On vacation at RMNP, and my X5M went into reduced ...

On vacation at RMNP, and my X5M went into reduced power mode. Took the car in on Monday and informed them I needed the car repaired by noon Friday to check out of campsite. They diagnosed the issue on Tuesday as a bad filtered air duct which had just been replaced 6 weeks prior by BMW dealership, and a bad turbo sensor. They refused to honor the BMW 2yr/24 month warranty on replacement parts and charged me $712 for replacing the same part again in 2 months, even though it failed due to bad installation they claimed by a BMW dealer. By Friday the service adviser still had not even ordered the replacement turbo sensor (even after calling them daily to get on the ball), and said it wouldn't be available to be installed until next week Monday. As my vacation was over had to pick up the car to move my travel trailer out of my campsite. The car ran more poorly than when I brought it in, instantly going into limp mode (before I brought it in it would clear after restarting). Charged me again for the same repair, and didn't fix the car after 1 week in for service, even though the problem was caused by a failed turbo pressure sensor.