Scion iM key fob battery
Every model year listed for the Scion iM has 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.
- 2016Key-head remote (wireless remote control)
CR1620
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Wireless remote control battery ... Lithium battery CR1620”
Find CR1620 on Amazon
Changing the battery
Key with remote in the head
- The remote electronics sit in the plastic head of the key itself, so there is no separate fob to open.
- Many key heads split along the side seam. Start at the small notch and pry a little at a time.
- The coin cell is usually under or on the back of a small board. Keep the rubber button pad in place while you swap the cell.
- Press the head together until it clicks and test the buttons. The transponder chip that lets the car start is separate from the battery, so starting should not change.
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.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.