{"nhtsa_id":39554,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-11-01","date":"1993-06-01","document_id":"640293(3738)","mfr_campaign":null,"replaces":"640293(3738)","component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"IHKR SUDDEN LOSS OF HEAT OR AIRFLOW. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/39554","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"318","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"BMW","model":"325","year_from":null,"year_to":null,"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":[]}