Rivian R1S 2025–2026 — technical service bulletin
Bulletin RCA-78-26-004-1 · NHTSA communication 11037101 · issued Aug 7, 2026
Technical service bulletin
communication type
Unknown / Other
component
2025–2026
model years
4
vehicle entries
Official summary
Rivian is initiating a customer satisfaction campaign for some model year 2025-2026 R1T and R1S vehicles that may be susceptible to windshield washer fluid leaking from the front fascia camera washer nozzle. The customer may notice washer fluid leaking and/or repeated low washer fluid warnings. Rivian will install a check valve in the hose that supplies the front fascia camera washer nozzle. Rivian is launching this campaign for customer satisfaction and to ensure the quality of Rivian vehicles.
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.