How to Replace the Key Fob Battery in a Acura ILX

Steps from the 2022 Acura ILX owner's manual (Models with remote control engine start system).

Remove the built-in key.
Pry the upper half of the cover off carefully at the edge with a coin.
Press down on the center of the assembly and remove the battery.
Install the new battery with the correct polarity.

Battery type: CR2032.
Wrap the coin with a cloth to prevent scratching, and remove the cover carefully to avoid losing the buttons.
Replace the battery if the indicator does not come on when the button is pressed.

Source: 2022 Acura ILX owner's manual, PDF pages 555, 554. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.

Confirm with your own manual, dipstick or door-jamb label.
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