Do-it-yourself maintenance -> Electronic key battery for Your Toyota Prius 4 Door Fourth Generation (2016-2022)

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6-3. Do-it-yourself maintenance  
Electronic key battery  
Replace the battery with a new one if it is depleted.  
You will need the following items:  
Flathead screwdriver  
Lithium battery CR2032  
Replacing the battery  
1
Release the lock and take out  
the mechanical key.  
2
Remove the cover.  
Use a screwdriver of an appropri-  
ate size. Forcedly prying may  
cause the cover damaged.  
To prevent damage to the key,  
cover the tip of the screwdriver with  
a rag.  
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6-3. Do-it-yourself maintenance  
3
Remove the depleted battery.  
When removing the cover, if the  
battery cannot be seen due to the  
electronic key module attaching to  
the upper cover, remove the elec-  
tronic key module from the cover  
so that the battery is visible as  
shown in the illustration.  
When removing the battery, use a  
screwdriver of an appropriate size.  
Insert a new battery with the “+” terminal facing up.  
When installing, reverse the steps listed.  
4
Use a CR2032 lithium battery  
Batteries can be purchased at your Toyota dealer, local electrical appliance  
shops or camera stores.  
Replace only with the same or equivalent type recommended by the manu-  
facturer.  
Dispose of used batteries according to the local laws.  
If the electronic key battery is depleted  
The following symptoms may occur:  
The smart key system and wireless remote control will not function properly.  
The operational range will be reduced.  
6
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6-3. Do-it-yourself maintenance  
WARNING  
Removed battery and other parts  
These parts are small and if swallowed by a child, they can cause choking.  
Keep away from children. Failure to do so could result in death or serious  
injury.  
NOTICE  
For normal operation after replacing the battery  
Observe the following precautions to prevent accidents:  
Always work with dry hands.  
Moisture may cause the battery to rust.  
Do not touch or move any other component inside the remote control.  
Do not bend either of the battery terminals.  
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