2017 Toyota Corolla Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2017 Toyota Corolla does not support DIY on-board programming for its key fobs. The vehicle's immobilizer system requires specialized tools and diagnostic equipment to program new fobs. This means you'll need to visit a Toyota dealership or a qualified automotive locksmith to get your new key fob programmed.

The programming process involves connecting a scan tool to the vehicle's OBD-II port, which then communicates with the car's computer to register the new key fob's unique code. This ensures that only authorized keys can start the car, providing a high level of security.

Battery replacement

Replacing the battery in your 2017 Toyota Corolla key fob is a straightforward process:

1. Locate the small release button or switch on the side of the key fob and press it to release the emergency key. Pull out the emergency key.
2. With the emergency key removed, you will see a small slot or notch. Use a small flat-head screwdriver or a coin to gently pry open the two halves of the key fob casing.
3. Carefully separate the two halves. You'll see the circuit board and the battery. Note the orientation of the old battery before removing it.
4. Gently pop out the old CR2032 battery.
5. Insert the new CR2032 battery with the positive (+) side facing up (it usually has a small inscription).
6. Align the two halves of the key fob casing and firmly press them back together until they click securely into place.
7. Reinsert the emergency key into the fob.

Test the key fob to ensure it locks and unlocks your vehicle.

Where to buy a replacement fob

• Toyota Dealership: This is often the most expensive option, but you're guaranteed to get a genuine OEM part and professional programming. Expect to pay anywhere from $200-$400 for the fob and programming.
• Automotive Locksmith: A great middle-ground option. Locksmiths often have access to the same programming tools as dealerships but typically charge less for both the fob and programming services. You might save 25-50% compared to the dealership for a comparable quality fob and service.
• Online Retailers (Amazon, eBay, specialized key fob sites): You can often find aftermarket key fobs for significantly less, sometimes as low as $30-$80. However, be cautious: quality can vary, and you'll still need to pay a locksmith or dealer to cut the key blade (if applicable) and program the fob. Make sure the FCC ID and part number match your original fob for compatibility.

If on-board programming isn't supported

Since the 2017 Toyota Corolla requires professional programming, you'll need to budget for the associated costs. As mentioned, a dealership will be the most expensive, while a reputable automotive locksmith will provide a more cost-effective solution.

The immobilizer transponder in your 2017 Corolla is typically a Texas Instruments DST-AES (G key) or an NXP HITAG-Pro (H key) depending on the specific model and region. This transponder is a small chip embedded in the key fob that communicates with the car's immobilizer system. It's a critical security feature, and the key fob will not start the car unless this transponder is correctly programmed to the vehicle's immobilizer.

When purchasing an aftermarket fob, ensure it specifies compatibility with your Corolla's immobilizer type. A professional locksmith or dealer will verify this during the programming process.

Find a mobile locksmith or shop on Repairius.