Whistle noise after warm up

[postmortem]

After driving for approximately 20 minutes, I start hearing a whistling sound coming from behind the steering wheel. I believe I can also hear it from outside, near the front left side of the car. The sound is present even when the car is parked and idling (as shown in the video). If I rev the engine while parked, the noise becomes slightly louder. Here’s a video for more details:

Is this normal?

2017 CX5 Grand Select 109k miles.

 

[stickerbush]

Not normal, sounds like ignition interference with the audio system but I presume you have the audio sound turned off or muted. Try opening the hood and listening to see if you can better isolate the source. For example, front of engine, back of engine, etc.