SetVehicleTireState(vehicleid, tireid, bool:tirestate)  
{
  new panels, doors, lights, tires;
  GetVehicleDamageStatus(vehicleid, panels, doors, lights, tires);
  new tireadd;
  switch(tireid)
  {
   case 1: { tireadd = 8; }/левое верхнее
   case 2: { tireadd = 2; }//правое верхнее
   case 3: { tireadd = 4; }//левое нижнее
   case 4: { tireadd = 1; }//правое нижнее  
   default: { return -1; }
  }
  UpdateVehicleDamageStatus(vehicleid, panels, doors, lights, (tirestate)?(tires|tireid):(tires&tireid));
}

Или еще лучше
#define TIRE_LEFT_NORTH 8
#define TIRE_LEFT_SOUTH 4
#define TIRE_RIGHT_NORTH 2
#define TIRE_RIGHT_SOUTH 1
SetVehicleTireState(vehicleid, TIRE_LEFT_NORTH, true);

SetVehicleTireState(vehicleid, tireid, bool:tirestate)  
{
  new panels, doors, lights, tires;
  GetVehicleDamageStatus(vehicleid, panels, doors, lights, tires);
  UpdateVehicleDamageStatus(vehicleid, panels, doors, lights, (tirestate)?(tires|tireid):(tires&tireid));
}