{"nhtsa_id":10172995,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-04-02","date":"2020-03-31","document_id":"26M7CircularREV1","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Under certain high load and/or highway driving conditions vehicle exhaust temperatures may increase catalyst aging, due to thermal stress, which could lead to elevated tailpipe emissions. Added work and claiming instructions in the event muffler flange studs break.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172995-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172995-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10172995","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"AUDI","model":"Q7","year_from":2011,"year_to":2012,"match":"exact","vehicle_ids":["2011_audi_q7","2012_audi_q7"]}],"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":[]}