jackz1 
2011 BMW 5 Series Sedan 550i xDrive 4dr Sedan AWD (4.4L 8cyl Turbo 8A)
Poor Tires equipped for the 5 series
 I'm a BMW fan and had several BMW cars bought or leased from BMW dealers before this 550I leased in Sept 2011 from Nick Alexander Imports in LA. No problem with BMW cars before this 550I which we had replaced 3 run flat tires within 7 months of lease with the same problem-internal cuts on tires. This is really unusual as I never had this tire issue with other BMW cars before. I filed a complaint with the dealer from which I leased the car but was told driver was responsible for tires.