{"nhtsa_id":10083020,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-10-20","date":"2015-05-11","document_id":"FSB 386-009","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"COOLANT LEVEL SENSOR, REPLACEMENT. THE COOLANT LEVEL SENSOR (PART NUMBER 21257608) ON SOME MACK CABOVER TRUCKS BUILT BETWEEN 10/04/2008 AND 02/20/2015 MAY FAIL INTERNALLY. FAILURE OF THE SENSOR CAN CAUSE THE MALFUNCTION INDICATOR LIGHT (MIL) TO ILLUMINATE AND CAN CAUSE AN UNPLANNED STOP IN CASES WHERE THE ENGINE PARAMETER \"ENGINE SHUTDOWN WITH LOW COOLANT\" IS ENABLED.","document":null,"url":"https://open.wenmarpro.com/bulletins/10083020","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"LEU","year_from":2009,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"LR","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_mack_lr","2016_mack_lr"]},{"make":"MACK","model":"MRU","year_from":2009,"year_to":2016,"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":[]}