2001 Audi Allroad Engine problems

I have replaced both catalytic converters on the 2001 audi allroad. The right one at 42k miles and the left one at 62k miles. The right catalytic converter has failed again at 115k. The dealer refuses to extend any warranty for the part. The dealer states that the original part is warranted for 80k miles, but the replacement part only for 12k miles or 12 months. There must be something wrong with the car or the equipment. Audi should warranty a required federal emissions part much longer than just 12 months. *Tr

Dt:the vehicle has developed a cam shaft gasket leak at only 60,000 miles. Also, one of the cv axles cracked. There where no problems with the vehicle prior to the dealership finding these problems. The dealership described to the contact that this problem with the cam shaft gasket could cause a major oil leak. If this were to occur the engine could seize because of loss of oil. The vehicle has not currently been repaired because of the cost.*Ak