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I have the same issue. I can literally smell the coolant when the engine is hot like on a summer day, and both fans are running. It stinks! Yet... my dealer was not able to find a leak nor were they able to smell it. I am perplexed.
The odor of coolant in the passenger compartment, most noticeable when the HVAC is operating, particularly in one of the heating and/or defroster modes, is a classic symptom of a leaking heater core (and sometimes it is a hose attaching to the heater core).
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