Is your Toyota Prius key fob starting to act up? Are you experiencing decreased range, intermittent beeping after turning off your car, or seeing the security key icon flashing on your dashboard? These are common signs that your Prius key fob battery is getting weak and needs to be replaced. Don’t worry, this is a straightforward task you can easily do yourself in just a few minutes. This guide will walk you through the process of changing the battery in your 2004-2009 Toyota Prius key fob, saving you time and money compared to visiting a dealership.
It’s important to address a weak key fob battery promptly. Unlike older cars with traditional mechanical keys, your Prius relies entirely on the key fob for keyless entry and starting. Ignoring the warning signs could leave you stranded if the battery dies completely. Typically, the original batteries in these key fobs, often Panasonic CR2032 batteries, last for 3 to 5 years. Proactive replacement when you notice the first signs of weakness ensures you avoid any inconvenience.
Tools You’ll Need
Before you begin, gather these simple tools:
- Precision Phillips Head Screwdriver (#0): Essential for removing the small screws in the key fob. A set like this precision screwdriver kit will work perfectly.
- Thin Flat-Head Screwdriver or Paperclip: Used for gently prying open the battery cover plate.
Parts Required
- CR2032 Battery: You’ll need one CR2032 3V lithium coin cell battery. These are widely available at drugstores, supermarkets, and online retailers.
Step-by-Step Battery Replacement Guide
Follow these easy steps to change the battery in your Prius key fob:
Step 1: Remove the Mechanical Key
With the buttons on your key fob facing upwards, you’ll notice a small, spring-loaded holder. Slide this holder to the left (indicated in RED in the image above). While holding it in this position, pull the mechanical key upwards and out of the fob (indicated in BLUE). Set the mechanical key aside in a safe place.
Step 2: Open the Key Fob Casing
Now, flip the key fob over so the buttons are facing down. Locate the spring-loaded holder again. This time, slide it to the right (RED). While sliding it to the right, push the back panel of the key fob upwards (BLUE). This back panel should slide off, revealing the inside of the key fob. If you encounter resistance, try using a rubber glove to improve your grip on the fob for better leverage.
Step 3: Access the Battery Compartment
You will now see the internal components of the key fob and a small battery cover plate secured by four screws. Using your Philips #0 screwdriver, carefully remove the four screws circled in RED in the image. Once the screws are removed, use a paperclip or a thin flat-head screwdriver to gently pry up the battery cover plate. The BLUE arrow in the image indicates a good spot to insert your tool for prying.
Step 4: Replace the Old Battery
With the battery cover plate removed, you can now access the CR2032 battery. Take note of the orientation of the old battery; the positive (+) side should be facing upwards, towards the cover panel. Remove the old battery and insert the new CR2032 battery in the same orientation, ensuring the positive (+) side is facing up.
Step 5: Reassemble the Key Fob
Assembly is simply the reverse of the disassembly process.
- Carefully place the battery cover plate back into position and secure it with the four screws you removed earlier. Do not overtighten the screws.
- Slide the back panel of the key fob back into place until it clicks securely.
- Finally, re-insert the mechanical key into the key fob until it locks into position.
You’re Done!
You have successfully changed the battery in your Toyota Prius key fob! Test the key fob to ensure it is working correctly. Your Prius should now respond to the key fob commands without any issues.
Changing your Prius key fob battery is a quick and easy maintenance task that any owner can perform. By following these simple steps, you can avoid the cost and inconvenience of dealership service and keep your key fob working reliably for years to come. Remember to recycle your old battery responsibly at a designated battery recycling location.
This DIY task not only saves you money but also empowers you to maintain your vehicle yourself. Enjoy the peace of mind knowing your Prius key fob is powered up and ready to go!
