Toyota Corolla Hybrid key fob battery
2 of the 7 model years listed for the Toyota Corolla Hybrid have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2020Smart key
CR2032
FCC ID HYQ14FBNTwo sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2021-2022Smart key
Not confirmed yet
- 2023Key-head remote (vehicles without a smart key system)
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Lithium battery CR2032 (vehicles without a smart key system)”
Find CR2032 on Amazon - 2023Smart key
CR2450
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “CR2450 (vehicles with a smart key system)”
Find CR2450 on Amazon - 2024-2026Smart key
Not confirmed yet
- 2024-2026Unknown
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Most push-button fobs hide a metal backup key. Press or slide its catch and draw the key out first.
- Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
- Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
- Close the case until it clicks all the way round, put the metal key back, then try the buttons and a push-button start.
On most Toyota smart keys the metal key slides out after you press a small release, and the case opens at the slot it leaves behind.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
A CR2450 is 24.5 mm across and 5.0 mm thick, much fatter than a CR2032. A thinner cell will rattle and lose contact, so buy the exact size.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.