How to Replace the Key Fob Battery in a Acura MDX

Steps from the 2026 Acura MDX owner's manual (Models without two-way keyless access remote and models with two-way keyless access remote (same steps)).

Remove the built-in key from the remote.
Pry on the edge of the cover with a flat-tip screwdriver to remove the cover.
Take out the old battery and fit the new one, making sure the polarity is correct.

Battery type: CR2032.
Wrap the flat-tip screwdriver with a cloth to prevent scratches.
On two-way remotes, replace the CR2032 every three to four years to protect the integral rechargeable battery.

Source: 2026 Acura MDX owner's manual, PDF pages 661, 662. 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.
Report a problem with this page →