Is your 2009 Toyota Prius key fob acting up? Experiencing issues like reduced range, beeping after turning off your car, or a flashing key icon on your dashboard? These are common signs that your key fob battery is getting weak and needs replacing. Don’t worry, this is a simple DIY task you can easily handle yourself. Since your Prius relies on this electronic key and lacks a traditional mechanical key start, it’s crucial to replace the battery promptly when you notice these warning signs. Typically, these original Panasonic batteries last around 3 to 5 years, which isn’t too bad for the convenience they offer.
This guide will walk you through the process of changing your 2009 Prius Key Fob battery. It’s based on the official Toyota Prius Owner’s Manual, but presented with clear, step-by-step instructions and helpful images to ensure you can complete this maintenance task with confidence.
Tools Needed:
- Precision Philips head screwdriver (#0 is ideal)
- Small flat-head screwdriver or paperclip
Parts/Supplies Needed:
- CR2032 Battery ( Lithium 3V) – This is the standard battery for most Prius key fobs.
Let’s get started with the battery replacement process:
Step 1: Remove the Emergency Key
With the buttons on your 2009 Prius key fob facing upwards, locate the small spring-loaded release. Slide this holder to the left (indicated in RED in the image above) and simultaneously pull the emergency key upwards and out (indicated in BLUE). This will detach the mechanical key from the key fob body.
Step 2: Open the Key Fob Casing
Now, flip the key fob so the buttons are facing down. Locate the spring-loaded holder again, and this time slide it to the right (RED). While holding it in this position, push the back panel of the key fob upwards (BLUE). This back panel should slide off relatively easily, revealing the internal components of your 2009 Prius key fob. If you encounter any resistance, try using a rubber glove to improve your grip on the fob for better leverage.
Step 3: Access the Battery Compartment
With the back cover removed, you will now see the battery cover plate secured by four small screws. Use your Philips #0 screwdriver to carefully remove these four screws (circled in RED). Once the screws are removed, take your paperclip or thin flat-head screwdriver and gently pry up the battery cover plate. The image above shows a BLUE arrow indicating a good spot to insert your tool and pry.
Step 4: Replace the Old Battery with a New CR2032
With the battery cover plate off, you can now access the old CR2032 battery. Remove the old battery and replace it with a new CR2032 battery. It’s important to ensure you insert the new battery with the positive (+) side facing upwards, towards the cover panel as shown.
Step 5: Reassemble Your Key Fob
Assembly is simply the reverse of the disassembly process.
- Place the battery cover plate back into position and secure it with the four Philips head screws.
- Slide the back panel of the key fob back into place until it clicks securely.
- Finally, slide the emergency key back into the key fob until it locks into position.
Congratulations! You have successfully replaced the battery in your 2009 Prius key fob. Your key fob should now be functioning correctly, restoring its range and eliminating those warning beeps and dashboard icons.
Resources:
- Toyota Prius Owner’s Manual
- Prius Key FOB Transmitter – Luscious Garage – Additional insights into Prius key fob technology.
- YouTube tutorials – Search for “Prius key fob battery replacement” for video guides.
By following these straightforward steps, you’ve saved yourself a trip to the dealership and ensured your 2009 Prius key fob is powered up and ready to go!
