Had a low coolant warning and a substantial coolant leak at 53k miles.
The leak was dripping directly under the turbo area near the firewall, not anywhere near the front. I was about to tow to a shop, but thankfully, I found this thread, which let me diagnose the leak source and repair effort.
Looked under the engine cover, and saw a ton of residue around the adapter location and all over everything nearby.
Bought a replacement plastic adapter at a dealer. Unfastened the hard coolant line at the left mounting bracket to help get the hose top end off. The original plastic adapter was intact, but the o-ring had split.
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