{"nhtsa_id":52147,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-07-17","date":"1997-04-16","document_id":"ITB97022","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM","mfr_system":null,"summary":"QX4 ENGINE HEATER. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/52147","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"INFINITI","model":"QX4","year_from":1997,"year_to":1997,"match":"exact","vehicle_ids":["1997_infiniti_qx4"]}],"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":[]}