Problems with my f31 active cruise control and lane departure warning.

[crytechs]

I'm new to this forum so not entirely sure if this is the correct place to post but ill give it a shot! Any help is appreciated!

After letting my grandparents borrow my car for a few hours, it was returned with some gravel on the front lip. It looked as if they've hit a small mound of gravel. I couldnt see any exterior damage besides a small scratch under the car only visable when looking under it. I then stared it up only to be see a bunch og error messages go off one after the other about the lande departure warning failure, then the collision warning failure, and lastly the active cruise controll failure. The odd part about the whole thing is that all the systems work perfectly normal. Sometime they reset and the error message disappears and then suddenly appears again. Does anybody know what the problem could be? Or a possible fix? Thanks in advance!

[328 Power 04]

Do you have a readout of the codes present from diagnostics?

[lubeto13]

Look at your radar sensor.
Maybe it needs to be calibrated or maybe the license plate covers it.

[crytechs]

No error code, the fault message shows on the iDrive screen.

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Thanks for your reply, ill check it out!

[ptarditi]

Check to see if all your PDC sensors are absolutely completely installed. Any component that is part of driver assistance can down that system. Also as lubeto13 says look at the radar components.