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Brake groan analysis and improvement is progressing based on experimental measurements. An advanced brake assembly FEA model was built which considers torsional stiffness of suspension for analyzing creep groan. Creep groan is a representative groan noise of brake system from stick-slip phenomenon standpoint. This year we will present our study for advantageous direction for reduction of creep groan which will focus on friction material µ vs. Velocity (µ-V) property, friction material physical properties and relative velocity between brake pads and rotor by advanced brake assembly FEA model.