Honda Civic key fob battery
17 of the 31 model years listed for the Honda Civic 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.
- 1996-2000Remote (separate)
Not confirmed yet
- 2001-2005Remote (separate)
Not confirmed yet
- 2006-2008Key-head remote
Not confirmed yet
- 2008Smart key
Not confirmed yet
- 2009Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Replacing the Transmitter Battery ... CR1616”
Find CR1616 on Amazon - 2009-2012Smart key
Not confirmed yet
- 2010-2011Key-head remote
CR1616
Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR1616 on Amazon - 2012Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Replacing the Transmitter Battery ... CR1616”
Find CR1616 on Amazon - 2013Key-head remote
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Replacing the Button Battery ... CR1616”
Find CR1616 on Amazon - 2013Smart key
Not confirmed yet
- 2014Key-head remote
CR1620
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Master Keys with Remote Transmitter ... CR1620”
Find CR1620 on Amazon - 2014Smart key
Not confirmed yet
- 2015Key-head remote
Not confirmed yet
- 2015Smart key
CR2032
FCC ID ACJ932HK1210ATwo sites agree: bestkeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2016Master key with remote transmitter
CR1620
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR1620 on Amazon - 2016Smart Entry Remote (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2017-2019Master key with remote transmitter
CR1620
Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR1620 on Amazon - 2017-2019Smart Entry Remote (smart key)
CR2032
Two sites agree: bestkeysupply.com and americankeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2020Master key with remote transmitter
CR1620
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR1620 on Amazon - 2020Smart Entry Remote (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2021Master key with remote transmitter
CR1620
Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR1620 on Amazon - 2021Smart Entry Remote (smart key)
CR2032
Two sites agree: bestkeysupply.com and americankeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2022-2023Keyless remote with built-in key (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2024Keyless remote with built-in key (smart key)
CR2032
Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2025Keyless remote with built-in key (smart key)
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2026Keyless remote with built-in key (smart key)
Not confirmed yet
Changing the battery
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.
- The coin cell is usually under or on the back of a small board. Keep the rubber button pad in place while you swap the cell.
- Snap it closed and press each button. The car still starts with a dead remote battery on most of these keys, because the start chip needs no battery.
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 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.
- Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
- Before you take the old cell out, look at its face. Put the new cell in with the same side showing, and avoid touching both faces at once.
- 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.
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.