Did you know your Volkswagen or Audi brake system needs to be flushed every 2 years? The reason for this is brake fluid is hygroscopic, this means it absorbs moisture. Moisture causes corrosion and corrosion leads to part failures. Your braking system is probably the 2nd most important system on your car next to steering. Plus the rather small cost of a VW brake flush or a Audi brake flush is money well spent to reduce the costs or eliminate future repairs.