Toyota Supra 2020–2023 — service campaign
Bulletin 24TD04 · NHTSA communication 11007450 · issued Jul 17, 2024
Service campaign
communication type
Electrical System
component
2020–2023
model years
4
vehicle entries
Official summary
Due to incorrect software in the Data Communication Module (DCM) in your vehicle, the DCM cannot connect to the 4G cellular service. Therefore, after the 3G cellular service was sunset, voice communication with service providers when using connected services like Emergency call and Roadside assistance, is not available.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.