what does a squeaking sound from the brake pedal when you step on it meant ?

What is your question?

The squeaking sound comes out everytime you apply the break pedal. The car mentioned here is a Year 2013 BMW 528I m Sport model. Appreciate some highlights on my problem. Thanks.

What makes this problem better or worse?

Stepping harder on the brake pedal

How long has your 2013 BMW 528i had this problem?

a few weeks