{"nhtsa_id":10132284,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-04-02","date":"2013-04-17","document_id":"T-SB-0053-13","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"After initial start-up in cold weather conditions, the front windshield defroster pattern may not meet customer expectations. An updated A/C amplifier is available that improves the front windshield defroster pattern.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10132284-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10132284-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10132284","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"TOYOTA","model":"SIENNA","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_toyota_sienna","2012_toyota_sienna","2013_toyota_sienna"]}],"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":[]}