Scion iQ key fob battery
2 of the 4 model years listed for the Scion iQ have a proven battery. The most common answer is CR2016. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2012-2013Key-head remote
CR2016
FCC ID MOZB41TGTwo sites agree: bestkeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2016 on Amazon - 2014-2015Key-head remote
Not confirmed yet
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 CR2016 is 20 mm across and 1.6 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.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.