Ford Expedition 2015–2020 — technical service bulletin
Bulletin SSM 49355 · NHTSA communication 10183394 · issued Nov 24, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2015–2020
model years
12
vehicle entries
Official summary
Some 2015-2020 F-150 and 2018-2020 Expedition/Navigator vehicles equipped with a 3.5L/2.7L EcoBoost engine and four-wheel drive (4WD) may exhibit an intermittent grinding type noise while driving in two-wheel drive (2WD), most commonly on acceleration. This noise could appear to be turbocharger related. After engineering analysis of returned turbochargers that have been replaced for this condition, no concerns were identified with the turbochargers. The grinding type noise may be related to the 4WD system integrated wheel ends (IWE). To aid in diagnosis, shift the vehicle to 4WD and attempt to
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.