On Friday last week my wife was driving home in the E39 525I when it lost power and stalled on her. She pulled over to the side of the road got it started then drove it home. I checked the codes with my Peak, the only code was E10 Bank 1 O2 aging. The car has been running fine since, we drove it all weekend with the Torq app monitoring the O2 sensors but I don't see anything out of spec (I monitor the O2 sensors a lot). Car has 93K miles and I was going to change the O2 sensors out at 100k anyway but I'm not convinced an O2 sensor would cause the car to loose power and stall.
Any thoughts and or suggestions on what else I should look for?