Tesla Model S 2021–2026 — technical service bulletin
Bulletin SB-26-18-001 · NHTSA communication 11029582 · issued Feb 4, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2021–2026
model years
12
vehicle entries
Official summary
On some Model S and Model X vehicles, the compression gap of the HVAC drain funnel seal is wider than intended, which may cause water ingress. Inspect the sponge area of the HVAC drain funnel for water ingress. If water ingress is present, rework the HVAC drain funnel seal.
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.