{"nhtsa_id":10191525,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-03","date":"2021-04-29","document_id":"SSM 49761","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"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 (65Å’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 function or durability and has no short or long term effects on the engine. This an operating characteristic of the 5.0L engine and no repairs should be attempted.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191525-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191525-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10191525","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-150","year_from":2011,"year_to":2021,"match":"exact","vehicle_ids":["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"]},{"make":"FORD","model":"MUSTANG","year_from":2011,"year_to":2021,"match":"exact","vehicle_ids":["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"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}