Does this issue pertain to the gearbox? The vehicle model is A5 2.0 TDI with the engine code CNHA and the gearbox type is Multitronic.

[Psychil]

Greetings, everyone!

I am now experiencing an issue with my automobile. I own a 2015 Audi A5 with a 2.0 TDI engine, producing 190 horsepower. The engine model is CNHA and it is equipped with a Multitronic gearbox.
For the last month, I have been experiencing an issue with an unusual sound that is audible exclusively while driving, particularly at speeds ranging from 40 to 60 km/h. The noise is most noticeable when I release the accelerator and the engine speed decreases.
The noise is quite subdued and resembles the sound of a bearing, akin to a gentle sawing noise, as if there is friction occurring.
Although I had the turbine regenerated, the DPF replaced, and the whole suspension examined, the sound persisted.
The odometer reading of my vehicle is 194,000 km.

I am curious whether the issue might perhaps be caused by a faulty bearing inside the gearbox.
In general, the gearbox operates well without any abrupt or sluggish gear shifts.

Has anybody encountered a similar issue?

[stevenkeyte]

There seem to be some unexplainable noises emanating from the engine compartment of your A5.

This low-speed noise, characterised by a quiet cutting and bearing-like sound, may be extremely remarkable.
So far, you have completed the installation of the turbocharger, DPF, and suspension, but there are no further modifications yet, correct?

If your gearbox operates smoothly overall without any abrupt movements, it is possible that a little elusive bearing is causing the issues. Given that your automobile has travelled 194,000 km, it is likely that the gearbox bearing has been worn due to the amount of use it has had.

[Psychil]

Therefore, do you believe that the noise may perhaps originate from the bearings in the gearbox as well?

[Ken_Lion]

What is the car's maintenance record?
and particularly of the gearbox system?

Perhaps you could provide other details about the automobile, such as its year of manufacture and mileage.

[Psychil]

In my first communication, I mentioned the year 2015. The automobile received maintenance at an authorised dealership until it reached a mileage of 170,000 km, and thereafter at independent workshops. The gearbox oil was replaced at 60,000 and 120,000 km. It was not replaced at a value of 180 thousand. As previously stated, the car's odometer presently displays a mileage of 194,000 km.

[Ken_Lion]

Regular maintenance of automatic gearboxes, including oil changes, is crucial.
For a multitronic, one may argue that it is crucial.
Therefore, I recommend promptly starting the process of replacing the oil.
There is no assurance that the issue will be resolved, since there is currently existing noise.

[Psychil]

If I were to replace the oil in the gearbox and find that it does not provide any improvement, I would then need to have the gearbox fixed and repeat the oil change.

[Needsnewtyres2]

The noise you have described might perhaps originate from the front differential. However, I am not knowledgeable about the multitronic gearbox to confirm if the front differential and the multitronic box share the same oil. If the sound were depending on the revolution speed, the tone of the sound should exhibit more variability, not only when the foot is lifted from the accelerator pedal. In my opinion, the sound is unrelated to the engine's revolutions but rather to the act of decelerating by using the engine or gearbox. Are there any discernible characteristics other than the sound? What is the level of acceleration and handling?

[Psychil]

All other aspects are satisfactory except for one particular sound. The ride is characterised by its smoothness, while the acceleration is about.

[ENVIOclev]

Without physically inspecting and test-driving your automobile, it is impossible for anybody to fully comprehend the issue. Begin by doing a scan using vsds.

[Psychil]

I have conducted a thorough check and found no faults in either the engine or gearbox.

[ENVIOclev]

Would you want to schedule an appointment with a professional who specialises in Volkswagen Audi Group (VAG) vehicles?