The contact owns a 2021 Chevrolet Express. The contact stated that while driving at an undisclosed speed, the vehicle started to pull to the left, prompting the contact to pull over to the shoulder off the roadway. After a visual inspection, the contact stated there was smoke coming from the driver’s side front brakes. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to determine the cause of the failure. The contact was informed that the braking system needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 18,000.