Four apparently different bosonizations of the U(q)(su(2)k) quantum cu
rrent algebra for arbitrary level k have recently been proposed in the
literature. However, the relations among them have so far remained un
clear except in one case. Assuming a special standard form for the U(q
)(su(2)k) quantum currents, we derive a set of general consistency equ
ations that must be satisfied. As particular solutions of this set of
equations, we recover two of the four bosonizations and we derive a ne
w and simpler one. Moreover, we show that the latter three, and the re
maining two bosonizations which cannot be derived directly from this s
et of equations since by construction they do not have the standard fo
rm, are all related to each other through some redefinitions of their
Heisenberg boson oscillators.