37 Noises After Selecting A Gear While Idling And The Vehicle Is Stationary, Or While Driving (GROUP 37, NO. 25-33)

WARNING: This page is about the A4 Quattro Premium, 2.0L Eng VIN A, which is a different variant/trim than selected.

Publication date: 2025-05-22
Reference number: GROUP 37, NO. 25-33
Supersedes refnos: (2074806/1), (2074806/3), 2074806/2, GROUP 37, NO. 24-20, GROUP 37, NO. 24-28

37 NOISES AFTER SELECTING A GEAR WHILE IDLING AND THE VEHICLE IS STATIONARY, OR WHILE DRIVING

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 37, NO. 25-33 (2074806/3), Date of Issue: May 22, 2025

AUDI:	2016-2025 A6; 2017-2025 A4, and A4 allroad; 2018-2025 A5 Sportback, and Q5; 2018-2024 A5, and A5 Cabriolet; 2019-2025 A7; 2020-2025 A6 allroad; 2021-2025 Q5 Sportback
GROUP:	37 - Automatic Transmission - Controls, Case

Superceded Bulletin(s): GROUP 37, NO. 24-28, Date of Issue: November 22, 2024

SERVICE INFORMATION

37 25 33 2074806/3 May 22, 2025. Supersedes Technical Service Bulletin Group 37 number 24-28 dated November 22, 2024, for reasons listed below.

APPLICABLE MODELS AND YEARS

Model(s)	Year	VIN Range	Vehicle-Specific Equipment
A6	2016 - 2025	All	Not Applicable
A4, and A4 allroad	2017 - 2025
A5 Sportback, and Q5	2018 - 2025
A5, and A5 Cabriolet	2018 - 2024
A7	2019 - 2025
A6 allroad	2020 - 2025
Q5 Sportback	2021 - 2025

CONDITION

REVISION HISTORY

Revision	Date	Purpose
3	-	Revised title (Updated for clarity) Revised header (Updated models)
2	11/22/2024	Revised header (Adjusted models)
1	07/31/2024	Initial publication

Customer States:

Noises after selecting a gear at idle speed when the vehicle is stationary.

and/or

Noises when driving in odd-numbered gears (1st, 3rd, 5th gear).

and/or

Noises when driving in even-numbered gears (R, 2nd, 4th gear).

and/or

Oil loss.

Workshop findings:

The customer complaint(s) can be reproduced.

and/or

The noise in the vehicle interior can be reproduced (see Figure 1).

NOTE: The noises change when a gear is selected/deselected (Figure 2).

For an example of the interior noise, see the video located at: https://audiexternal. kzoplatform.com/player/medium/2800199503309706803

For an example of the noise change with gear selected/deselected, see the video located at: https://audiexternal. kzoplatform.com/player/medium/2800204564878333790

and/or

Noises from rear of gearbox (Figure 3).

NOTE: The noises change with the engine speed (Figure 4).

For an example of the gearbox noise, see the video located at: https://audiexternal.kzoplatform.com/player/medium/2800197105174451664

For an example of the noise change with engine speed, see the video located at: https://audiexternal. kzoplatform.com/player/medium/2800200895248209535

and/or

Noises from the area of the dual-mass flywheel (service flap).

and/or

Evidence of ATF loss when the service flap is open.

and/or

The noises can be allocated to accelerometer 1 and/or 2 using the Pico NVH tool (VAS 611015).

Please observe the instructions under Service.

and/or

Abrasion visible on the permanent magnets of the oil pan (see Figure 5).

TECHNICAL BACKGROUND 1

Bearing A (Figure 9) on dual clutch.

PRODUCTION SOLUTION

Not applicable.

SERVICE

NOTE: Try to reproduce the customer complaint (based on the description/workshop findings/event memory entries), so that it can be clearly assigned to this TSB. The following repair must only be carried out ifall the criteria (model/type, chassis number, engine/gearbox code, PR number(s), part number, software version, code etc.) apply exactly. Otherwise, this measure will not eliminate the problem, and repeat repairs may be necessary. In such a case, we may reject the warranty claim and charge back the cost of the parts.

Optional additional information through analysis with Pico NVH tool (VAS 611015):

Attach acceleration sensors and microphone as described under "Measuring points_page_1" and "Measuring points_page_2".

Analysis of the measurement via acceleration sensor 1/channel A and acceleration sensor 2/channel B.

Frequency range of approx. 250-600Hz can be detected here.

Please also provide an audio and/or video file and/or photos that clearly document your findings.

Also perform a visual inspection of bearing A in the cover for the dual clutch and document your findings with detailed photos.

To do so, remove the oil seal on bearing A (Figure 9 -> marked in red) of the dual clutch that was removed.
Document any possible malfunctions of bearing A (see Figure 10 -> red arrow) with a photo clearly showing the issue.

Perform the following measures as described in the Workshop Manual:

Decision on repair level that can be performed -> based on repair work required for bearing A:
- Replace bearing A in cover for dual clutch if you find the following functional issue on bearing A:
- Wear can be seen on bearing A and ball cage is still in bearing A (see Figure 11).
- Replace the entire dual clutch if you find the following functional issue in the installation space around bearing A:
- Ball cage no longer in bearing A or irreparable damage to ball cage -> ball guidance no longer Provided (see Figures 11 and 12).
Further repair steps:
- Replace the high-pressure filter, the low-pressure filter and the intake filter.
  - After removing the filter, thoroughly clean the valve body in this area and avoid getting it dirty.
- Replace the permanent magnets in the gearbox oil pan.
- Also replace the ATF.
After completing the measures, carry out the following basic settings of the gearbox in the order listed here:
- Calibration of clutch valves -N215,-N216.
- Calibration of movement sensors -G487...G490.
- Clutch engagement point adaptation.
Do not delete any learnt values for the gearbox!

Do not complete the test plans of the Guided Fault Finding for:

Replacing gearbox; replacing mechatronic unit; and/or replacing valve body.

Do not update the gearbox software as part of this measure.

If the documentation of the test steps is incomplete (e.g. without photos), the warranty claim may be rejected.

A technical repair query is not necessary.

WARRANTY

WARRANTY INFORMATION

Claim Type:	If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only.
Service Number:	Dual Clutch Replacement: 3060, Bearing A replacement: 3059
Damage Code:	Dual Clutch Replacement: 0010, Bearing A replacement: 0015
Labor Operations:	Remove and install gearbox	3435 19xx	See SRT with associated operations
	Remove and install multiple clutch	3060 19xx	See SRT with associated operations
	Replace input shaft bearing	3545 5599	Please bill according to the time required
	Replace (all) oil filters (includes remove, install, and clean mechatronic unit)	3488 5599	190 TU
	Gearbox oil pan (replace magnet)	3460 5599	10 TU
	Check bearing (take photo of bearing)	3546 0199	10 TU
Diagnostic Time:	GFF	0150 0060	Labor according to the diagnostic log
	Set-up time for noise analysis tool	0161 0000	See SRT with associated operations
	Charge battery	2706 8950	See SRT with associated operations
Claim Comment:	As per TSB 2074806/3

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual . Claims are subject to review or audit by Audi Warranty.

ADDITIONAL INFORMATION

All part and service references provided in this TSB (2074806) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

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