My Lexus IS300 makes a funny noise @ a stop?

Passerby

Rookie
It makes this, "Wiii~wiii~wiii~" sound when i come to a full stop @ a light. Not too loud, but if i have the music on low, i notice it. If i put it in neutral, the sound mostly goes away. Any idea what this might be? I just bought this used and don't have previous owner's maintenance records. I'll get it checked out, but i just want an idea if this is a simple fix where i can correct the problem w/o taking to a mechanic to bs me.
 
Top