How to Change the Battery in a Toyota Rav4 Smart Key Fob?

by Phil Borges // in Car

Toyota Rav4 smart key fob remotes are popular because they provide a convenient way to lock and unlock your car. They also offer an easy way to start the engine without having to insert the key in the dashboard. The one downside is that they have a limited battery life, which means you need to replace the battery regularly if you want your Toyota smart key remote control to function properly. This article will teach and guide you on how to change the batteries for Toyota Rav4 keys and get back on track with life.

How to change Toyota Rav4 key battery?

Toyota Rav4 owners know that the key fob remote is one of the most essential parts of owning a Toyota. Unfortunately, most key fobs come with a battery that will eventually need to be replaced and Rav4 remote battery replacement is a must.

Luckily, Toyota Rav4 key battery replacement or changing the battery in this remote is easy and only requires a new, inexpensive replacement fob battery. Here’s your guide on how to replace the battery in your Toyota Rav4 fob remote.

First, remove the physical key from the remote and split the fob remote case in half by prying it off with a flat head screwdriver, or you can use the physical key alone. Be careful when prying apart the key fob casing, as the internal components may pop out and go flying.

Second, take out the old battery from the key fob with the use of a small plastic prying tool or a flat head screwdriver. Dispose of the old battery the right way.

Third, insert a new battery and make sure to follow the correct battery orientation where the side of the battery with the ‘+’ sign should be facing up. It’s best to purchase the same kind of battery that came with your Toyota Rav4 smart remote when it was purchased, so you can ensure compatibility. For your guidance, this key fob uses a CR2032 3V Lithium battery.

Lastly, re-check if the new battery is secured in place. You may want to run a quick test first by pressing any button on the key fob to see if it’s working or not before closing up the key fob case. Make sure that all sides snap back into place and the key fob is securely fastened. Return the physical key fob back to the remote, and you’re good to go!

How to tell if the Toyota Rav4 key battery is depleted?

Signs that the battery in your Toyota Rav4 key fob has reached a low charge include:

-When you press the buttons on the remote, it feels quite sluggish and unresponsive.

-The keys/buttons seem more complex to press than usual as if it needs more power to do so.

-When you press the buttons on the remote, there are no specific lights that turn on.

-When you lock or unlock your car with the key fob, it doesn’t make a noise like usual.

-The remote stops working entirely and doesn’t respond to any of the commands.

How to start Toyota Rav4 with dead key fob battery?

You can still unlock the door and start your Toyota Rav4 with a dead key fob battery. You can follow the two easy steps:

Step 1: Remove the physical key from the key fob and use it to unlock the driver’s door side.

Step 2: Place your foot on the brake pedal and hold the key fob near the start button. The car will recognize the smart key fob and allow the engine to start even when the battery is dead.

Don’t leave your key fob with a dead battery for a long time. It is best that you change the battery as soon as it shows signs of battery failure. It is also ideal if you have a spare battery in your car at all times in case the battery on your key fob dies.


The Toyota Rav4 smart key fob is powered by a battery that will eventually lose its charge. When this happens, you’ll need to replace battery in Rav4 key fob. On average, the battery in the key fob will last between 1 and 2 years, but this varies depending on how often it is used and what kind of battery you use. As always, if your key fob isn’t working as expected or has stopped powering up completely, then you must contact a professional for assistance.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.