Rivian has expanded a safety recall to cover an additional 3,829 model year 2025 and 2026 R1S and R1T electric vehicles after a parts supplier failed to keep defective front turn-signal lamps from reaching factory production lines. The National Highway Traffic Safety Administration logged the action as campaign 26V-508, and Rivian’s recall page shows the remedy as available since August 11, 2026. The recall can also be searched through NHTSA’s recall lookup tool.
What the defect is and why it matters
Rivian determined that certain 2025 and 2026 R1S and R1T vehicles fail to conform to Federal Motor Vehicle Safety Standard 108, because one or both front turn-signal lamps may not illuminate and flash.
Diminished front turn-signal lamp performance may cause reduced awareness of the vehicle’s intent to turn for road users in front of the vehicle.
The lamps, supplied by Myotek, went into R1S models built between June 12, 2024, and May 26, 2026, and into R1T models produced from October 1, 2024, through March 19, 2026. One or both front turn signals may fail to illuminate or flash as intended due to an improperly manufactured lamp assembly.
Rivian says it is not aware of any accidents or injuries tied to the condition. Between June 2025 and July 2026, Rivian became aware of 17 instances of turn-signal failure across the United States.
How the supplier failure spread to additional vehicles
The original recall, campaign 25V-387, covered 27,882 vehicles back in June 2025. According to recall 26V-508, the supplier failed to properly quarantine suspect parts, resulting in their installation in additional vehicles.
After issuing the initial recall, Rivian continued monitoring field performance through July 2026, identifying 17 additional cases of turn-signal failures that appeared identical to the defect addressed by the June 2025 recall. The company later decided to add 3,829 vehicles after determining that the supplier had failed to contain the suspect parts.
All told, 3,204 R1S models from the 2025, 2026 model years are affected, along with 625 examples of the R1T, also covering 2025 and 2026.
Rivian estimates that 0.6 percent of the suspect vehicles actually contain the defect.
How owners will know and what happens next
A message on the driver display will alert owners if one or more front turn-signal lamps fail to illuminate, reading “Turn signal lights not working. Service it soon.” Any turn signals that continue to function will start blinking at double speed, as will the turn-signal sounds. Owners who notice rapid double-speed clicking and a corresponding dashboard alert should contact a Rivian service center promptly.
Rivian service technicians will inspect the front turn-signal assemblies on affected vehicles and replace defective lamps free of charge. Notification letters go out on or before September 29, and the affected VINs become searchable in NHTSA’s database on August 31.
Broader context for Rivian
The turn-signal action is the latest in a series of quality and supplier challenges for the California-based automaker, which has been simultaneously investing in production capacity. Rivian’s Normal plant added 1.1 million square feet of factory space for the upcoming R2 midsize crossover.
Rivian recalled nearly 20,000 R1T and R1S vehicles in January 2026 over service procedures that may have left rear toe links improperly reassembled. NHTSA subsequently opened an investigation on May 26, 2026, following two R1S crashes caused by alleged rear suspension failure and subsequent loss of control, covering 114,922 Rivian R1S and R1T models.
The turn-signal recall expansion compounds that supplier-management scrutiny heading into the R2’s production ramp.
Owners can verify whether their VIN falls within the affected population through NHTSA’s recall lookup tool or Rivian’s recall page. While the supplier was responsible for the improperly contained parts, Rivian ultimately remains accountable for the vehicles it sells. The automaker has not announced any changes to its supplier agreements as a result of the expanded campaign.
