carfobbattery

Acura TSX key fob battery

7 of the 11 model years listed for the Acura TSX have a proven battery. The most common answer is CR2025. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.

  1. 2004-2005Remote (separate)

    CR2025

    FCC ID OUCG8D-387H-A

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

    Find CR2025 on Amazon
  2. 2006Remote (separate)

    CR2025

    FCC ID OUCG8D-387H-A

    Owner's manual: manua.ls (checked Nov 1, 2026)

    Manual text: “Battery type: CR2025”

    Find CR2025 on Amazon
  3. 2007Remote (separate)

    Not confirmed yet

  4. 2008Remote (separate)

    CR2025

    FCC ID OUCG8D-387H-A

    Owner's manual: manualsdir.com (checked Nov 1, 2026)

    Manual text: “Battery type: CR2025”

    Find CR2025 on Amazon
  5. 2009Key-head remote

    CR1616

    Owner's manual: manualsdir.com (checked Nov 1, 2026)

    Manual text: “Battery type: CR1616”

    Find CR1616 on Amazon
  6. 2009-2012Smart key

    Not confirmed yet

  7. 2010-2012Key-head remote

    Not confirmed yet

  8. 2013Key-head remote

    CR1616

    Owner's manual: manualsdir.com (checked Nov 1, 2026)

    Manual text: “Battery type: CR1616”

    Find CR1616 on Amazon
  9. 2013Smart key

    Not confirmed yet

  10. 2014Key-head remote

    CR1616

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

    Find CR1616 on Amazon
  11. 2014Smart key

    Not confirmed yet

Changing the battery

Separate remote fob

  1. The remote is a small standalone unit. You will not need to touch the ignition key at all.
  2. Turn it over: some older fobs use one small screw, newer ones just clip. Pry at the seam once any screw is out.
  3. Swap the cell or cells, keeping the same side up as the old ones.
  4. Reassemble and test from a short distance.

A CR2025 is 20 mm across and 2.5 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.

Key with remote in the head

  1. Here the key blade and remote are one piece. You open the plastic head, not the blade.
  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. 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 CR1616 is 16 mm across and 1.6 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.

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