2021-2022-2023 Toyota Sienna Key Fob Battery Replacement Guide (CR2450)
If your 2021, 2022, or 2023 Toyota Sienna Limited Platinum key fob is acting up—minimal range, especially in the cold, or needing to hold it super close to the ignition button—it’s likely time for a battery swap. Here’s a straightforward guide to get your key fob back in top shape.
TL;DR: Replace your 2021 Toyota Sienna Limited Platinum key fob battery with a CR2450 battery to restore optimal performance. This is the battery that I used and it is working perfectly. 🔋✅
Step-by-Step Guide to Replacing Your Key Fob Battery
What You’ll Need:
- CR2450 Battery: This is the correct battery type for your key fob. Ensure you have a fresh one on hand.
- Small Flathead Screwdriver: Useful for prying open the key fob casing.
Steps:
- Locate the Seam: Hold your key fob and find the seam where the two halves meet.
- Pry Open the Fob: Gently insert the flathead screwdriver into the seam and twist to separate the two halves. Be cautious to avoid damaging the plastic.
- Remove the Old Battery: Once open, you’ll see the old CR2450 battery. Carefully remove it, noting its orientation (which side is facing up).
- Insert the New Battery: Place the new CR2450 battery in the same orientation as the old one. Ensure it’s seated properly.
- Snap the Fob Back Together: Align the two halves of the key fob and press them together until they snap securely.
- Test the Key Fob: Stand a reasonable distance from your Sienna and test the key fob functions to ensure everything works correctly.
Additional Tips:
- Emergency Start: If your key fob battery dies and you need to start your vehicle, you can hold the key fob close to the start button while pressing it. This method allows the vehicle to detect the key fob even with a dead battery.
For a visual demonstration, check out this helpful video:
By following these steps, you can ensure your key fob remains reliable, saving you from the frustration of limited range or unresponsive buttons.
Replacement battery available here at a good price with fast shipping.
I hope this info helps, enjoy your Sienna!
PS Earlier models, from 1999 to 2020, typically use the CR2032 battery.