Scion xB key fob battery
2 of the 11 model years listed for the Scion xB 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.
- 2004-2006Remote (separate)
Not confirmed yet
- 2008-2013Key-head remote
Not confirmed yet
- 2014-2015Key-head remote
CR2016
FCC ID HYQ12BBY / HYQ12BDPTwo sites agree: uhs-hardware.com and energizer.com (checked Nov 2, 2026)
Find CR2016 on Amazon
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.
- 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.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.