Honda Odyssey key fob battery
20 of the 31 model years listed for the Honda Odyssey 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.
- 1996-1998Unknown
Not confirmed yet
- 1999Remote (separate)
Not confirmed yet
- 2000-2004Remote (separate)
CR2025
FCC ID A269ZUA101Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2025 on Amazon - 2005-2006Key-head remote
Not confirmed yet
- 2005-2011Remote (separate)
Not confirmed yet
- 2007Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Battery type: CR1616”
Find CR1616 on Amazon - 2008Key-head remote
Not confirmed yet
- 2009Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Battery type: CR1616”
Find CR1616 on Amazon - 2010Key-head remote
Not confirmed yet
- 2011Remote (two button-remote versions)
Not confirmed yet
- 2011-2012Smart key
Not confirmed yet
- 2012Remote (form not stated) - models without power sliding door
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Battery type: CR1616”
Find CR1616 on Amazon - 2012Remote - models with power sliding door (form not stated)
CR2025
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Models with power sliding door ... Battery type: CR2025”
Find CR2025 on Amazon - 2013Key-head remote
CR1616
FCC ID KR55WK49308Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Battery type: CR1616”
Find CR1616 on Amazon - 2013Remote (separate)
Not confirmed yet
- 2013Smart key
Not confirmed yet
- 2014Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Master Keys with Remote Transmitter ... CR1616”
Find CR1616 on Amazon - 2014Smart key
CR2032
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Smart Entry Remote ... CR2032”
Find CR2032 on Amazon - 2015Key-head remote
Not confirmed yet
- 2015Smart key
CR2032
FCC ID KR5V1XTwo sites agree: bestkeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2016Master key with remote transmitter
CR1616
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR1616 on Amazon - 2016Smart Entry Remote (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2017Master key with remote transmitter
Not confirmed yet
- 2017Smart Entry Remote (smart key)
CR2032
Two sites agree: bestkeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2018Smart Entry Remote (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2019-2020Smart Entry Remote (smart key)
CR2032
Two sites agree: americankeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2021-2022Smart Entry Remote (smart key)
CR2032
Two sites agree: americankeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2023-2024Smart Entry Remote (smart key)
Not confirmed yet
- 2025Smart Entry Remote (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2026Smart Entry Remote (smart key)
CR2032
Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon
Changing the battery
Separate remote fob
- The remote is a small standalone unit. You will not need to touch the ignition key at all.
- Find the slot along the edge and turn a coin in it. Go slowly so the clips do not snap.
- Replace the cell, keeping the + side where it was, and check the small metal tab still touches it.
- Snap the case shut and watch for the lights to flash when you press lock at the car.
A CR1616 is 16 mm across and 1.6 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
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
- The remote electronics sit in the plastic head of the key itself, so there is no separate fob to open.
- Work a thin flat tool into the seam near the blade and twist; go round slowly if it does not open at once.
- Replace the cell with the same face showing, and make sure the rubber keypad sits flat before closing.
- Close the head, check there is no gap, and try the buttons.
A CR1616 is 16 mm across and 1.6 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.
- 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.
- 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.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
Honda smart keys typically have a release lever for the built-in key. Twist a coin or the key tip in the slot it exposes to split the case.
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.