I notice you have around 300,000 miles on your X. I was wondering if thats still on the original transmission and how do you feel about changing the lifetime transmission fluid? I too have an 2002 X5 3.0 with 104,000 miles on it. the only major problem i had was the cold weather oil separator problem(twice...second time happen with the upgraded kit). Do you think the major problems are isolated with the 4 plus liters Xs?