I had the same leak resulting in fluid leaking to the same spot up there. The nozzles seem to have a check valve that keeps fluid from seeping out. Took me a long time to diagnose. Cabin air filter is just aft of them so as fluid comes out it runs back there while you're driving. Someone else drilled a hole in the reservoir lid to relieve pressure if you read the link and would rather do that.

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Scott

2005 4.8iS TS/BLK