[henry jiggy]

When the car spawns, assign its id to a global variable, example.

pawn Код:

//OUTSIDE of any function

new PlayerVehicle[MAX_PLAYERS];


//On the vehicle spawn
DestroyVehicle(PlayerVehicle[playerid]);
PlayerVehicle[playerid] = CreateVehicle(411,x,y,z+4,a,-1,-1,30000)
PutPlayerInVehicle(playerid,PlayerVehicle[playerid],0);
spawnedcar[playerid] = 1;

//OnPlayerDisconnect

DestroyVehicle(PlayerVehicle[playerid]);
PlayerVehicle[playerid] = 9999999999999999999999999999;

Just put that propperly on your script with the proper car modelids and you're good to go!