Nissan Altima key fob battery
20 of the 31 model years listed for the Nissan Altima 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.
- 1996Unknown
Not confirmed yet
- 1997Remote (separate)
CR2025
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Sanyo CR2025 or equivalent.”
Find CR2025 on Amazon - 1998Remote (separate)
Not confirmed yet
- 1999Remote (separate)
CR2025
FCC ID KOBUTA3TOwner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Sanyo CR2025 or equivalent.”
Find CR2025 on Amazon - 2000Remote (separate)
Not confirmed yet
- 2001Remote (separate)
CR2025
FCC ID KOBUTA3TOwner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Sanyo CR2025 or equivalent.”
Find CR2025 on Amazon - 2002-2006Remote (separate)
CR2025
FCC ID KBRASTU15Two sites agree: uhs-hardware.com and americankeysupply.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2005-2006Key-head remote
CR1620
FCC ID CWTWB1U751Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR1620 on Amazon - 2007Smart key
Not confirmed yet
- 2008-2009Smart key
CR2032
FCC ID KR55WK48903Owner's manual: manualsdir.com (checked Nov 1, 2026)
Manual text: “Recommended battery: CR2032 or equivalent.”
Find CR2032 on Amazon - 2010Smart key
CR2032
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Recommended battery: CR2032 or equivalent.”
Find CR2032 on Amazon - 2011Smart key
CR2032
Owner's manual: manualsdir.com (checked Nov 1, 2026)
Manual text: “CR2032 or equivalent”
Find CR2032 on Amazon - 2012Smart key
Not confirmed yet
- 2013Smart key
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Recommended battery: CR2032 or equivalent.”
Find CR2032 on Amazon - 2014Smart key
Not confirmed yet
- 2015Smart key
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Recommended battery: CR2032 or equivalent.”
Find CR2032 on Amazon - 2016-2018Smart key
Not confirmed yet
- 2019Intelligent Key
CR2032
Owner's manual: owners.nissanusa.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2020-2023Smart key
CR2032
FCC ID KR5TXN4Two sites agree: americankeysupply.com and royalkeysupply.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2024Smart key
Not confirmed yet
- 2025Smart key
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Recommended battery: CR2032 or equivalent.”
Find CR2032 on Amazon - 2026Unknown
Not confirmed yet
Changing the battery
Separate remote fob
- The remote is a small standalone unit. You will not need to touch the ignition key at all.
- Look for a screw on the back or a notch on the edge. Remove the screw if present, then twist a coin in the notch to split the case.
- Lift the old coin cell out and press the new one in with matching orientation.
- Snap the case shut and watch for the lights to flash when you press lock at the car.
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.
Key with remote in the head
- Here the key blade and remote are one piece. You open the plastic head, not the blade.
- 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.
- Inside you may find a small circuit board in a tray. Lift the board out if the cell is underneath, swap the cell with the same side up, and refit the board.
- 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.
Smart key (push-button start)
- Find the small release on the edge or back of the fob and hold it while you pull out the metal emergency key.
- The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
- Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
Nissan Intelligent Keys normally hold a mechanical key behind a release knob. With the key out, a small screwdriver in the slot separates the halves.
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.