Toyota RAV4 Prime / Plug-in Hybrid key fob battery
Every model year listed for the Toyota RAV4 Prime / Plug-in Hybrid has a proven battery. The most common answer is CR2450. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2025Smart key (electronic key)
CR2450
FCC ID HYQ14FBXOwner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Lithium battery CR2450 (items to prepare)”
Find CR2450 on Amazon - 2026Smart key (electronic key)
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Use a CR2032 lithium battery”
Find CR2032 on Amazon
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.
- The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
- 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.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
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.