Congratulations! I'm about 3K behind you and my X5 has been great. No problems other than the standard, water pump, CV boots, etc. I've never heard of a different transmission or shift program for sport package, which I also have. I am looking forward to another 100K, I love this truck. Worst case, I'll shell out $4K for a rebuilt transmission and keep on going.

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2013 X5 3.5i M Sport
2004 M3 cabriolet SMG