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as I am sure you can understand, it is difficult to diagnose a noise that one cannot hear
there are many components in the suspension and steering system which can cause this, and many mounts and bushings commonly wear and can cause noises
in order to diagnose such a noise, the vehicle should be raised and the wheel removed so that the front end components can be inspected and tugged on to look for wear or play
if you have not had this carried out, this is your next step at this time
Sorry if you were hoping for a different answer, please don't shoot the messenger - I can only give the honest answer, which I have. Please remember that a low rating PUNISHES me for my honest and prompt response, and I receive nothing for my time and answer until a positive rating is clicked.
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.