When replacing on your E36 the door sill trim panel clamps which hold the door sill trim panel/outer kick panel, there are different clamps for the different outer kick panels, the clamp thickness is different, do NOT mix and buy the correct ones for your trim panel version.

for
LEFT OUTER KICK PANEL 51718190707 and RIGHT DOOR SILL TRIM PANEL 51718190708 only use Clamp NATUR 51718184574 https://www.realoem.com/bmw/enUS/sho...96#51718184574

for
LEFT OUTER KICK PANEL M TECHNIC 51712234187 and RIGHT DOOR SILL TRIM PANEL M TECHNIC 51712234188 only use Clamp M TECHNIC 51712234032 https://www.realoem.com/bmw/enUS/sho...diagId=51_2761