{"nhtsa_id":10033330,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2010-08-09","date":"2009-12-18","document_id":"TB-01-09-20","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"VOLKSWAGEN: UPDATE PROGRAMMING, TCM, HARSH DOWNSHIFT AFTER EXTENDED HIGHWAY DRIVING. INTERNAL TRANSMISSION PRESSURE DECREASE IN C1 CLUTCH DUE TO ACCUMULATED AIR IN THE C1 OIL CIRCUIT. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10033330","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"software","name":"Software","parent":"electrical"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"VOLKSWAGEN","model":"PASSAT","year_from":2007,"year_to":2007,"match":"exact","vehicle_ids":["2007_volkswagen_passat"]}],"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":[]}