Motor sound from front wheels after moving a little with car

[sim785]

Hello,

I have a 2002 Vitz.

The other day after switching off the car and was unpacking stuff I heard like a motor sound (the sound was like the motor of liquidizer) continuously running. I had never heard this before. At first I thought it was the cooling fun in front of the radiator but I knew this never turned on when car was switched off. I opened the front bonnet but could not locate the noise although it sounded like from the front-right when facing the car. The noise stopped after a minute or two.

Now when I switch the car on, after I move maybe a meter or two, I hear this sound (like the motor of liquidizer) for a couple of seconds and then stops. I am not sure but I think I heard the noise under breaking one time only.


Everything works fine; breaks, acceleration, gears. From a driving point of view I cannot feel any difference. I am going to take the car for repairs however I just wanted to know if anyone knows what the sound might be so I that I know what the mechanic is speaking about.