How to Replace the Key Fob Battery in a Lincoln Aviator

1. Push the release button and pull the key blade out of the remote control.
2. Twist a thin coin under the tab hidden behind the key blade head to remove the battery cover.

• The remote control uses one coin-type three-volt lithium battery, CR2450, or equivalent.
• A message appears in the information display when the remote control battery is low.
• If the battery compartment does not close securely, stop using the remote and keep it away from children.

Source: 2024 Lincoln Aviator owner's manual, PDF page 74. 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.