{"nhtsa_id":11018930,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-06-03","date":"2025-05-02","document_id":"V0122032066602_4","mfr_campaign":"48A2","replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Engine/Motor Control Module J623 Update Programing for low or no heat in cold weather","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018930-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018930-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11018930","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"VOLKSWAGEN","model":"JETTA","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_volkswagen_jetta","2021_volkswagen_jetta"]}],"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":[]}