I purchased new pirelli pzero tires from my local bmw dealer. the rear tires exhibited intermittent air loss and were replaced by the dealer because the dealer believed they were damaged during installation. the second set of rear tires also exhibited intermittent air loss. the dealer believed the wheels were damaged and causing the air loss. i had a wheel specialist inspect the wheels, and they found no defects to cause air loss. the wheel specialist found the tires to be defective as they have excess material at the bead that prevents proper sealing on the rim. the wheel specialist attempted to remove the excess material from one tire to determine if that would improve the problem, which it did to some extent. i called pirelli and notified them of the problem, and they stated they would replace one rear tire under warranty but not the tire that was worked upon by the wheel specialist. in summary, i experienced two sets of defective pirelli p zero tires leading me to believe there could be a problem with additional tires. i have video evidence of the leaks seen during a leak test.
Monday morning pulled the car off the garage and noticed the front passenger tire light was on. thought it was a nail in the tire and stopped at ntb to fix it. after taking the wheel off the car, the mechanic called me and indicated that the rim was cracked and they cannot do anything. my car is under warranty so called bmw and brought the car to the dealership. they took the tire off the rim and made pictures, however they kept a neutral tone saying that bmw does not cover wheels and tires under warranty, mostly because i probably hit a pothole. the wheel has no curb damage and the car is driven 50 miles/day highway. i did not damage this wheel and it appears to be a manufacturing defect, one of many people complain already on the net. when is bmw going to take responsibility for their product, specially when thinking that a wheel might rupture on the road, at 50-60mph? *tr