ABS Buzzing Sound

[Jasun]

I am new here, not sure if this topic has been fully explored. I have an issue with my ABS. Whenever I apply the brake and there is a buzzing sound coming out of somewhere near the ABS booster. It only happens when the car comes to a full stop or a near full stop. If I disable the oil pressure sensor on the ABS booster assembly, then there is no ABS and no buzzing sound. I tried everything from changing the booster and replace the pressure sensor and  ABS relay and no success. Hopefully somebody else have the same issue and can share some tips. Thanks in advance.