  In this work, we propose two possibilities of CPT-odd and Lorentz-violating
(LV) nonminimal couplings in the Electroweak sector. These terms are
gauge-invariant and couple a fixed 4-vector to the physical fields of the
theory. After determining the LV contributions to the electroweak currents, we
reassess the evaluation of the decay rate for the vector mediators $W$ and $Z$.
Using the experimental uncertainty in these decay rates, upper bounds of $1$
part in $10^{-15}$ (eV )$^{-1}$ and $10^{-14}$ (eV )$^{-1}$ are imposed on the
magnitude of the proposed nonmimal interactions.
