Coolant system overhaul complete. After 2k miles, the low coolant warning is turned off. I know the wire was intact when I checked it. It must have been broken inside. After a few more miles, it broke completely. It was an easy find when probed with a voltmeter.

The white clip has to come out carefully. Using a small screwdriver, the pins were released. Another screwdriver pushed the pins out. The broken wire was repaired. Pins were reinserted without issue. Tape and wire loom now protect the harness. Harbor Freight tube holders were installed. The transmission lines no longer teeter the oil cooler. After a test drive, no coolant leaks were seen at the oil cooler. Small holes were drilled into the belly pan low points. A leak will be visible quicker.

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