Front Suspension Strut problems of the 2003 Nissan Altima

Right front strut on my 2003 Nissan Altima has failed 4 times in 18 months. Mileage is high on my Altima, at 40k due to several trips from California to oregon for family emergencies in first year of ownership. I am being told by the dealership that I am getting defective mcpherson struts that are now made in mexico. Car has a very distinguished pull to the right every since first failure at 6 months in service. Alignments and new tires have not helped this situation. Car is currently sitting at the dealer, I will not let them replace the strut again because they cannot assure me that I will not get another defective part. Car is very hard to handle especially going over uneasy roads, which there are plenty of in southern California.