Both Rivian's R1S SUV and its R1T truck are now under the federal eye after the National Highway Traffic Safety Administration (NHTSA) opened a safety probe on May 26. The probe is focused on the vehicle's rear suspension, which the NHTSA's Office of Defects Investigation (ODI) says can separate and cause vehicles to swerve without warning. Its report states that the separation of the rear toe link is the cause. Federal reports show that rear toe link separation could have already caused one accident, when a Rivian vehicle swerved into another vehicle and a roadside barrier. Investigators received two Vehicle Owner Questionnaires reporting toe link separation in 2023 and 2024 Rivian EVs. Both were found to have broken bolts. Those held the toe link together until, well, they didn't. The ODI says it is examining items like onboard video, police reports, service history, and more to confirm whether the toe link is the issue. In January 2026, Rivian already recalled EVs for this issue .…