carfobbattery

Mazda Protege key fob battery

5 of the 8 model years listed for the Mazda Protege 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. 1996-1998Remote (separate)

    Not confirmed yet

  2. 1999-2000Remote (separate)

    CR2025

    FCC ID KPU41704

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

    Find CR2025 on Amazon
  3. 2001-2003Remote (separate)

    CR2025

    FCC ID KPU41704

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

    Find CR2025 on Amazon
  4. 2002Remote (separate)

    CR2025

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

    Manual text: “CR2025 or the equivalent”

    Find CR2025 on Amazon

Changing the battery

Separate remote fob

  1. This remote is its own fob, separate from the metal key, which makes it one of the easier ones to open.
  2. Find the slot along the edge and turn a coin in it. Go slowly so the clips do not snap.
  3. Swap the cell or cells, keeping the same side up as the old ones.
  4. Close the fob and test it. If it does not work, open it again and check the cell is seated flat.

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.

If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.

Other Mazda models