{"nhtsa_id":612576,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-06-09","date":"2000-04-01","document_id":"000401","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"CUSTOMER MAY COMPLAIN THAT THE HEATER AND / OR AIR CONDITIONER SWITCH FROM PANEL VENT MODE TO DEFROST MODE AT WIDE OEN THROTTLE ON VEHICLES BUILT BEFORE NOV. 15, 1999. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/612576","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MAZDA","model":"B-SERIES TRUCK","year_from":1998,"year_to":2000,"match":"base","vehicle_ids":["1998_mazda_b-series","1999_mazda_b-series","2000_mazda_b-series"]}],"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":[]}