{"nhtsa_id":11021335,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-08-04","date":"2025-07-08","document_id":"S4325 072025","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"CBR - Mack Trucks has identified that certain 2025 model year Mack Medium Duty (MMD) vehicles may have been assembled with insufficient torque on the fan hub retaining hardware.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11021335-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11021335-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11021335","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MD","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_mack_md"]}],"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":[]}