Download Link: https://www.gtainside.com/en/gta4/mods/175771-mirror-fix/

This mod fixes the warped/distorted projection of mirrors on the PC version of GTA IV.
This issue usually occurred when the camera was brought close to the mirror.

(Mod description says officially supported patches are 1.0.4.0 and 1.0.8.0 but this mod also works for patch 1.0.7.0)