2015 528i. I have 4 contiprocontact ssr's on my car. They have been causing so much headache. At 5 thousand miles I got a flat tire, and a leaking one which costed me close to a grand to replace. 5 thousand miles later I have another leaking tire, one of the newly replaced ones. I get low tire warning with 29 psi pressure. It is not a flat. Yet, tire shop says that it is leaking from thread. I have never replaced so many tires and spent so much money on tires in my life. Are these conti's faulty? I believe I'll bite the bullet and replace all stupid conti's with driverguard or so. I am fed up with conti's. BTW, my tires are 18''.