I purchased a 2013 jaguar xj new on october 22, 2013 that was equipped with 4 pirelli pzero nero tires. on february 22, 2016 i had to replace the two front tires 245/45r/19 due to wear and tear. the rear tires were deemed in good condition. but, a month later, on march 27, 2016 i was driving on a clear freeway when my pirelli pzero nero a/s rear tire had a blowout where the entire tire separated at a seam so that one part remained on the rim and the remaining portion of the tire moved off the rim. i was traveling at 65 mph on open freeway with no debris or objects on road. the exploding tire caused the car to veer 40 to the left, then back suddenly to the right. i was able to control car to immediate stop but can see no puncture on tire. it appears that the tire was defective and tore apart even though trend was still deep.