{"nhtsa_id":10052587,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2013-08-19","date":"2013-08-19","document_id":"CSC-81312015","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM","mfr_system":null,"summary":"TOYOTA: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CERTAIN VEHICLES FAILED TO HAVE THE POSITIVE TEMPERATURE COEFFICIENT (PTC) HEATER RELAYS INSTALLED AT TIME OF MANUFACTURED. MODELS 2011-2012 COROLLA. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10052587","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"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":[]}