2023 Cadillac CT5

While driving my 2023 Cadillac CT5-V Blackwing in an active traffic lane, the vehicle experienced a sudden and complete loss of propulsion. I was unable to maintain movement with traffic, and the vehicle became disabled in the roadway. The failure occurred without sufficient warning for me to safely remove the vehicle from active traffic. This created a serious safety hazard because the sudden loss of propulsion exposed me and other motorists to the risk of a rear-end or other collision. This incident is particularly concerning because the vehicle has experienced multiple catastrophic engine failures. The vehicle has experienced four engine failures and is currently at an authorized Cadillac dealership undergoing installation of a fifth engine. The vehicle previously spent approximately 157 days at an authorized Cadillac dealership during an extended repair period. Despite extensive repairs and engine replacement, the vehicle subsequently experienced additional engine failure. As of September 3, 2026, the vehicle remains at Suburban Cadillac of Plymouth and has not been returned to me. The current repair involves installation of another replacement engine. My concern is that repeated engine replacements have not corrected the underlying reliability and safety problem. A vehicle that can suddenly lose propulsion while being driven in active traffic presents a serious risk to the driver, passengers, and surrounding motorists. I am submitting this complaint so NHTSA has a record of the loss-of-propulsion incident, the repeated engine failures, and the multiple engine replacements involving this 2023 Cadillac CT5-V Blackwing.