How to Replace the Key Fob Battery in a Lincoln MKZ

1. Slide the release on the back of the remote control and pivot the cover off.
2. Insert a coin into the slot and twist to separate the housing.
3. Remove the old batteries.
4. Install the new batteries with the + sides facing each other.
5. Put the label back between the two batteries.
6. Reinstall the housing and cover.

• Uses two coin-type three-volt lithium batteries, CR2025 or equivalent.
• Replacing the battery will not delete the transmitter from the vehicle.
• Do not wipe off grease on the battery terminals or the back of the circuit board.

Source: 2015 Lincoln MKZ owner's manual, PDF pages 58, 59. 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.