{"nhtsa_id":10009761,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-10-21","date":"2004-09-03","document_id":"406","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"DUE TO FAULTY SOFTWARE IN THE TOWBAR SYSTEM CONTROL UNIT, THERE IS THE POSSIBILITY THAT THE WARNING MESSAGE CHECK TRAILER LIGHTING IN THE IC WILL BE ACTIVATED WHEN THE RIGHT DIRECTION INDICATOR LIGHT IS SWITCHED ON WITH SIMULTANEOUS BRAKING FOR AT LEAST 3 SECONDS WHEN TOWING A TRAILER. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10009761","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PORSCHE","model":"CAYENNE S","year_from":2003,"year_to":2004,"match":"base","vehicle_ids":["2003_porsche_cayenne","2004_porsche_cayenne"]},{"make":"PORSCHE","model":"CAYENNE TURBO","year_from":2003,"year_to":2004,"match":"base","vehicle_ids":["2003_porsche_cayenne","2004_porsche_cayenne"]}],"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":[]}