2019 Subaru Crosstrek — Key Fob Programming

Quick reference

Step-by-step on-board programming

Unfortunately, the 2019 Subaru Crosstrek does not support on-board (DIY) programming for new key fobs. This is because the key fob is not just a remote for locking and unlocking the doors; it also contains a sophisticated immobilizer transponder chip that must be electronically paired with the vehicle's computer. This security measure prevents unauthorized individuals from easily programming a new key and stealing the vehicle.

To program a new key fob, you will need specialized diagnostic equipment that can communicate with the Crosstrek's immobilizer system. This means you have two primary options:

1. Subaru Dealership: A dealership can supply an OEM fob and program it to your vehicle. This is the most reliable, but also the most expensive, option.
2. Automotive Locksmith: A qualified automotive locksmith will have the necessary scan tools and expertise to program an OEM or aftermarket fob to your Crosstrek, often for a lower price than the dealer and with the convenience of mobile service.

Battery replacement

If your key fob has stopped working or has a diminished range, the first and most economical step is to replace the battery. The 2019 Crosstrek fob uses a single CR2032 battery.

Here's how to replace it:

1. Release the emergency key: Look for a small silver button on the back of the fob. Press it down and simultaneously pull the metal key blade out of the fob body.
2. Open the fob case: Insert the tip of the emergency key (or a small flathead screwdriver) into the opening created by removing the key. Gently twist to pry the two halves of the fob apart. Be careful not to apply excessive force, which could crack the plastic.
3. Remove the old battery: The CR2032 battery will be visible inside. Note the orientation of the positive (+) and negative (-) sides. Use your fingernail or a small, non-metallic tool to carefully pop the old battery out.
4. Insert the new battery: Slide the new CR2032 battery into place, ensuring the positive (+) side is facing up, just like the one you removed.
5. Reassemble the fob: Snap the two halves of the fob case back together until they click securely.
6. Re-insert the key: Slide the metal emergency key back into the fob until it locks into place.
7. Test the fob: Stand near your Crosstrek and test the lock, unlock, and panic functions to ensure everything is working correctly.

Where to buy a replacement fob

• Subaru Dealership: This is your source for a genuine OEM key fob. The main benefit is peace of mind; you know you are getting the correct part, and their technicians are factory-trained. However, this is the priciest route. Expect to pay anywhere from $250 to $400 or more for the fob and programming service.

• Automotive Locksmith: Mobile locksmiths and specialized shops are an excellent alternative. They can often source the same OEM fobs as the dealer or high-quality aftermarket equivalents for a lower price. Their labor rates for programming are also typically more competitive than a dealer's. The total cost might range from $150 to $300. The bonus is that they can often come to you.

• Online (Amazon, eBay, etc.): You can find a wide array of fobs online, from used OEM models to new aftermarket clones, often for under $100. While the initial cost is low, there are risks. You might buy the wrong fob for your specific trim level, or you could receive a low-quality or non-functional unit. Remember, even if you buy a fob online, you will still need to pay a locksmith or dealer to cut the key blade and program the transponder.

If on-board programming isn't supported

As mentioned, the lack of a DIY programming option is due to the vehicle's immobilizer system. The transponder chip inside the key fob must be registered with the car’s electronic control unit (ECU). This is a critical security feature that ensures only authorized keys can start the engine.

The process requires a proprietary Subaru-compatible scan tool to access the immobilizer module via the vehicle's OBD-II port. The technician uses the tool to put the car into a secure "learning mode," and then registers the unique code of the new transponder chip. All existing keys will also need to be present, as they often need to be re-registered at the same time to remain active.

Because this procedure requires expensive equipment and specific knowledge, it is solely the domain of professionals. While it adds to the cost of getting a new key, it provides a high level of security for your investment.

Find a mobile locksmith or shop on Repairius.