How to Replace the Key Fob Battery in a Lincoln Navigator

Steps from the 2010 Lincoln Navigator owner's manual (Integrated Keyhead Transmitter (IKT)).

Twist a thin coin in the slot of the IKT near the key ring to remove the battery cover.
Take out the old battery.
Insert the new CR2032 battery, following the orientation shown inside the IKT, and press it down until fully seated.
Snap the battery cover back onto the key.

Uses one coin type three-volt lithium battery CR2032 or equivalent.
Do not wipe off the grease on the battery terminals on the back of the circuit board.
Replacing the battery will not deprogram the IKT from your vehicle.

Source: 2010 Lincoln Navigator owner's manual, PDF page 141. 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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