Toyota Corolla iM key fob battery
1 of the 2 model years listed for the Toyota Corolla iM have a proven battery. The most common answer is CR1620. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2017Key-head remote (wireless remote control)
CR1620
FCC ID HYQ12BFAOwner's manual: manua.ls and energizer.com (checked Nov 1, 2026)
Manual text: “Wireless remote control battery ... Lithium battery CR1620”
Find CR1620 on Amazon - 2018Unknown
Not confirmed yet
Changing the battery
Key with remote in the head
- Here the key blade and remote are one piece. You open the plastic head, not the blade.
- Many key heads split along the side seam. Start at the small notch and pry a little at a time.
- Replace the cell with the same face showing, and make sure the rubber keypad sits flat before closing.
- Snap it closed and press each button. The car still starts with a dead remote battery on most of these keys, because the start chip needs no battery.
A CR1620 is 16 mm across and 2.0 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
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.