We have performed an intra-individual, inter-vendor comparison of renal T1 and BOLD T2* measures using predominantly product sequences. Renal T2* is sensitive to dephasing due to background magnetic field gradients, the degree of which differs across the MR vendors. A strong B0 L-R gradient, especially prominent for one vendor, leads to an asymmetry in T2* values between kidneys. B1 maps vary across subjects with no vendor-specific bias. Renal cortex T1 values computed using a 2-parameter fit were shown to systematically vary across vendors; a 3-parameter fit reduced this bias but differences remain. This highlights areas of future development for standardisation.