Replace the two hoses attached to the power steering reservoir. I did mine three weeks ago. The OEM clamps are a bad design. Plus hoses are brittle. The leak destroyed an OEM alternator. Since replacing the hoses, no more power steering fluid has been lost.

The brace plate under the engine also has a foam pad! The pad holds a lot of oil. It can leak oil for a long time. I learned about the foam pad here. While the alternator is out and battery disconnected, pressure wash the entire area.

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