How to Change the Key Battery on a Ford Flex

Model: Ford Flex MK 1 - Years: 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Part: Key

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If you need to replace the key battery on this vehicle model, the instructions below provide the steps for a proper replacement. First, purchase a new battery identical to the one installed.

Start by extracting the emergency key, then use a small screwdriver to pry at the junction between the cover and the key to remove it. Behind the cover, you will find the battery, which you can remove with the screwdriver and replace with the new one, ensuring the polarity is correct.

Then, reattach the cover and insert the key back into its housing.

Updated on 27 July 2026 by ScegliAuto

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by ScegliAuto

How to Change the Key Battery on a Ford Flex

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