Tesla Model S 2021–2022 — technical service bulletin
Bulletin SB-25-16-004 · NHTSA communication 11023641 · issued Sep 3, 2025
Technical service bulletin
communication type
Electrical System
component
2021–2022
model years
4
vehicle entries
Official summary
On certain Model S and Model X vehicles, the HV battery umbrella valves, over time, may become damaged due to road debris. Replace all 5 umbrella valves with updated parts. This new revision, R1, updates the affected Countries/Regions.
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.