2019 Ram 3500 Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2019 Ram 3500 does not support DIY, on-board programming for key fobs. This means you cannot use a simple sequence of door openings, key turns, or button presses to program new key fobs yourself. The advanced security systems in these trucks require a specialized diagnostic scan tool to communicate with the vehicle's computer and program new key fobs.

This process typically involves:

1. Connecting a compatible scan tool to the vehicle's OBD-II port.
2. Accessing the vehicle's security module.
3. Following prompts on the scan tool to add or replace key fobs.
4. Often, all existing keys must be present during the programming process to avoid inadvertently deactivating them.

Because of the specialized equipment and technical knowledge required, this procedure is best performed by a certified automotive locksmith or a Ram 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 key blade out.
2. With the emergency key removed, you'll see a small slot or indentation on one side of the fob casing. Use a small flathead screwdriver or a coin to carefully pry the two halves of the fob apart.
3. Once open, carefully remove the old CR2450 battery. Note the orientation of the battery (positive (+) side up or down) before removing it.
4. Insert the new CR2450 battery with the positive (+) side facing the same direction as the old one.
5. Align the two halves of the key fob and press them firmly together until they snap securely into place.
6. Reinsert the emergency key blade into the fob until it clicks.

Where to buy a replacement fob

• Ram Dealership:

  • Pros: Guaranteed genuine OEM part, high-quality programming service, often includes key cutting. Peace of mind from a factory-trained technician.
  • Cons: Most expensive option. Expect to pay anywhere from $250 to $400+ for the fob and programming.

• Automotive Locksmith:

  • Pros: More affordable than a dealership, often offers mobile service (comes to you), can cut and program keys on-site. Locksmiths specialize in vehicle security.
  • Cons: Quality of aftermarket fobs can vary. You'll need to verify the locksmith uses reputable aftermarket brands or can source OEM.
  • Cost: Typically ranges from $150 to $300, including the fob, cutting, and programming.

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

  • Pros: Cheapest option to purchase the fob itself. Wide variety of OEM and aftermarket options.
  • Cons: You're only buying the physical fob; you'll still need to pay for cutting (if applicable) and programming separately. Risk of buying a non-compatible or poor-quality aftermarket fob. Be very careful to match FCC IDs and part numbers.
  • Cost: Fobs can be found for $40 to $100, but remember to add programming and potential cutting costs.

If on-board programming isn't supported

As established, your 2019 Ram 3500 requires a diagnostic scan tool for key fob programming. This is largely due to the sophisticated immobilizer system designed to prevent vehicle theft. The key fobs for your Ram 3500 contain a transponder chip (often integrated into the circuit board) that must be electronically paired with the vehicle's immobilizer system. Without this pairing, even if the key blade is cut correctly, the vehicle will not start (or the remote functions will not work).

When contacting a locksmith or dealership, be sure to inquire about the total cost, which should include:

• The cost of the key fob itself (OEM or quality aftermarket).
• The cost of cutting the emergency key blade (if your fob has one).
• The labor charge for programming the key fob to your vehicle's immobilizer system using their specialized diagnostic equipment.

Always clarify if they can program all existing keys at the same time, as sometimes leaving one out can deactivate it.

Find a mobile locksmith or shop on Repairius.