This is the latest revision dipstick available for most of the TFSi platform. Most TFSi platform cars will have the orange-topped dipstick from factory, and it is now becoming increasingly common due to age, for the plastic to become brittle and break down. This in turn, can cause the plastic and o-ring to fall down into the sump and has the potential to block up the pick-up-pipe depending on the severity. When the o-ring drops and breaks it's seal, this will of course cause a loss of vacuum as well.
Genuine part number: 06F115611F