How to Replace the Key Fob Battery in a Acura RDX

Steps from the 2026 Acura RDX owner's manual (Models with and without two-way keyless remote (both use a CR2032 battery)).

Remove the built-in key from the remote.
Pry on the edge of the cover with a flat-tip screwdriver to remove the cover.
Wrap the flat-tip screwdriver with a cloth to prevent scratches.
Replace the battery, making sure the polarity is correct.

Replace the battery if the indicator does not come on when the button is pressed.
Battery type: CR2032.
On two-way keyless remotes, replace the CR2032 every three to four years to protect the integral rechargeable battery.

Source: 2026 Acura RDX owner's manual, PDF pages 624, 625. 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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