Great thanks for new information. I thought I was going to have to drain the tank to get it out. It's a blue replacement sensor. I have a black one to install. The old parts are still in a box. I have not thrown any of those parts until I'm satisfied. We drove it 10 miles back to my house. No brake issues. No other codes popped up. For tearing apart half the engine side equipment, I think only one code is amazing.

__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)