{"nhtsa_id":10051778,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2013-04-11","date":"2012-10-03","document_id":"TC-12-028","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:ELECTRICAL","mfr_system":null,"summary":"TOYOTA: ON SOME MODEL VEHICLES, THE POSITIVE TEMPERATURE COEFFICIENT (PTC) HEATER RELAYS WERE NOT INSTALLED AT TIME OF MANUFACTURED. MODELS 2011-2012 COROLLA. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10051778","components":[{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"TOYOTA","model":"COROLLA","year_from":2011,"year_to":2012,"match":"exact","vehicle_ids":["2011_toyota_corolla","2012_toyota_corolla"]}],"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":[]}