T2* mapping does not fully represent renal tissue oxygenation. Diffusion-weighted imaging (DWI) can provide information about confounding factors, which can be used to correct T2*. The most widely used DWI technique SE-EPI is sensitive to magnetic field inhomogeneities and hence prone to geometric distortions. In this work we propose a diffusion-weighted Rapid Acquisition Refocusing Enhancement (RARE) variant for DWI of the rat kidney free of geometric distortions. Phantom experiments validated the diffusion weighting implementation in the common RARE sequence. Ex-vivo and in-vivo experiments using diffusion-weighted RARE showed no geometric distortions at 9.4 Tesla.