Mazda Mazda5 key fob battery
2 of the 4 model years listed for the Mazda Mazda5 have a proven battery. The most common answer is CR1620. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2012Flip key
CR1620
FCC ID BGBX1T478SKE125-01Owner's manual: manualslib.com and americankeysupply.com (checked Nov 1, 2026)
Manual text: “Put in the new battery (CR1620 or equivalent)”
Find CR1620 on Amazon - 2013Flip key
Not confirmed yet
- 2014Unknown
Not confirmed yet
- 2015Flip key
CR1620
FCC ID BGBX1T478SKE125-01Owner's manual: manualslib.com and americankeysupply.com (checked Nov 1, 2026)
Manual text: “Put in the new battery (CR1620 or equivalent)”
Find CR1620 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.
- Swap the coin cell, keeping the same face up as the one you removed, and do not bend the metal contact tab.
- Clip the body closed, fold the blade, and test the buttons from a few steps away.
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.
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.