Acura NSX key fob battery
3 of the 16 model years listed for the Acura NSX have a proven battery. The most common answer is CR2025. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 1996-2002Remote (separate)
Not confirmed yet
- 2003Remote (separate)
CR2025
FCC ID OUCG8D-387H-ATwo sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 2, 2026)
Find CR2025 on Amazon - 2004Remote (separate)
CR2025
FCC ID OUCG8D-387H-AOwner's manual: manualmachine.com and americankeysupply.com (checked Nov 1, 2026)
Manual text: “Battery type: CR2025”
Find CR2025 on Amazon - 2005Remote (separate)
CR2025
FCC ID OUCG8D-387H-ATwo sites agree: manualmachine.com and americankeysupply.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2017-2018Smart key
Not confirmed yet
- 2019-2020Smart key
Not confirmed yet
- 2021Smart key
Not confirmed yet
- 2022Smart key
Not confirmed yet
Changing the battery
Separate remote fob
- A separate fob has no key blade inside, so it opens with nothing but a coin or a small screwdriver.
- 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.
- Close the fob and test it. If it does not work, open it again and check the cell is seated flat.
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.
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.