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I am wondering if any of you notice a weird sound (jet engine, turbine or something spin at very high speed) when you turn the engine off on your 09 G37x? After 800 miles, the weird sound now disappears.
Your input is greatly appreciated.
did you ever find what the problem was? My 08 g37s just did that when I turned the car off. Sounded like a loud jet engine shutting down. Very embarrassing I’m almost at 180K miles any fix ?