{"nhtsa_id":11025595,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-11-18","date":"2025-11-13","document_id":"TDF-TDFA-TDFB DCS","mfr_campaign":"TDF/TDFA/TDFB","replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Certain Tucson Hybrid (NX4 HEV), Tucson Plug-in Hybrid (NX4 PHEV), Tucson (NX4), and Tucson (NX4M) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. Technical Service Bulletins (TSBs) 25-01-057H-1, 25-01-059H-1 & 25-01-060H-1 provide instructions to perform a software update for the DCU module. Over-the-Air (OTA): This update can also be conducted via OTA. The customer can complete on his/her own if he/she has an active subscription to Hyundai Bluelink. A visit to the dealership is not required.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11025595-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11025595-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11025595","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"TUCSON","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_hyundai_tucson"]},{"make":"HYUNDAI","model":"TUCSON HYBRID","year_from":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_hyundai_tucson"]},{"make":"HYUNDAI","model":"TUCSON PLUG-IN HYBRID","year_from":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_hyundai_tucson"]}],"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":[]}