{"nhtsa_id":11013829,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-02-06","date":"2021-05-20","document_id":"SC-20-138","mfr_campaign":"SC-20-138","replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Transit bus HVAC software upgrade to improve performance of the Eberspaecher unit.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013829-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013829-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11013829","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PROTERRA","model":"CATALYST","year_from":2018,"year_to":2019,"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":[]}