carfobbattery

Scion tC key fob battery

9 of the 12 model years listed for the Scion tC 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.

  1. 2005-2007Key-head remote

    Not confirmed yet

  2. 2008-2013Key-head remote

    CR2016

    FCC ID MOZB41TG

    Two sites agree: bestkeysupply.com (checked Nov 2, 2026)

    Find CR2016 on Amazon
  3. 2011-2016Smart key

    CR1632

    FCC ID HYQ14ACX

    Two sites agree: uhs-hardware.com and americankeysupply.com (checked Nov 2, 2026)

    Find CR1632 on Amazon
  4. 2014-2016Key-head remote

    Not confirmed yet

  5. 2014Key-head remote

    Not confirmed yet

Changing the battery

Key with remote in the head

  1. This type has the buttons built into the key head. The cell is inside that head, between two clipped halves.
  2. Work a thin flat tool into the seam near the blade and twist; go round slowly if it does not open at once.
  3. Inside you may find a small circuit board in a tray. Lift the board out if the cell is underneath, swap the cell with the same side up, and refit the board.
  4. Close the head, check there is no gap, and try the buttons.

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.

Smart key (push-button start)

  1. Most push-button fobs hide a metal backup key. Press or slide its catch and draw the key out first.
  2. Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
  3. Note which side of the old coin cell faces up (usually the side with the writing), lift it out with a plastic tool, and press the new one in the same way.
  4. Close the case until it clicks all the way round, put the metal key back, then try the buttons and a push-button start.

A CR1632 is 16 mm across and 3.2 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.

Other Scion models