Very faint high pitched "mosquito" sound

[veritas80]

Did you see the post above about the insulation modification?

I don't think this has been successful as an actual fix

 

[chickdr]

From what I remember the person who had it done said it worked.

 

[aerajan]

I purchased a 2025 new carbon turbo and have this noise. Has anyone ever found a definitive solution to it? I’ve read this whole thread and it sounds like the insulation works initially but then doesn’t work. It also seems like it is coming from injection pump?

 

[cz5gt]

the turbo noise or the whistling at high speeds? Which one?
the turbo noise is normal when car is under load and accelerating. Sounds like slight buzzing which disappers when yoy get your foot off the gas pedal.
2025 should not have the door whistling at higher speed as that insulation is updated on the door.

 

[N7turbo]

the turbo noise is normal when car is under load and accelerating. Sounds like slight buzzing which disappers when yoy get your foot off the gas pedal.

But sometimes it doesn't. It stops for a moment, then resumes at idle. At least on my car it does.

 

[Wobblez]

Hello i purchased a Cx5 Signature late last month and i have had the same issue mentioned here with the Buzzing sound when idled/ speeding up that is worse in the cold. I just took it to Mazda and they are saying the engine needs to "break in". They said the sound is the from the fuel injectors. I wanted to know if anyone has made any progress to an actual solution for this. thanks in advance

 

[N7turbo]

Hello i purchased a Cx5 Signature late last month and i have had the same issue mentioned here with the Buzzing sound when idled/ speeding up that is worse in the cold. I just took it to Mazda and they are saying the engine needs to "break in". They said the sound is the from the fuel injectors. I wanted to know if anyone has made any progress to an actual solution for this. thanks in advance

I've had this a lot lately in the cold weather. It modulates with throttle, often disappearing momentarily when you take your foot off the gas, but then coming back. I'm sure everything is working normally, but it would be nice to quiet that sound.