Purchased new 2011 Golf TDI 4/30/11 and was excited to bring it home. Unfortunately, The engine had moderate corrosion on all aluminum parts. Unclear as to how this occurred. May have been exposed to sea water during shipment from Germany. Big disappoinment.
It's common for the aluminum surfaces be pitted if parts of the car sat underwater when flooding occurs. Car dealers just clean them up and sell it. There are 8,000 vehicles deemed "flooded" per Insurance institute in the state of New Jersey per year.