Some 2020-2023 Escape and 2021-2023 Bronco Sport vehicles equipped with the 1.5L engine may exhibit a...

Bulletin number

SSM 51799

Component

Engine and engine cooling

Summary

Some 2020-2023 Escape and 2021-2023 Bronco Sport vehicles equipped with the 1.5L engine may exhibit a lugging vibration and/or boom noise while driving in gears 5-8 at approximately 1500 engine revolutions per minute (RPM). This may be felt more when the engine is under a light to moderate load. A vibration and/or boom noise could be generated from the firing frequency of the 3 cylinders or when cylinder deactivation occurs and the engine is running on 2 cylinders. This condition is more noticeable when the vehicle is driven in ECO mode. This mode was designed to deliver maximum fuel efficiency and increase the driving range.

Owners of these vehicles have filed 557 complaints in the engine category.