{"nhtsa_id":11031228,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-04-10","date":"2026-04-03","document_id":"23-010-26","mfr_campaign":null,"replaces":null,"component":"STRUCTURE:BODY","mfr_system":null,"summary":"Intermittent Poor HVAC Performance Customers may comment on the following: SYMPTOM: ● Intermittently the HVAC blows or feels like the output has been reduced resulting in poor performance in cold temperatures. NOTE: This issue only happens in temperatures that fluctuate between freezing and slightly above. The thawing and refreezing process produces a build up of ice on the cowl baffles. This bulletin involves removing both right and left side rubber flaps from the cowl baffles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031228-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031228-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031228","components":[{"id":"structure-body","name":"Body and frame","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2022,"year_to":2026,"match":"exact","vehicle_ids":["2022_jeep_grand-wagoneer","2023_jeep_grand-wagoneer","2024_jeep_grand-wagoneer","2025_jeep_grand-wagoneer","2026_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2022,"year_to":2025,"match":"exact","vehicle_ids":["2022_jeep_wagoneer","2023_jeep_wagoneer","2024_jeep_wagoneer","2025_jeep_wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2026,"year_to":2026,"match":null,"vehicle_ids":[]}],"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":[]}