2016 Buick Regal

The contact owns a 2016 Buick Regal. The contact stated while driving 35-40 MPH, the check engine warning light illuminated, and the vehicle started sputtering. The contact veered to the side of the road and turned off the vehicle for 5-10 minutes. The contact stated that upon restarting the vehicle, the failure was no longer present. The contact drove to the residence. The contact stated that the failure recurred while driving. The vehicle was taken to the dealer, where it was diagnosed that the cylinder #1 coil pack and spark plug needed to be replaced. The vehicle was taken to an independent mechanic, where all the coil packs and sparks plugs were replaced; however, the failure recurred several days later. The vehicle was taken back to the independent mechanic, where it was determined that the failure was related to TSB Number: 16-NA-383 (Engine and Engine Cooling). The dealer was contacted and informed the contact that the TSB was VIN specific, and the vehicle was not covered. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 85,900.