545OH

Does anyone know exactly how the dynamic drive (ars) works as far as how it senses change and how it actually causes increase torque/stiffness in the sway bar? I was told that my fluid was at a low level which is why my Dynamic drive error message kept coming on and it seems fixed. What role does fluids have in the system.

cokeefe

It's an electrohydraulic system. The computer sends electrical signals to a hydraulic unit mounted on the swaybar. The hydraulic unit locks the two ends of the swaybar together to firm up the suspension, or disconnects the two ends to make the ride more compliant.

In the first picture, the big black thing with the yellow wire is the front swaybar's hydraulic actuator. You can see the hydraulic lines on opposite side.

The second picture shows the rear swaybar and actuator (the swaybar has a splash of yellow paint on it). These pictures are of my 550i.

On the sensor input side of things, I would think the computer uses steering angle and maybe a yaw sensor to decide on what to do with the swaybars (but I'm not sure about the sensors).

NoName545i

where do you add the fluid ?

RoadTrip

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