Mazda CX-9 key fob battery
16 of the 17 model years listed for the Mazda CX-9 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.
- 2007Flip key
CR1620
FCC ID BGBX1T478SKE125-01Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Put in the new battery (CR1620 or equivalent)”
Find CR1620 on Amazon - 2007-2009Smart key
CR2025
FCC ID BGBX1T458SKE11A01Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2008-2011Flip key
Not confirmed yet
- 2010-2013Smart key
CR2025
FCC ID WAZX1T763SKE11A04Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2012-2013Flip key
CR1620
FCC ID BGBX1T478SKE125-01Owner's manual: manualslib.com and americankeysupply.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR1620 or equivalent).”
Find CR1620 on Amazon - 2014Flip key
Not confirmed yet
- 2014-2015Smart key
Not confirmed yet
- 2015Flip key
CR1620
Owner's manual: manualslib.com and manua.ls (checked Nov 2, 2026)
Manual text: “Replace only with the same type battery (CR1620 or equivalent).”
Find CR1620 on Amazon - 2016Smart key
CR2025
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2025 or equivalent).”
Find CR2025 on Amazon - 2017Smart key
CR2025
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2025 or equivalent).”
Find CR2025 on Amazon - 2018Smart key
CR2025
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2025 or equivalent).”
Find CR2025 on Amazon - 2019Smart key
CR2025
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2025 or equivalent).”
Find CR2025 on Amazon - 2020Smart key (Type A, with auxiliary key slot)
CR2025
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Type A: Use CR2025 or an equivalent.”
Find CR2025 on Amazon - 2020Smart key (Type B)
CR2032
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Type B: Use CR2032 or an equivalent.”
Find CR2032 on Amazon - 2021Smart key
CR2032
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2032 or equivalent).”
Find CR2032 on Amazon - 2022Smart key
CR2032
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2032 or equivalent).”
Find CR2032 on Amazon - 2023Smart key
CR2032
Owner's manual: mazdausa.com (checked Nov 1, 2026)
Manual text: “Replace only with the same type battery (CR2032 or equivalent).”
Find CR2032 on Amazon
Changing the battery
Flip key
- Fold the blade out so it is out of the way, or keep it folded if your case opens from the side; the battery sits in the plastic body, not the blade.
- Look along the edge for a notch. A coin turned in that notch usually separates the remote half from the blade half.
- Take out the old cell, noting which side faced you, and fit the new one the same way.
- Close it up, check the blade still flips cleanly, and test the buttons at the car.
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.
Smart key (push-button start)
- Most push-button fobs hide a metal backup key. Press or slide its catch and draw the key out first.
- 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.
- 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.
- Close the case until it clicks all the way round, put the metal key back, then try the buttons and a push-button start.
Mazda advanced keys usually have a knob or button that frees the auxiliary key; the cover lifts once the key is out.
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.
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.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.