Acura ADX key fob battery
Every model year listed for the Acura ADX has 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.
- 2025Smart key (two-way keyless remote)
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Models with two-way keyless remote ... Battery type: CR2032”
Find CR2032 on Amazon - 2026Smart key (two-way keyless remote)
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Models with two-way keyless remote ... Battery type: CR2032”
Find CR2032 on Amazon
Changing the battery
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.
- 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.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
Acura smart keys usually open the same way as Honda's: release the built-in key, then twist in the slot.
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.