{"nhtsa_id":10005662,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-03-10","date":"2003-12-01","document_id":"LZ","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM","mfr_system":null,"summary":"THE OXYGEN SENSOR IN THE EXHAUST SYSTEM COULD FAIL, POTENTIALLY CAUSING A VEHICLE TO EXCEED FEDERAL AND/OR CALIFORNIA EMISSIONS STANDARDS, OR TO EXPERIENCE INCREASED FUEL CONSUMPTION. IF THE OXYGEN SENSOR FAILS, THE VEHICLE'S CHECK ENGINE LIGHT ON THE DASHBOARD WILL ILLUMINATE. LETTER TO AUDI DEALER AND AUDI EMISSIONS RECALL CIRCULAR TO REPROGRAM THE ENGINE CONTROL MODULE (ECM) AND/OR REPLACE ONE OR TWO OXYGEN SENSORS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10005662","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"AUDI","model":"A6","year_from":2003,"year_to":2003,"match":"exact","vehicle_ids":["2003_audi_a6"]}],"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":[]}