[OpenYourEyes]

The good news is that it will almost totally eliminate this issue.
The bad news, it's possibly also a workaround, by shutting down the front motor at those speeds to remedy the vibration.

If it was hard to convince the master mechanic in the past, be aware that it will be a lot harder to simulate the issue after these updates are applied. I feel like a ninja, still capable of reproducing the buzzing noise in a tiny operating window. But I have to admit, it's mostly fixed, and if you don't know what you're looking for you'll never know.

I haven’t had those updates installed but just curious how you know they shut the front motor down at those speeds?

Also, in efficiency mode, I believe the car only (or mostly) uses the front motors so how does that work post update? Still feeling the vibrations in efficiency?

Any differences in power post-update? Wouldn‘t it accelerate like a rear-wheel Taycan between those speeds?

 

[Logic]

I haven’t had those updates installed but just curious how you know they shut the front motor down at those speeds?

Also, in efficiency mode, I believe the car only (or mostly) uses the front motors so how does that work post update? Still feeling the vibrations in efficiency?

Any differences in power post-update? Wouldn‘t it accelerate like a rear-wheel Taycan between those speeds?

Here's my conclusion

1) The noise was most noticeable in efficiency mode. And first I thought the ride height could be the culprit, but I quickly concluded -like you've pointed out- the front motor is doing the most of the work in efficiency mode (also, the noise/vibration is coming more from the front).

2) However, when coasting (no drive or regeneration going on), the noise is gone. It's only when you slightly apply or maintain power that you'll hear it.

3) It's noticeable in any mode, also in dynamic mode, when the gearbox stays in 1st gear as long as possible/needed. If the rear drivetrain would be making the noise, than the different gearing should affect the noise and it doesn't.

All points lead me to think it's solely the front drivetrain, although I don't know the root cause. It may stem from some form of imbalance, faulty bearings, misalignement, ... , or just a side effect by design, like the good old quattro center differential made some noises as well.

After the update.
The noise is a mechanical thing, you can't fix the mechanics with software only. But we already knew when the front motor wasn't working (coasting), the noise was gone. It's in Audi's own statement "deactivation of the drive at the front axle". And I can confirm, I believe the software update effectively changed the drivetrain strategy. Driving in efficiency mode feels different, 'RWD biased' and 'RWD only' in these conditions. It will not affect power output, the motor reacts instantly when you need more power. Hence why the noise can still be provoked anytime the front motor is working, anytime you request more power and ride within the affected speed range (38-43 mph). But when you do so, you'll quickly accelerate out of that range, so it's less noticeable and less annoying than before. Just as a side note, 43mph (70kmh) is a speed limit in Belgium so you often drive within the affected range at a constant pace. It's under those circumstances that the noise gets you and I'm glad it's mostly gone now.

 

[OpenYourEyes]

Here's my conclusion


After the update.
The noise is a mechanical thing, you can't fix the mechanics with software only. But we already knew when the front motor wasn't working (coasting), the noise was gone. It's in Audi's own statement "deactivation of the drive at the front axle". And I can confirm, I believe the software update effectively changed the drivetrain strategy. Driving in efficiency mode feels different, 'RWD biased' and 'RWD only' in these conditions. It will not affect power output, the motor reacts instantly when you need more power. Hence why the noise can still be provoked anytime the front motor is working, anytime you request more power and ride within the affected speed range (38-43 mph). But when you do so, you'll quickly accelerate out of that range, so it's less noticeable and less annoying than before. Just as a side note, 43mph (70kmh) is a speed limit in Belgium so you often drive within the affected range at a constant pace. It's under those circumstances that the noise gets you and I'm glad it's mostly gone now.

Thanks Logic for the detailed response!

Completely agree with all your points and you‘ve spelt out the issue as it is and as I have experienced it.

Sounds like the ’proper’ solution to the problem is either replacing the front motor or re-doing the software on affected cars. The vibration can’t be felt when accelerating through those speeds quickly so I‘m expecting the issue to largely go away after the updates are applied.

It is quite annoying driving between 65 and 75km currently, so glad that will be addressed. I feel the vibrations come back at double those speeds too (around 130 - 150km) on the motorway (however much less noticeable because of the road and win noise). Have you seen any improvements there?

 

[Logic]

I feel the vibrations come back at double those speeds too (around 130 - 150km) on the motorway (however much less noticeable because of the road and win noise). Have you seen any improvements there?

Efficiency mode has become my new favorite.

It was already quite difficult to spot and I can't seem to replicate it anymore since the updates, so I think we're good now.

 

[v.smulaitis]

hi,

does anyone got this vibration issue fixed?

mine is doing exactly the same thing starting from 55km/h to 65km/h, and then dissapear at higher speed. Also, you cannot feel it on hard acceleration, only when you pressing acceleration pedal slightly.

any solution? this is very annoying.