Hi guys, I have a BMW 545i 2004 M sport and the car has 50000km on the odometer. The car gives the ACTIVE STEERING FAULT after driving for some time and mostly on a rough road. If you turn off the car and restart it the fault goes away and the same process happens again. I got it checked from the dealership here in Pakistan today and 2 faults came up regarding the active steering( Picture attached regarding the Servomotor). The mechanic said that you have a faulty thermostat and the car might be running a little too hot(40c plus nowadays)and the active steering motor is overheating due to that. I accessed the hidden computer for the coolant temp on the way back and it shoes 80-90c which means the thermostat is stuck in the open position and doesn't make sense for the Active steering fault.
When I bought the car I got alignment done from a local shop and the steering is at a slight angle when the car is going straight. Could a bad alignment be a reason for the AS fault? and does the alignment need to be done by attaching a computer for it to work properly?


I would appreciate your insight on this. Thank-you in advance.

 

You have quite a few things wrong. Just change the thermostat and see what changes.

 

Can that be related to Active Steering?

 

Straight from BMW shop manual.....

 

Does that mean the active steering fault can come due to improper alignment?

 

No, just would straighten your steering wheel if done properly.