I am submitting this complaint after learning through a recent TechCrunch article regarding the NHTSA investigation PE26004 into Rivian rear suspension / rear toe link failures that my incident appears substantially similar to the failures currently under investigation. On March 2, 2024, at approximately 1:29 AM, my son [XXX] was driving my 2023 Rivian R1S (VIN [XXX] ) in [XXX] . While making a normal right turn from [XXX] onto [XXX] and accelerating normally afterward at approximately 30 mph, the vehicle suddenly suffered what appeared to be a catastrophic rear suspension failure. According to the driver, the left rear portion of the vehicle suddenly jolted downward, a loud mechanical breaking sound was heard, and the vehicle immediately became uncontrollable. The rear suspension appeared to collapse instantly. The vehicle then began sliding uncontrollably across the roadway and crossed into the opposite traffic lane. The driver attempted to release the accelerator and correct steering input, but the vehicle did not respond normally. Steering control was effectively lost and the vehicle could not be controlled. The vehicle ultimately impacted a tree on the left rear/driver-side rear area before coming to rest perpendicular to the roadway. Importantly, the loss of control occurred BEFORE impact with the tree. The impact was a consequence of the apparent suspension failure and resulting loss of vehicle control, not the initiating cause of the event. There was no rai