[CMHX5]

I have a F15 X5D bought with CPO warranty. Prior to the CPO, the selling dealer had replaced the EGR Cooler and other parts. Since then I have had 3 CELs related to some EGR issue or another and the vehicle has been in the shop over 15 days. Once some sensor was replaced and second time the EGR cooler was replaced. Now, the CEL is on again with the vehicle in the shop with another EGR issue. May need one more EGR cooler. What a nightmare in less than a year of ownership! Do you all have any suggested course of action to take with the SA? I have to say that the dealership I am working with is courteous and helpful. Also, will the EGR components be covered by the CPO warranty? I have the original warranty for about another year yet, and 2 years of CPO after that.