{"nhtsa_id":11037007,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-09-04","date":"2026-08-06","document_id":"SA-049-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":"HV Battery","summary":"DESCRIPTION For CX-70 PHEV (SC) models, the SC specification includes ECU modifications to extend electric driving range. The BECM (Battery Energy Control Module) inside the high-voltage battery pack must be maintained at C-level or later. REPAIR PROCEDURE When replacing the high-voltage (HV) battery pack, verify the BECM software level. If the level is earlier than C-level, update it to C-level or later and execute configuration after completing the update. 1. Reprogram the BECM with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS). Refer to MDARS ECU Reprogramming Procedure.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037007-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037007-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11037007","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MAZDA","model":"CX-70 PLUG-IN HYBRID","year_from":2026,"year_to":2026,"match":"base","vehicle_ids":["2026_mazda_cx-70"]}],"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":[]}