Is your 2018 Toyota Corolla key fob not working as reliably as it used to? It might be time for a battery replacement. Like any electronic device, the key fob battery in your Toyota Corolla will eventually need to be replaced. Knowing how to do this yourself can save you time and money. This guide will walk you through everything you need to know about replacing the battery in your 2018 Toyota Corolla key fob.
The key fob for the 2018 Toyota Corolla, and also the Corolla iM and Scion iM models from the same years, uses a CR1620 battery. This is a common type of coin cell lithium battery that is readily available at most drugstores, supermarkets, and online retailers. You won’t need any special tools to replace this battery, just a small flathead screwdriver or something similar to help you open the key fob case.
Identifying Your Key Fob
The key fob we are discussing here is a flip key with 3 buttons: lock, unlock, and panic. It’s designed for the 2017 and 2018 Toyota Corolla iM and Scion iM models. To ensure you have the correct key fob, you can check the FCC ID on the back of your device. The FCC ID for this key fob is HYQ12BFA. This ID is crucial if you ever need to replace the entire key fob, ensuring compatibility with your vehicle’s system. The frequency of this key fob is 315 MHz, and it uses a Texas ID 4D Letter H chip. The part number you might find associated with this key fob is 89070-12C20 or 8907012C20.
Step-by-Step Battery Replacement Guide
Replacing the battery in your 2018 Toyota Corolla key fob is a straightforward process:
- Locate the notch: On the side of your key fob, you’ll find a small notch. This is where you will insert your flathead screwdriver or similar tool.
- Open the case: Gently insert the flathead screwdriver into the notch and twist. This should separate the two halves of the key fob case. Be careful not to use excessive force, as you could damage the plastic casing.
- Identify the battery: Once the case is open, you will see the CR1620 battery. Note the orientation of the battery (+ side up) before removing it.
- Remove the old battery: You can usually pry the old battery out with your fingertip or the edge of the screwdriver.
- Insert the new battery: Place the new CR1620 battery into the compartment, ensuring the + side is facing up, matching the orientation of the old battery.
- Close the case: Carefully snap the two halves of the key fob case back together until they are securely closed.
Important Considerations
- Battery Type: Always use the correct CR1620 battery for your 2018 Toyota Corolla key fob. Using a different type of battery might not work or could potentially damage your key fob.
- Programming: In most cases, you will not need to reprogram your key fob after a simple battery replacement. The key fob should function normally once the new battery is installed.
- Professional Help: If you are uncomfortable replacing the battery yourself, or if you encounter any issues, you can always seek assistance from a professional locksmith or your Toyota dealership. They can replace the battery for you or diagnose any other potential problems with your key fob.
While this guide focuses on battery replacement, remember that information like the FCC ID (HYQ12BFA) and part number (89070-12C20) are essential if you ever need a complete key fob replacement. Always verify these details to ensure compatibility. Replacing your 2018 Toyota Corolla Key Fob Battery is a simple maintenance task that can keep your key fob working reliably for years to come.
