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March 25, 2022 Service bulletin

Certain 2017-2020 Model Year F-150, 2018-2020 Expedition, and 2018-2020 Navigator Vehicles Equipped with a...

Ford technical service bulletin 21N03-S4 for 2017-2020 Ford F-150, 2018-2020 Ford Expedition and 2018-2020 Lincoln Navigator.

Bulletin number
21N03-S4
Component
Engine and engine cooling
Summary
Certain 2017-2020 Model Year F-150, 2018-2020 Expedition, and 2018-2020 Navigator Vehicles Equipped with a 3.5L GTDI Engine - Cam Phase Replacement. Parts Requirements / Order information - Intake Gaskets HL3Z-9439-A should be inspected and only replaced if damaged. It is no longer required to replace these gaskets.

Owners of these vehicles have filed 1,817 complaints in the engine category.

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