One problem related to tire bubble has been reported for the 2014 BMW 328. The most recently reported issues are listed below.
I have had 5 blowouts and 1 tire has a bubble(about to blow out) in 13 months. I have 2 sets of wheels. The bridgestone driveguard tires have had all of the problems. Not one problem with my michelins. I drive on the same roads with both sets. The sidewalls are extremely weak on the bridgestone. In 26 years of driving, these are the only tires that I have gotten a blowout with, and 5 in one year.