I have a 2001 X5 4.4 and my ses light just came on as well. The code was 99162 and they said "I short tested the vehicle and found the fault was caused by the torque converter lockup, excessive slip. With a repair bill of $8,000 which I quickly denied. When I posted these results on here everyone told me to get a second opinion and one guy said he thought they were full of **** So I would be interested in your results and what you end up doing. I think everyone is right on here though.. Dealership is a last resort. I'm searching for a good Indie.. Good Luck