{"nhtsa_id":11018474,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-05-20","date":"2025-05-16","document_id":"08-158-25","mfr_campaign":null,"replaces":null,"component":"SUSPENSION","mfr_system":"Air Suspension Control Module","summary":"\"Flash: Air Suspension Control Module (ASCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● U0300-00 - Internal Control Module Software Incompatibility. Customers may also experience:** ● After towing a heavy load above the protection limit, the air suspension will only lower and will remain in low ride height. Instrument Panel Message (IPC) message \"\"selected ride height not permitted due to payload\"\" appears. This bulletin involves reprogramming the ASCM with the latest available software.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018474-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018474-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11018474","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":["U0300"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_jeep_wagoneer"]}],"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":[]}