Hi, active steering didn't work for like 3months, didn't try to fix it. After long drive, I got message, that engine is overheating, checked coolant, it was low, added coolant, engine temperature fell to normal operating range ~89-90C, and active steering started to work after long time. After few days I got active steering not working again, then I topped up coolant, it started to work again. It seems that I have coolant leak somewhere. The question is, why does it affect active steering? Does active steering uses coolant too and it causes it to shut down if temperature rises too much, or it mixes somehow with steering fluid, is it possible? Thanks!
Btw im driving e61 2006 N57 3l diesel.

 

1. Read the BMW DTC codes.
2. Resolve the overheating issue first.

 

This was due to coolant leak. When coolant reaches below low, i dont get error message for heating, it just disconnects active steering. Hope it helps to someone