Now BMW Guy 
2007 BMW X3 SUV 3.0si 4dr SUV AWD (3.0L 6cyl 6M)
Love my x3
 Purchased used w/ BMW's Certified warranty wasn't even looking at this model but it came up in the dollar amount I was searching for. I'm really glad I purchased this vehicle for the price it a lot of car. I have not had any problems with transmission it works just fine. I believe it not the trans. but the drivers it's electronic and you can confuse it by your driving style. It's also adaptive which means it learns your driving style and if more then one person drives vehicle and they have different driving styles then you might think your having problems. This vehicle pulls good on the highway but could use another 40 HP. 