2019 Toyota RAV4: Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

The 2019 Toyota RAV4 does not have an on-board programming procedure for new key fobs. Adding a new key requires specialized diagnostic equipment to communicate with the vehicle's immobilizer system. This process must be performed by a Toyota dealership or a qualified automotive locksmith.

The reason for this is vehicle security. Starting in the mid-2000s, Toyota, like most manufacturers, began integrating the key fob and the immobilizer transponder. The transponder is a tiny chip inside the fob that the vehicle must recognize before it will allow the engine to start. Programming a new transponder requires a scan tool that can access the vehicle's computer and register the new key.

Battery replacement

Replacing the battery in your 2019 RAV4 fob is a simple DIY task:

1. Release the mechanical key. Look for a small release button or lever on the side or back of the fob. Slide it and pull the mechanical key out from the bottom of the fob.
2. Open the case. Insert the tip of the mechanical key (or a small flathead screwdriver) into the slot where the key was and gently twist to pry the two halves of the fob apart.
3. Replace the battery. Note the orientation of the old battery before removing it. It will be a CR2032 coin cell. Slide the new battery into place with the positive (+) side facing up.
4. Reassemble the fob. Snap the two halves of the case back together until they click. Re-insert the mechanical key.

Where to buy a replacement fob

• Toyota Dealership: The most expensive option, but a guaranteed genuine OEM part. A new fob from the dealer can cost $300–$500, plus an additional $100–$200 for programming and cutting the emergency key blade.
• Automotive Locksmith: Often the most cost-effective professional option. Locksmiths have access to OEM and high-quality aftermarket fobs and have the scan tools required for programming. Expect to pay $200–$400 for the fob, programming, and key cutting, all in one mobile service call.
• Amazon/eBay: You can find many fobs online for as little as $50, but be cautious. Many are cheap knockoffs with unreliable electronics that may fail prematurely. You will still need to pay a locksmith or dealer to program the fob and cut the key, and many will not program fobs sourced by the customer due to quality concerns.

If on-board programming isn't supported

As mentioned, the 2019 RAV4 requires a professional with a diagnostic scan tool to program new keys. This is because the key fob is not just a remote for locking and unlocking the doors; it contains a transponder chip that is integral to the vehicle's immobilizer security system.

When a new key is programmed, the tool registers its unique transponder ID with the car's computer. Without this registration, the car will not recognize the key, and even if the remote functions work, the engine will not start. The laser-cut emergency key inside the fob also needs to be cut by a locksmith or dealer with a special machine.

While this adds cost and complexity, it makes your vehicle much more difficult to steal. For a 2019 RAV4, expect to pay a locksmith between $200 and $400 for a new key fob, including the part, programming, and key cutting. The dealership will typically be closer to the $500–$700 range.

Find a mobile locksmith or shop on Repairius.