Honda Accord key fob battery
23 of the 31 model years listed for the Honda Accord 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.
- 1996-1997Remote (separate)
Not confirmed yet
- 1998-1999Remote (separate)
CR2025
FCC ID KOBUTAH2T; A269ZUA101Two sites agree: uhs-hardware.com and keylessentryremotefob.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2000-2002Remote (separate)
CR2025
FCC ID KOBUTAH2T; A269ZUA101Two sites agree: uhs-hardware.com and keylessentryremotefob.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2003Unknown
Not confirmed yet
- 2004Unknown (remote transmitter)
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Replacing the Transmitter Battery ... CR1616”
Find CR1616 on Amazon - 2005-2006Unknown (remote transmitter)
CR1616
Two sites agree: uhs-hardware.com and abkeys.com (checked Nov 2, 2026)
Find CR1616 on Amazon - 2007-2008Unknown (remote transmitter)
CR1616
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Replacing the Transmitter Battery ... CR1616”
Find CR1616 on Amazon - 2008Smart key
Not confirmed yet
- 2009-2012Smart key
Not confirmed yet
- 2009-2012Unknown
Not confirmed yet
- 2013Key-head remote
CR1620
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Master Keys with Remote Transmitter ... CR1620”
Find CR1620 on Amazon - 2013Smart key
CR2032
Owner's manual: manualowl.com (checked Nov 1, 2026)
Manual text: “Smart Entry Remote ... CR2032”
Find CR2032 on Amazon - 2014-2015Key-head remote
Not confirmed yet
- 2014-2015Smart key
CR2032
FCC ID ACJ932HK1210ATwo sites agree: americankeysupply.com and energizer.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 - 2017Master key with remote transmitter
Not confirmed yet
- 2017Smart Entry Remote (smart key)
CR2032
Two sites agree: americankeysupply.com and bestkeysupply.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 - 2019-2022Smart Entry Remote (smart key)
CR2032
Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2023-2024Keyless 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
Separate remote fob
- The remote is a small standalone unit. You will not need to touch the ignition key at all.
- Turn it over: some older fobs use one small screw, newer ones just clip. Pry at the seam once any screw is out.
- Swap the cell or cells, keeping the same side up as the old ones.
- 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
- Here the key blade and remote are one piece. You open the plastic head, not the blade.
- Many key heads split along the side seam. Start at the small notch and pry a little at a time.
- Replace the cell with the same face showing, and make sure the rubber keypad sits flat before closing.
- Press the head together until it clicks and test the buttons. The transponder chip that lets the car start is separate from the battery, so starting should not change.
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)
- Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
- Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
- 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.