{"nhtsa_id":10162421,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-07-10","date":"2019-07-10","document_id":"122011","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; ENGINE","mfr_system":null,"summary":"N54, N54T - Catalytic Converter Conversion Faults Stored. The Service Engine Soon (MIL) lamp could come on with one or both of the following faults stored in the DME: * 29F4: catalytic converter conversion - bank 1 * 29F5: catalytic converter conversion - bank 2 DME software diagnostic error.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10162421-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10162421-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10162421","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"software","name":"Software","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"BMW","model":"Z4","year_from":2009,"year_to":2013,"match":"exact","vehicle_ids":["2009_bmw_z4","2010_bmw_z4","2011_bmw_z4","2012_bmw_z4","2013_bmw_z4"]}],"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":[]}