I don’t know if they aren’t working at all or they just won’t spawn in-game. I got this to work before, I don’t know the problem this time. All of the folders for the cars are separate, all of the names in the cfg are correct.
I am also using ESX and some other mods. That didn’t seem to interfere with anything before though.
If it’s a dlc.rpf file, you can easily use OpenIV or CodeWalker’s RPF Explorer to extract all the necessary files, those being all .yft and .ytd files as well as the following .meta : carcols, carvariations, vehiclelayouts, handling, vehicles . Some of these may not be present depending on the vehicle model, but for the very least you will need the vehicles.meta . If there are other .meta files they are usually not used (such as dlctext.meta or the *contentunlocks.meta ) as these either don’t work in FiveM altogether due to lack of data_file mounters or take little to no effect when mounted.
I use OpenlV to open the dlc.rpf and take all of the meta files and the yft ytd files. I have also added some screenshots of what the folders look like in the original post.