  In this paper, we study a relativistic quantum dynamics of spin-$0$ scalar
particle interacts with scalar potential in the presence of a uniform magnetic
field and quantum flux in the background of Kaluza-Klein theory (KKT). We solve
Klein-Gordon equation in the considered framework and analyze the relativistic
analogue of the Aharonov-Bohm effect for bound states. We show that the energy
levels depend on the global parameters characterizing the space-time, the
scalar potential and the magnetic field which break their degeneracy.
