Originally Posted by andrew

to retain the factory arm and wing... go to your local bmw dealer and purchase the universal wiper inserts (cut to fit sizing). this is the way they are sold for all bmws from '04 and older.

they work perfect... and are an exact fit to oem... total cost for two inserts... $5.00

bmw part number: 10A 61-61-0-154-440 (wiper refill).