{"source":"nhtsa","country":"us","campaign":"25V521000","date":"2025-08-11","owner_notified":"2025-08-21","manufacturer":"Mack Trucks, Inc.","component":"STEERING","summary":"Mack Trucks, Inc. (Mack) is recalling certain 2025 Anthem and 2025-2026 Pioneer vehicles. The dynamic steering and oversteer guidance feature may malfunction and cause a loss of steering control.","consequence":"A loss of steering control increases the risk of a crash.","remedy":"The oversteer guidance feature will be disabled through an over-the-air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0483.","notes":null,"mfr_campaign":"SC0483","part_number":"Software Parameter Feature (Oversteer Guidance) P1HF9","units":32,"completion":{"kind":"quarterly","report_number":5,"period_from":"2026-3","period_to":"2026-3","submitted":"2026-10-07","involved":32,"remedied":32,"unreachable":0,"removed":0,"remedied_percent":100,"as_of":"2026-10-19"},"do_not_drive":false,"park_outside":false,"notification":null,"french":null,"vehicles":[{"year":2025,"make":"MACK","model":"ANTHEM (AN)","vehicle_id":"2025_mack_anthem","match":"base","built_from":"2024-11-04","built_to":"2024-11-04"},{"year":2025,"make":"MACK","model":"PIONEER PR (4)","vehicle_id":"2025_mack_pioneer","match":"base","built_from":"2024-10-22","built_to":"2024-11-08"},{"year":2026,"make":"MACK","model":"PIONEER PR (4)","vehicle_id":"2026_mack_pioneer","match":"base","built_from":"2025-02-24","built_to":"2025-06-23"}],"may_apply":true,"as_of":"2026-10-19","lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null},"attribution":[],"url":"https://open.wenmarpro.com/recalls/nhtsa/25V521000"}