There you go, a link to a file that you can download that replaces all the mods to the original ones so that you can start over!
This is where you put the file-> X/
rogram Files (86)/Rockstar Games/Grand Theft Auto IV/pc/models/cdimages
or if you, like me, have the game on Steam
, follow these instead:
rogram Files (x86)\Steam\steamapps\common\grand theft auto iv\GTAIV\pc\models\cdimages
Just copy and replace
the file and if done correctly, all the cars should go back to normal!