[Mikro]

You should probably log the parameters from the function and the vehicle model. Something like:

Code:

public OnVehicleMod(playerid, vehicleid, componentid)
{
   printf("Player: %i, Vehicle: %i, Model: %i, Component: %i", playerid, vehicleid, GetVehicleModel(vehicleid), componentid);
   return 1;
}

And than see if some wrong components are added to a model which does not support it.