{"nhtsa_id":11035165,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-23","date":"2026-07-15","document_id":"08-279-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Heating, Ventilation And Cooling (HVAC) Module Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● B1148-2A - Left Rear Heated Seat Switch - Stuck. Customers may also comment on one or more of the following: ● Rear heated/vented seats stop working. ● The rear heated/vented seat button is not illuminating. This bulletin involves reprogramming the HVAC module with the latest software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035165-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035165-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035165","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["B1148"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2026,"year_to":2026,"match":"exact","vehicle_ids":["2026_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE 4XE","year_from":2026,"year_to":2026,"match":"base","vehicle_ids":["2026_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2026,"year_to":2026,"match":"exact","vehicle_ids":["2026_jeep_grand-cherokee-l"]}],"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":[]}