stock GetCoordBonnetVehicle(vehicleid, &Float:x, &Float:y, &Float:z)
{
    new Float:angle,Float:distance;
    GetVehicleModelInfo(GetVehicleModel(vehicleid), 1, x, distance, z);
    distance = distance/2 + 0.1;
    GetVehiclePos(vehicleid, x, y, z);
    GetVehicleZAngle(vehicleid, angle);
    x -= (distance * floatsin(-angle+180, degrees));
    y -= (distance * floatcos(-angle+180, degrees));
    return 1;
}

stock GetCoordBootVehicle(vehicleid, &Float:x, &Float:y, &Float:z)
{
    new Float:angle,Float:distance;
    GetVehicleModelInfo(GetVehicleModel(vehicleid), 1, x, distance, z);
    distance = distance/2 + 0.1;
    GetVehiclePos(vehicleid, x, y, z);
    GetVehicleZAngle(vehicleid, angle);
    x += (distance * floatsin(-angle+180, degrees));
    y += (distance * floatcos(-angle+180, degrees));
    return 1;
}

new Float:POS[3];
for(new i=0; i<MAX_VEHICLES; i++)
{
    GetCoordBootVehicle(i, POS[0], POS[1], POS[2]);
    if(IsPlayerInRangeOfPoint(playerid, 1.0, POS[0], POS[1], POS[2]))
    {
        // тут ваш код
    }
}