carfobbattery

Subaru Ascent key fob battery

6 of the 8 model years listed for the Subaru Ascent have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.

  1. 2019-2021Key-head remote

    CR1620

    FCC ID CWTB1G077

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR1620 on Amazon
  2. 2019-2021Smart key

    CR2032

    FCC ID HYQ14AHK

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR2032 on Amazon
  3. 2022Key-head remote

    CR1620

    FCC ID CWTB1G077

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR1620 on Amazon
  4. 2022Smart key

    CR2032

    FCC ID HYQ14AHK

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

    Find CR2032 on Amazon
  5. 2023Key-head remote

    CR1620

    FCC ID CWTB1G077

    Owner's manual: bestkeysupply.com and manua.ls (checked Nov 2, 2026)

    Manual text: “Replacing transmitter battery: Button battery CR1620 or equivalent”

    Find CR1620 on Amazon
  6. 2023Smart key

    CR2032

    FCC ID HYQ14AKB / HYQ14AHK

    Owner's manual: uhs-hardware.com and manua.ls (checked Nov 2, 2026)

    Manual text: “access key fob: Button battery CR2032 or equivalent”

    Find CR2032 on Amazon
  7. 2024Key-head remote

    CR2025

    FCC ID CWTB1G496

    Owner's manual: uhs-hardware.com and manua.ls (checked Nov 2, 2026)

    Manual text: “Replacing battery of transmitter: Button battery CR2025 or equivalent”

    Find CR2025 on Amazon
  8. 2024Smart key

    CR2032

    FCC ID HYQ14AKB / HYQ14AHK

    Owner's manual: uhs-hardware.com and manua.ls (checked Nov 2, 2026)

    Manual text: “Replacing battery of access key fob: Button battery CR2032”

    Find CR2032 on Amazon
  9. 2025Smart key

    Not confirmed yet

  10. 2026Unknown

    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. Find the seam around the head. Twist a coin or small flat screwdriver in the notch at the blade end or side until the halves part.
  3. Replace the cell with the same face showing, and make sure the rubber keypad sits flat before closing.
  4. Close the head, check there is no gap, and try the buttons.

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.

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.

Smart key (push-button start)

  1. Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
  2. Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
  3. Before you take the old cell out, look at its face. Put the new cell in with the same side showing, and avoid touching both faces at once.
  4. Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.

Subaru access keys usually hide an emergency key; with it out, the cover opens at the slot.

A CR2032 is 20 mm across and 3.2 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.

Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.

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