Tesla Cybertruck 2024–2025 — technical service bulletin
Bulletin SB-25-16-006 · NHTSA communication 11026874 · issued Dec 8, 2025
Technical service bulletin
communication type
Electrical System
component
2024–2025
model years
2
vehicle entries
Official summary
On certain Cybertruck vehicles, the AC junction box to fast charge contactor HV harness might have a poor crimp connection, which may cause increased resistance and localized heating in the harness. If the ancillary cover is removed for other procedures, replace the AC junction box to fast charge contactor HV harness with version -J or later.
Vehicles covered
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.