{"nhtsa_id":10173644,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-04-09","date":"2020-04-08","document_id":"CALFTL49-001","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE","mfr_system":null,"summary":"Customer Advisory Letter for Tailpipe Adaptation to Protect Right-Hand Brake Chamber. Some Business Class M2 vehicles have a horizontal tailpipe with an outlet too close to the forward drive axle, which, over time, may overheat and thereby damage the right-hand brake chamber on that axle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10173644-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10173644-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10173644","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"exhaust-pipe","name":"Exhaust manifold, pipes and muffler","parent":"exhaust-emissions"}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"BUSINESS CLASS M2","year_from":2016,"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":[]}