I'm sorry, but don't get those bulbs. Bimmian overcharges for EVERYTHING.
If you go to HighPerformanceBulbs.com, you can get their 18-LED bulbs that will fit these cars for $50 (http://www.highperformancebulbs.com/bmwpy5frtusi.html). And you can get the 23-LED version for $60 (http://www.highperformancebulbs.com/bmwpy5frtusi1.html).
If you're willing to spend $70, get something that will blow both lower-end HPB products, and the overpriced Bimmian product out of the water. Get the 7.5 Watt LED bulb (in amber here http://www.highperformancebulbs.com/bmwpy5amulhi.html and in white here http://www.highperformancebulbs.com/bmwpy5ulhipo.html) and they will be SOOO much brighter than the cheaper bulbs. No one else sells those 7.5 Watt turn signal bulbs by the way.
HPB has a great reputation over on E90Post for having rock-solid HID kits that won't throw errors, and they have an almost perfect track record on the pick 06/07 models too. Everything I've bought from them (interior kit for my car + friend's cars, AE's, turn signals, etc.) has exceeded my expectations, and their customer service is incredibly helpful for an extremely small business.