A fluid leak may develop from one or more power steering hose. When a leak is being repaired, it is not uncommon for multiple hoses to be replaced.
BMW 318i Problem Reports
Most Reported BMW 318i Problem Reports
If you can spin your key freely in the ignition you need to get the barrel replaced asap, if you wait cuz it still works (is what I did) you will end up unable to turn it to start or shut off the car. The worst part is once this happens if you cannot turn the ign. the entire steering column must be replaced, if you can still turn the key it is a simple fix so do it!!