Whistling Sound Mystery - Toyota C-HR

[Lavender Girl]

Hi all,
First time posting in this forum please forgive me if this is the wrong place, just after some advice before I shell out taking the car to Toyota please.

Wondering if you can help me.
There's a whistling sound coming from my Toyota CHR, (2019, 1.8 litre, Hybrid with 77K on the clock). It's sporadic, and not necessarily when I brake, speed up or anything in particular. Sometimes it happens when I get going, or straight away, it happens both in EV and normal mode, sometimes moreso when I pull left, but at low speeds mostly.

My brake pads are fine with plenty of wear left, wheel alignment is also fine, my local mechanic and kwik fit were baffled as it doesn’t always happen so hard to demonstrate. I've turned of the air con, and checked all seals and it's not that and I just can't figure it out. Sounds like it comes more from the offside, but I can't be sure.
It doesn't seem to cause any issues, no warning lights, it's just annoying and embarrassing.
I recorded the sound and put it on youtube:

Anyone have any ideas please? Driving me nuts!
thanks a million!

 

[Burnerman]

I’d strip out the brake pads, give them and the caliper a thorough clean to remove all of the dust that will certainly be there.
Fronts first, then the rear.
Just because the pads have material left doesn’t mean anything.
John

 

[Lavender Girl]

I’d strip out the brake pads, give them and the caliper a thorough clean to remove all of the dust that will certainly be there.
Fronts first, then the rear.
Just because the pads have material left doesn’t mean anything.
John

Thanks John, will get someone to do that! cheers

 

[Murdochcat]

Try here

https://www.chrforums.uk/

 

[Lavender Girl]

Try here

https://www.chrforums.uk/

Thanks I did try there first a few months back, no ideas sadly. Thanks though