{"nhtsa_id":10000539,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-03-24","date":"1999-07-27","document_id":"9909A","mfr_campaign":null,"replaces":"9909","component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"ISC-POWERED EMERGENCY VEHICLES EXPERIENCING POOR ENGINE PERFORMANCE AND SHUTDOWN DUE TO RATE SHAPE SNUBBER, LUBE OIL COOLER AND BELT TENSIONER FAILURES. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10000539","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"ISC","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":[]}