# Service bulletins for the 2021 Xos SA01

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.

2 bulletins from NHTSA, as of 2026-10-19.

- [TSB 007\-24](/bulletins/11001887.md), 2024-06-19, Service bulletin: SERVICE BRAKES. In the event that the Xos stepvan produces a repeatable, loud growling noise during driving, coasting or braking from the driveline, please follow this instruction to replace the motor mounts and center the electronic parking brake \(“EPB”\) rotor.
- [TSB 004\-24](/bulletins/10251520.md), 2024-03-07, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT; ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER. In the event that any of the 2021\-2022 Xos Step Vans show signs of corrosion on the connections in the DC\-DC converter box, please refer to the following service instructions.

JSON: [/v1/vehicles/2021_xos_sa01/bulletins](/v1/vehicles/2021_xos_sa01/bulletins)

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