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June 30, 2021 Service bulletin

In some of the affected vehicles, moisture and water entering a power door lock actuator housing can

Ford technical service bulletin 21M04 for 2015-2019 Ford F-150, 2017-2019 Ford F-250 SD and 2017-2019 Ford F-350 SD and others.

Bulletin number
21M04
Component
Latches/locks/linkages
Summary
In some of the affected vehicles, moisture and water entering a power door lock actuator housing can cause the actuator motor to momentarily freeze in cold temperatures and may also cause actuator motor corrosion over time. Frozen water within a power door lock actuator housing or corrosion of the power door lock actuator motor could result in an inoperative power door lock function on the affected door.

Owners of these vehicles have filed 254 complaints in the locks category.

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