{"nhtsa_id":10117521,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-09-14","date":"2017-02-09","document_id":"4VZ-T5Z6X-03","mfr_campaign":null,"replaces":null,"component":"SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION:SPRINGS/BAGS; SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM:SPRINGS/BAGS","mfr_system":null,"summary":"This service bulletin provides instructions on how to replace air springs that may be subject to a blistering condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10117521-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10117521-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10117521","components":[{"id":"suspension","name":"Suspension","parent":null},{"id":"air-suspension","name":"Air suspension","parent":"suspension"}],"codes":[],"topics":[],"vehicles":[{"make":"SPARTAN","model":"ALTERED CHASSIS CABS","year_from":2011,"year_to":2016,"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":[]}