[HELP] Is there a possibility to add a new object/car id to MTA ?

[Swagy]

I have always wondered if it's possible to add a new vehicle id or object id to my server ? 

[Tut]

There's currently no native way of adding new ID's. There are however tricks that you can perform to save on ID's. One is to only replace ID 1337 within a defined colshape, while it's still mapped with its original model all around the map outside of the colshape. Using this method can be beneficial if you're adding new landmasses to southern LS, by using ID's from northern LV etc.

You could also replace useless objects such as the collisionless Liberty City cutscene models (3923, 3917, 3911, 3907, 3906, 3905, 3903, 3902, 3900, 3899, 3898, 3897, 3895, 3894, 3893, 3892, 3890) 

You also have the option to replace casino objects:

There are about 70 of those chip models. If you leave just 1 out of those, then you can just shader them into every single color with a texture shader script, meaning you'd use only 2 ID's for something that currently occupies 70 ID's, by utilising shaders.