I am considering a used X3. I have a Z4 2,5i which I love, but need more room to carry my grandsons now that I have sold a camper van. Want AWD because we will be taking them snowboarding in the mountains. I live in Southern California so there are lots of 2 to 5 year old ones with high freeway miles (50 to 60 K) at reasonable prices, naturally rust is not a problem. I'm retired so the X3 will not be driven many miles yearly. I drive my Z4 about 3,000 annually and its my only car. Will be keeping the Z4! 1. Any recommendations on higher mileage X3s? Years to avoid? 2. I've heard compliants about automatic transmission? I have to have an automatic. Is this the same transmission as in my Z4, which I find no problem with, 3. Do X3 have run flats? 4. Not interested in a CPO, since I plan to buy from CarMax. I bought my Z4 from them - the car was completely flawless and the experience was by the far the best, and I have bought 50 cars in my life. 5, Any other suggestions?