Engine Head Gasket Leaking problems of the 2014 Audi A4

4 year old car 3 months past 4 year extended warranty and major oil leak, which if not repaired can negatively impact engine. Both valve cover gaskets and timing chain cover gaskets are leaking. When asked service consultant at Audi how often this happens, he said in 15-20% of cars by 50,000 miles (I have 46,000 +). This is a manufacturing flaw and should be made part of a recall. I am paying over $2000. 00 for this repair after a 10% discount with a dealership "coupon". This is clearly a manufacturing defect of these parts and it is inexcusable that Audi pass this defect and the costs on to 15-20% of customers after approximately 4 years of ownership and comprehensive maintenance . The service person told me there was nothing I could do to have prevented this from occurring . I think the ntsb can alert Audi to the . Fact this is a defect in the cars they are selling, causing unnecessary costs and burdens and possible engine hazards to consumers.