2023 Ram 3500 Key Fob Programming Guide

As a locksmith and ASE-certified electrical technician, I get asked about Ram truck key fobs constantly. The 2023 Ram 3500 is an incredibly capable heavy-duty truck, but when it comes to the vehicle's anti-theft and immobilizer systems, Stellantis (formerly FCA) has locked things down tight. Modern Ram trucks utilize a highly secure Radio Frequency (RF) Hub and a Security Gateway Module (SGW) that strictly regulates how new keys are introduced to the system.

Here is your comprehensive guide to the 2023 Ram 3500 key fob, covering replacement, programming, and battery maintenance.

Quick reference

Note: Always verify your specific FCC ID on the inside of your original remote or via your VIN at a dealership, as part numbers vary based on features like remote start, air suspension, and power tailgate.

Step-by-step on-board programming

If you are hoping to do a simple "turn the key in the ignition three times and press unlock" dance to program a new fob, I have some bad news. There is absolutely no on-board, DIY programming procedure for the 2023 Ram 3500.

Because of the rolling code transponder system and the integrated Security Gateway (SGW) implemented by Stellantis on all newer vehicles, adding a key to this truck requires a specialized scan tool. Furthermore, to access the RF hub to program a key, a technician must first bypass the SGW (using a specialized 12+8 bypass cable or an active AutoAuth subscription) and pull a unique 4-digit PIN specific to your vehicle's VIN.

Therefore, do not trust internet tutorials claiming you can program a 2023 Ram key at home without expensive diagnostic equipment. It simply isn't possible. You will need to hire a professional.

Battery replacement

Even if you can't program the fob yourself, replacing a dead battery is a quick, 5-minute DIY job. When your dashboard displays a "Key Fob Battery Low" warning, follow these steps:

1. Remove the emergency key: Press the small release button on the side or bottom of the fob and pull the metal emergency key blade out.
2. Open the casing: Look at the slot where the emergency key was resting. Insert a flathead screwdriver or the tip of the emergency key blade into the seam just beside the slot. Twist gently to pry the two halves of the fob apart.
3. Remove the old battery: Carefully lift the circuit board if necessary, and slide the old battery out of its holding bracket.
4. Insert the new battery: Take a fresh CR2032 battery and slide it in with the positive (+) side facing down (or matching the orientation of the battery you removed).
5. Reassemble the fob: Snap the two halves of the plastic shell back together, ensuring a tight seal all the way around to keep moisture out. Reinsert the emergency key blade.

Where to buy a replacement fob

If you've lost your fob or just want a spare, you have a few avenues to consider:

• The Dealership:
  • Pros: Guaranteed OEM part, guaranteed to work with your truck's specific trim and features.
  • Cons: Very expensive. You can expect to pay anywhere from $250 to $350 for the fob alone, plus another $100–$150 for cutting and programming.
• A Local Automotive Locksmith:
  • Pros: Locksmiths are usually entirely mobile and can come to your location (great if you've lost all keys). They often carry high-quality aftermarket fobs that cost significantly less than OEM.
  • Cons: You must ensure they have the proper Stellantis SGW bypass tools. Total cost is usually around $200–$300 for parts, cutting, and programming combined.
• Amazon / Online Retailers:
  • Pros: Extremely cheap up front (sometimes $30–$60 for an aftermarket fob).
  • Cons: Quality is a gamble. Many locksmiths will refuse to program customer-supplied fobs because cheap electronics often fail during the programming process. If the programming fails, you still have to pay the locksmith for their time.

If on-board programming isn't supported

As mentioned, you cannot program this yourself. The 2023 Ram 3500 uses an advanced proximity system utilizing a Hitag AES / 4A chip. This chip must be synchronized to the truck's RF hub using a dealer-level diagnostic scanner (like the wiTECH 2.0) or an advanced aftermarket key programmer (like an Autel IM608 or SmartPRO).

If you lose all your keys, the situation becomes much more dire. The technician must bypass the vehicle's security gateway, pull the PIN code, and program a new fob. In some rare instances with newer locked-down RF hubs, if all keys are lost, the RF hub itself may need to be replaced, which pushes the cost well over $1,000. It is highly recommended to always keep a programmed spare key on hand.

Don't get stranded without a working key. Find a mobile locksmith or shop on Repairius.