First here:
It even happens if the fob isn't inserted.
This noise is on the entire time it's running. It's definitely coming from the speakers.
~60 seconds after shutdown and fob removal, it stops. (ONLY if the car isn't running, stays on otherwise)
Final symptom. I lose reception when the rear defroster is on (not too concerned with this as it appears to be somewhat common.
I've done nothing with this car. It's all stock. I've had it just over a month.
Any ideas? I'm leaning toward faulty HU.
I figured it out. It was the amplifier. I took it out and cleaned the contacts and also cleaned the ground tab that's on the rear wheel arch.
Back to normal.
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