Originally Posted by nboksa
They changed all 4 tires out to Bridgestone Potenza RFT's and the problem is completely gone.
It sounds like you just got one or more bad OEM Continental tires which were properly replaced under waranty.
While most folks seem to prefer the Conti ProContact SSR tires to the Bridgestone EL 42, the EL 42s on my '07 E91 have been fine for 15,000 miles. The only issue I've noticed is that the wet traction could be a bit better.
Also, it's not a question of whether Continental and Bridgestone are "acceptable" brands - they are premium brands but they both make many different types and models of tires. The question is better framed "Is this tire good for my car and my driving needs?"