I hear ya - its now a question of how to locate its origin ,- sines , said use a lift , I said dyno - I think his idea is the most cost effective and most accessable - get the damn thing up in the air running w someone in the drivers seat changing rpms / speed / gears - you can at least start to eliminate what its not -This member has exactly the same issue - the first video. In this video, it starts at 50m/h, and this sound is similar to the jet engine.
Make this video louder, and you will hear this noise after 50m/h on the odometer.
High-Pitched whining noise coming from a 2023 Mazda CX-5 Turbo when accelerating or decelerating between 30mph to 60mph. The noise is more prominent between ...www.youtube.com