There are 2 Disa Actuators on the 2006 e90 325i 1 on the inside & 1 on the outside of the manifold. My car is reporting Disa Actuator 1 Mechanical or Hardware Defect is this the inside 1 or outside 1 ? Cant find it anywhere on the internet. The car is running fine & it may be a carbon build up but may replace it at some stage or try to clean the existing Disa. Anyone know ?