2019 Buick Encore

The full type of this tire is Continental ContiProContact P215/55 R18 94H Also DOT is IP5 OF8PAO 5323. Note there are two letter "O". Either one or both of those could be the number 0. I cannot tell the difference on my tire. When I was driving in a parking lot I heard a loud noise and did not know what it was. I did not think to look at my instrumental panel so I drove around a half mile home. Then I noticed the TPMs warning and saw that the tire was completely flat. I saw sidewall damage that look like something cut into my side wall or perhaps that was the blowout. It was cut about a half inch or inch long in the outside sidewall of the tire. The tire only had about 821 miles on it. I check the pressure consistently and it always was the proper pressure as specified by the vehicle door jamb. Also my vehicle shows me the exact tire pressure when on the instrument panel. I checked it the morning before the blowout happened and the tire pressures were fine. Also I look at my tire pressure almost every time I drive (about every day) using the tire pressure indication on my instrument panel. I never hit any potholes or any curbs. The tire looked normal and felt fine when I was driving on it (until the blowout of course). Also according to the DOT it was manufactured late 2023 so it does not sound like dry rot. This seems like it could either be a manufacturing defect or installation defect of some sort. A blowout obviously is a safety risk since this could have happened on a busy highway. Luckily I got home safely. When I brought it in to the dealer for repair they thought maybe something hit the tire from the outside. I believe the dealer got rid of the tire so it would not be available for inspection. No warning before the failure occurred.

Tire pressure warning came on on highway and FL tire went flat in seconds, pulled over to the shoulder. Tire had ruptured sidewall and apparent dry-rot. Tire shop checked all other 4 tires and all show clear signs of dry rot (cracked rubber) on side wall. ContiProContact P215/55 R18, failed tire DOT LMOA BN7 0718. Other tires 1x same DOT and 2x : LMOA BN7 0618. Tires are OEM, original with vehicle purchase. Vehicle mileage 44220. Replaced all 4 tires already but have pictures of all original.