The first thing you will need to do is look closely at your key fob.

Prius key fob battery. 5 steps to replace the battery in a prius key fob. To start the car, insert the key into the ignition and turn it to the on. Thus it will surely discharge after a certain timeline.

Prius keys use a battery to function. Make sure you know the type of battery you need and keep a spare one. How do i change the battery in my 2010 prius key fob?

Install the new cr2032 battery in the key fob and reinstall the key cover. The only difference is the. Stick a flat bladed screwdriver in the hole that the mechanical key came out.

How to change the battery in a prius key fob. Again, no luck, the fob battery drained. Unscrew the battery compartment on the rear, replace the battery, then reassemble the key to change the battery.

Pull the physical key out. Test new key fob battery: Unlock your prius with a dead key fob.

There should be a little button along the side. Remove the key from the rest of the housing. Replacing the battery on the prius key fob without a “smart key system” is the same as above.