# Service campaign RCA\-26\-26\-001\-1

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.

- Type: Service campaign
- NHTSA id: 11030923
- Published by NHTSA: 2026\-04\-07
- Manufacturer's number: RCA\-26\-26\-001\-1
- Manufacturer's date: 2026\-03\-12
- Campaign id or software version: FSAM\-1735
- NHTSA component: ENGINE

## NHTSA's summary

Rivian is initiating a customer satisfaction campaign for some model year 2025 R1T and R1S vehicles that are susceptible to water contaminating the refrigerant system. Water contamination may cause premature failure of some refrigerant system components or, in some cases, cause a loss of HV isolation. A loss of HV isolation could cause the vehicle to enter a reduced performance safe state mode, and a "Limited Performance Mode" indicator light to illuminate on the driver display. Rivian will inspect the refrigerant system for water contamination and, if necessary, replace affected refrigerant system components. Rivian is launching this campaign for customer satisfaction and to ensure the quality of Rivian vehicles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030923-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030923-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2025 RIVIAN R1S
- 2025 RIVIAN R1T

JSON: [/v1/bulletins/11030923](/v1/bulletins/11030923)

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