[Sasino97]

Somewhere, outside any other function:

pawn Код:

stock ExplodeVehicle(vehicleid)
{
    new Float:X,Float:Y,Float:Z;
    GetVehiclePos(vehicleid, X, Y, Z);
    CreateExplosion(X, Y, Z, 7, 5);
    SetVehicleHealth(vehicleid, 0);
}

And when you want to explode a vehicle, put "ExplodeVehicle(vehicleid)" in the event.

EDIT: I've now understood:

pawn Код:

public OnPlayerUpdate(playerid)
{
    if(PlayerToPoint(playerid, X, Y, Z) < RADIUS) // Or IsPlayerInRangeOfPoint(playerid, RADIUS, X, Y, Z)
    {
        ExplodeVehicle(GetPlayerVehicleID(playerid));
    }
    return 1;
}