halves of the key fob case back together firmly. You should hear a click as it seals.
6. Test the Fob: Test the lock, unlock, and other functions to ensure the new battery is working correctly.

Where to buy a replacement fob

You have several options for purchasing a new fob, each with its own pros and cons:

• Ram Dealership: This is the most expensive option, often costing between $200 and $400 for the fob itself, plus an additional labor charge (typically one hour, ~$100-$150) for programming. The primary advantage is that you are guaranteed to get a genuine OEM part that is correct for your vehicle.
• Automotive Locksmith: A certified mobile or shop locksmith is usually the most cost-effective and convenient professional option. They can source high-quality OEM or aftermarket fobs and have the necessary scan tools to program them on-site. Expect to pay between $150 and $300 total for the fob and programming service. This is often cheaper and faster than a trip to the dealer.
• Online (Amazon, eBay, etc.): You can find a wide variety of aftermarket fobs online, often for as little as $50-$80. While this is the cheapest way to acquire the hardware, the quality can be inconsistent. Crucially, you will still need to hire a locksmith or visit a dealer to have the fob programmed. Some locksmiths may be hesitant to program customer-supplied parts due to reliability concerns, or they may not warranty the service.

If on-board programming isn't supported

As mentioned, the 2020 Ram 1500 requires professional programming. The key fob contains a transponder chip that is part of the vehicle's immobilizer system. Without proper programming, a new fob can be made to lock and unlock the doors, but it will not be able to start the engine. The scan tool procedure pairs this chip to your truck, preventing unauthorized keys from starting the vehicle.

When hiring a professional, always confirm that the price quoted includes both the key fob and the programming service, as well as cutting the emergency key blade inside the fob.

Find a mobile locksmith or shop on Repairius.