Ford F-150 2011–2021 — technical service bulletin
Bulletin SSM 49761 · NHTSA communication 10191525 · issued Apr 29, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2021
model years
22
vehicle entries
Official summary
Some 2011-2021 Mustang and F-150 vehicles equipped with a 5.0L engine may exhibit a ticking noise at idle after an engine oil change. It is often referred to as typewriter noise because of its similarity to the sound of a mechanical typewriter. The noise in question may be heard on some engines when engine temperatures reach 150F (65à  â  C) or higher and engine speed is at idle up to approximately 1700 RPMs. It can typically be heard at the front wheel well and is often isolated to the transmission bell housing or oil pan area. The typewriter noise is not detrimental to the engine functio
Vehicles covered
- 2011 Ford F-150
- 2012 Ford F-150
- 2013 Ford F-150
- 2014 Ford F-150
- 2015 Ford F-150
- 2016 Ford F-150
- 2017 Ford F-150
- 2018 Ford F-150
- 2019 Ford F-150
- 2020 Ford F-150
- 2021 Ford F-150
- 2011 Ford Mustang
- 2012 Ford Mustang
- 2013 Ford Mustang
- 2014 Ford Mustang
- 2015 Ford Mustang
- 2016 Ford Mustang
- 2017 Ford Mustang
- 2018 Ford Mustang
- 2019 Ford Mustang
- 2020 Ford Mustang
- 2021 Ford Mustang
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.