Recently got a GS4 and seller told about the noise and it has become a bug. Noise seem to come with the car is in the process of braking. However, the noise doesnt come all of the time. Not a very good description but it is little hard to diagnose. If you have this problem I sure you can relate.

 

Go in your car and put the key in the "on" position without turning the car on. Pump the brakes three times. Do you hear the noise?

If so, it's normal.

 

No I dont hear any noise with pumping the brake without engine on or driving.

 

Oh. I thought that maybe it was a pump you were hearing.

A video might help.

 

i have ther same problem comes and goes i hear it coming from rear driver side only when i let go of gas ready to brake drives me crazy its like a squeaking sound like something is rubing and only happens when weather is wet and humid