2026 Buick Envista

While driving my brand new 2026 Buick Envista Avenir with only 347 miles on the odometer, the vehicle became difficult to control and multiple warning messages and service lights illuminated simultaneously: “Brake System Failure — Your driving speed is being restricted as braking may be difficult,” “Service Brake Assist — Your vehicle may not brake automatically or assist in braking when it detects a likely collision,” and “Steering Assist is Reduced — Drive with Care.” I pulled over immediately and contacted OnStar who advised the vehicle was unsafe to drive and arranged for a tow. The vehicle was towed to the selling dealer the same day, January 13, 2026, and remained in the dealer’s possession for 31 days for diagnosis and repair, until February 13, 2026. The dealer replaced multiple primary braking components: electronic brake control module (EBCM), brake master cylinder, power brake booster, and reservoir kit. These repairs involved both the vehicle’s electronic control systems and major hydraulic/mechanical brake components. The simultaneous multiple critical warnings, the loss of full brake response/control, the restriction of driving speed, and the reduction of steering assist show that core systems responsible for stopping and vehicle control were compromised. Replacing the EBCM along with major hydraulic components indicates a complex, systemic malfunction. This failure created immediate danger on the road, forced an extended out of service period for a new vehicle, and caused a month long significant disruption and expense. A primary safety system failing at such low mileage raises serious concerns about reliability and the risk of loss of braking performance, which could lead to a crash and endanger vehicle occupants and other road users. Consumers should be aware that a brand-new vehicle with only 347 miles stopped operating safely without cause, under normal driving conditions, and required replacement of major hydraulic/mechanical brake components.