{"nhtsa_id":11031223,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-04-10","date":"2026-04-02","document_id":"08-142-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"R1H Radio USB Update to U40.20 Customers may experience one or more of the following: SYMPTOM: ● Incorrect phone listed on passenger display. ● Navigation widget black/stuck at loading. ● Apple carplay icon not present during carplay session. ● Diesel exhaust brake indicator is yellow/on when starting the vehicle even though the exhaust brake was set to OFF when vehicle ignition was turned off. ● Brake soft button in on position. ● Press and hold button stuck. ● Articulation graphic not updated. ● Icon overlap in status bar. ● Pressure in trailer tires set at zero psi. ● Compass intermittently shows \"--\" in cluster. ● Navigation stuck at same location. This bulletin involves inspecting and if required, updating the radio software level to U40.20.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031223-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031223-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031223","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"RAM","model":"2500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_2500","2026_ram_2500"]},{"make":"RAM","model":"3500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_3500","2026_ram_3500"]},{"make":"RAM","model":"4500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_4500","2026_ram_4500"]},{"make":"RAM","model":"5500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_5500","2026_ram_5500"]}],"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":[]}