Has anyone found the source of the drivetrain whine?

[Oce]

Or has anyone gotten a dealer to admit of the issue and to the cause? I have a 2021 4S dual motor. I can hear what sounds like the screech of brakes but I'm not braking and it's only heard at lower levels and typically more prominent if recuperation is active so either it's the sound of recuperation or it's the drivetrain/potential motor(s). The sound can only be heard at low speeds typically under 15 MPH.

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[mystermykee]

How about what sounds like a dog whistle that's tuned down for human hearing? Lol. My car makes that sound, but it's definitely not the brakes. The only other Taycans I've driven have been RWD loaner cars, which do not have that sound. So, I can only attribute it to the front inverter perhaps?

 

[Hirschaj]

There are some older threads on here about this issue. IIRC the conclusion was that it was an inverter causing the noise and Porsche says it’s normal so there is no fix.

 

[Randylip]

Or has anyone gotten a dealer to admit of the issue and to the cause? I have a 2021 4S dual motor. I can hear what sounds like the screech of brakes but I'm not braking and it's only heard at lower levels and typically more prominent if recuperation is active so either it's the sound of recuperation or it's the drivetrain/potential motor(s). The sound can only be heard at low speeds typically under 15 MPH.

 

[Randylip]

My 2022 Taycan 4 whines only slightly if the rear seats are down. Nothing too loud. I assume because the seats are down they pass through the sound more than when the seats are upl

 

[cccmanhattan]

I get more of a deep bassy grown at low speeds with steering input... sounds like the rear brakes dragging or the diff fighting itself. Haven't been able to nail down the cause, but at one point Porsche replaced the entire rear drive unit and it went away, now it's back again.

 

[XLR82XS]

There are some older threads on here about this issue. IIRC the conclusion was that it was an inverter causing the noise and Porsche says it’s normal so there is no fix.

I had my entire drive unit replaced and the noise came back in a few weeks. Sold the car since PCNA wouldnt move forward with a resolution.

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