{"nhtsa_id":10025789,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2008-09-06","date":"2008-05-16","document_id":"PI 663","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM:SOFTWARE","mfr_system":null,"summary":"MACK TRUCK: ENGINE MANAGEMENT SYSTEM (EMS) SOFTWARE UPGRADE - MACK MP8 ENGINES. THE SOFTWARE INCLUDES A REDUCTION IN THE PEAK INJECTION PRESSURE. MODEL AND MODEL YEARS UNKNOWN. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10025789","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"software","name":"Software","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}