carfobbattery

Cadillac STS key fob battery

Every model year listed for the Cadillac STS has 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. 2005Smart key

    CR2032

    FCC ID M3N65981403

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

    Find CR2032 on Amazon
  2. 2006Smart key

    CR2032

    FCC ID M3N65981403

    Owner's manual: carmanualsonline.info and uhs-hardware.com (checked Nov 1, 2026)

    Manual text: “Use a battery type CR2032 or equivalent.”

    Find CR2032 on Amazon
  3. 2007Smart key

    CR2032

    FCC ID M3N65981403

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

    Find CR2032 on Amazon
  4. 2008Smart key

    CR2032

    FCC ID M3N5WY7777A

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

    Find CR2032 on Amazon
  5. 2009Smart key

    CR2032

    FCC ID M3N5WY7777A

    Owner's manual: carmanualsonline.info and uhs-hardware.com (checked Nov 1, 2026)

    Manual text: “Replace with a CR2032 or equivalent battery.”

    Find CR2032 on Amazon
  6. 2010-2011Smart key

    CR2032

    FCC ID M3N5WY7777A

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

    Find CR2032 on Amazon

Changing the battery

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. Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
  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.

Cadillac smart remotes commonly hide a key behind a side button. With it out, the case opens at the bottom 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.

Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.

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