Ok, so I found time to check out my x5. To my surprise, it drove out of my driveway just fine, so I took it for a spin. I got on the highway going 65-70 mph for like 5 miles, and then the problem started again. I saw the rpm dip slightly and then it started slowing down gradually again. I pulled over to the emergency lane. I shut it off and sat for about a minute and fired it back up. It was ok again so I took the next exit to get back to the streets. I drove about 5 miles to get home driving around 35-45 mph with no issues. Apparently, it seems to happen when I’m driving on the hwy.