  The effects of loop contributions to the electroweak precision observables
and m_h in the MSSM with non-minimal flavour violation (NMFV) are analyzed,
including the mixing between third and second generation squarks. The
mixing-induced shift in M_W can amount to 140 MeV and to 70x10^{-5} in sin^2
\theta_{eff} for extreme values of squarks mixing, allowing to set limits on
the NMFV parameters. The corrections for m_h are usually small and can amount
up to O(5 GeV) for large flavour violation.
