{"nhtsa_id":10189981,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-04-06","date":"2021-03-05","document_id":"21-01-017H","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This bulletin provides the service procedure to update the Transmission Control Unit (TCU) software for certain Elantra (CN7/CN7a) vehicles equipped with the 2.0L MPI and Intelligent Variable Transmission (IVT). This update to the damper clutch logic is to address a potential engine stall condition immediately following Forward Collision Avoidance (FCA) activation under specific operating conditions at low engine RPM and low vehicle speeds. In the event a low-speed stall does occur, the engine can immediately be restarted.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10189981-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10189981-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10189981","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"ELANTRA","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_hyundai_elantra"]}],"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":[]}