[j8smith]

Originally Posted by BMWeber

that's the electric steering that is why the reservoir looks different.

http://www.bmw.com/com/en/insights/t...le=servotronic

Looking at the diagrams for the E90 and E87(www.realoem.com/bmw) it looks like the different reservoir indicates Active steering, not electric steering. The standard hydraulic has a star shaped cap on the reservoir, While the active steering has a flat round cap.

Also, servotronic only refers to variable assist, not to weather the steering is electric/hydraulic/mechanical