Just started having the same issue. When I’m in sport mode…at speeds between 70 and 120km/h, there is a distinct droning noise from the rear motor (or possibly transmission). If I deactivate sport mode it disappears. Regen has no bearing on this. The same sound can be elicited if I really hammer the accelerator in normal mode. This is because the car drives predominantly in front wheel drive, and when I hammer it the rear motor is forced to kick in. So whatever is droning is related either to the rear motor or the transmission. ALSO…..I found that when I’m just crawling down the driveway at what would be an idle speed, when I activate and deactivate sport mode, a distinct “clunk” can be heard and felt, originating from the rear. The engagement and disengagement of the rear motor is not happening smoothly. Car has 78000km on it. It’s been at the shop for 4 weeks now. Initially they returned it after 2 weeks stating it was resolved thanks to a software remap for the rear motor. But the second I got in and drove it, it was apparent it was not solved. Truth is, they didn’t really know what they were looking for. So when they came to pick it up again, I showed the valet. When it got to Porsche they admitted they still weren’t sure what to listen to for a couple days until they finally had the valet show them. Now they are investigating transmission and rear motor to isolate the sound, and apparently they will be replacing one or both. If anyone is interested I could post a video of the sounds. Just let me know.
It’s not engaging or disengaging of the rear motor but it’s the downshifting from second to first. The whining noise you hear when in ether sport or sport plus mode is from the first gear. In normal mode, the car starts and maintains second gear unless you punch it (below ~56 MPH) then it downshifts so that’s when the noise appears.
That’s interesting. So it’s a transmission issue then?
Issue with the first gear. Search on here and you’ll find loads of threads on them with no resolution. I drive in normal mode 99% of the time after the newness wore off after the first month of ownership so I don’t ever hear the noise
Appreciate the info. Thank you.
Solution is to change the full rear axle with motor+gearboxes etc.
Correct. Noise came back for me after ~800 miles after replacement drive unit.
Don’t want to find out, so I just put it back in normal mode and then it shifts into second. Going to bring it to the dealer.
