2025 RIVIAN R1S Engine Problems

In late May 2025, I took delivery of a new leased 2025 Rivian R1S equipped with the MaxPack battery. Since delivery, the vehicle has had intermittent electrical issues with the USB-C ports that I reported on June 12th (approx 3 weeks from taking delivery), but on July 28, 2025, it experienced a sudden and complete electrical system failure while parked. Both the high-voltage and low-voltage systems shut down, leaving the vehicle entirely inoperable. Rivian Service has reported that the incident was caused by an isolation fault, which triggered the pyrotechnic safety fuses to blow, fully disconnecting the high-voltage battery. The vehicle required towing on dollies to a Rivian Service Center, where it remains out of service pending repairs. This failure occurred within just a few months of delivery, and I have been informed by the tow operator that similar failures have occurred with other 2025 Rivian MaxPack vehicles. This defect...

On November 16, 2024, while trying to use the vehicle's heating system, only cold air would come out of the vents and an error message, “thermal system fault” appeared on the screen. The service center instructed to not drive it and eventually picked it up via tow truck and made repairs. The vehicle was returned and hot air successfully comes out of the vents but it is often accompanied by extremely loud noises (like a jet engine) as well as some pulsating and odd noises. Also, periodically only cold air comes out of all vents (even though the screen shows heat) if the defog is selected with temperature and fan speed regulated. The safety and performance of the battery has been impacted by the faulty thermal management system.

On January 9, I was driving my new 2025 Rivian R1S (approx. 2,400 miles) when it suddenly displayed “Drive stalk not working.” The vehicle jolted, made a loud noise from the front axle, and then fully stopped in the middle of a busy road with the battery still at 55%. Once it stopped, I had no hazard lights or power steering, and the infotainment system locked up. After several attempts to reboot, the screen showed “Critical battery error” before shutting down completely. I was unable to move the vehicle or alert other drivers with flashing lights, creating a major safety hazard. It took about two hours for a tow truck to arrive. ## Component or System Failure: The vehicle’s propulsion system (drive controls) and electrical/hazard light systems appeared to fail simultaneously. The vehicle is currently at a service center for inspection and could be made available if needed. ## Safety...