{"nhtsa_id":10133330,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-04-16","date":"2018-02-16","document_id":"Dealer Letter -","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","mfr_system":null,"summary":"Over time and mileage and under certain conditions, the factory-installed catalysts may not perform as required by Federal regulations. If the effectiveness of a catalyst is reduced, this may result in an increase in tailpipe emissions and the vehicle could fail to pass an emissions inspection. Launch repair availability for A8 (criteria 4E) and A6 (criteria 4F).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10133330-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10133330-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10133330","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"catalytic-converter","name":"Catalytic converter","parent":"exhaust-emissions"}],"codes":[],"topics":[],"vehicles":[{"make":"AUDI","model":"A6","year_from":2008,"year_to":2011,"match":"exact","vehicle_ids":["2008_audi_a6","2009_audi_a6","2010_audi_a6","2011_audi_a6"]},{"make":"AUDI","model":"A8","year_from":2008,"year_to":2008,"match":"exact","vehicle_ids":["2008_audi_a8"]}],"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":[]}