{"nhtsa_id":10191048,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-01","date":"2021-04-26","document_id":"WI21-012","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Warranty Information Letter for Detroit Parts Return Guidelines. Service locations are requested to review the letter's notes to ensure onsite parts management practices match to ease the return process for the service.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191048-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191048-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10191048","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FCCC","model":"FCCC","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"FREIGHTLINER","model":"FREIGHTLINER","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"STERLING","model":"STERLING","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"THOMAS BUILT BUSES","model":"THOMAS BUILT BUSES","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"WESTERN STAR","model":"WESTERN STAR","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}