13 Starter/Generator Drive Belt Is Noisy Or Came Off (GROUP 20, NO. 22-50)
Reference number: GROUP 20, NO. 22-50
Supersedes refnos: 2061461, 2061461/1, 2061461/10, 2061461/11, 2061461/2, 2061461/3, 2061461/4, 2061461/5, 2061461/6, 2061461/7, 2061461/8, 2061461/9, GROUP 13, NO. 20-10, GROUP 13, NO. 20-11, GROUP 13, NO. 21-14, GROUP 13, NO. 21-15, GROUP 13, NO. 23-16, GROUP 13, NO. 23-17, GROUP 13, NO. 23-20, GROUP 13, NO. 24-24, GROUP 13, NO. 24-25, GROUP 13, NO. 24-28
13 STARTER/GENERATOR DRIVE BELT IS NOISY OR CAME OFF
TECHNICAL SERVICE BULLETIN
| AUDI: | 2019-2024 A6; 2021-2024 A4, A4 allroad, A5, A5 Cabriolet, A5 Sportback, Q5, and Q5 Sportback |
| GROUP: | 13 - Engine - Crankshaft/Crankcase |
SERVICE INFORMATION
13 24 28 2061461/11 September 24, 2024. Supersedes Technical Service Bulletin Group 13 number 24-25 dated July 16, 2024, for reasons listed below.
| Model(s) | Year | VIN Range | Vehicle-Specific Equipment |
|---|---|---|---|
| A6 | 2019 - 2024 | All | Not Applicable |
| A4, A4 allroad, A5, A5 Cabriolet, A5 Sportback, Q5, and Q5 Sportback | 2021 - 2024 |
CONDITION
| Revision | Date | Purpose |
|---|---|---|
| 11 | - | Revised Warranty (Updated labor operations) |
| 10 | 07/17/2024 | Revised header (Updated model years) Revised Production Solution (updated solution) Revised Warranty (Updated labor operations) |
| 9 | 03/08/2024 | Revised Warranty
(Updated Labor Operations) Revised Condition (removed DTC code from Workshop Findings) |
Customer states:
- There is a grinding/squeaking/tweeting noise coming from the engine compartment.
and/or
- A message in the driver information system (DIS) displays "Electrical system: Malfunction! Please go to workshop" (if the poly V-belt has fallen off).
Workshop findings:
- The grinding/squeaking/tweeting noise is coming from the poly V-belt (alternator belt).
and/or
- The poly V-belt is damaged or has fallen off the wheel roller.
TECHNICAL BACKGROUND 1
Deviation on the rollers of the belt tensioner.
PRODUCTION SOLUTION
| Vehicle | Belt Tensioner | Poly V-belt | |
|---|---|---|---|
| USA | A4/A5 | WA19AAF48MA085698 (23.07.2021) |
WAUZZZF54RA057164 (16.01.2024) |
| A6/A7 | WAUZZZF24NN007843 (22.07.2021) |
WAUE3BF22RN032270 (14.12.2023) |
|
| Q5 | WA1EAAFY1N2021046 (23.09.2021) |
WA1EAAFY9R2100633 (30.04.2024) |
SERVICE
Scenario 1: Grinding, squeaking, or tweeting noises
- Let the engine run at idle speed and assess the noise.
An example of the noise can be found in the following video:
https://audi-external.kzoplatform.com/player/medium/1823282939031459668 (Figure 1).
- For final confirmation of the source of the noise, spray the inside of the poly V-belt with a little tap water. One spray blast out of a commercially available water spray bottle is enough. The noise should disappear as a result.
- If the noise disappears after spraying with water, replace the poly V-belt and belt tensioner. If a new belt tensioner has already been installed, do not replace it again.
Replacing the belt-driven starter-generator will not fix the problem.
Scenario 2: Poly V-belt damaged or fallen off
- Replace the belt tensioner and poly V-belt. If a new belt tensioner has already been installed, do not replace it again.
Check for correct belt running alignment after poly V-belt and tensioner replacement as follows:
- Run the engine at idle speed.
- The belt must not protrude forward or backward over the roller edge of the tensioner (Figure 2, red marks).
Explanation of Figure 2 (view from above into the engine compartment):
- A = poly V-belt.
- B = tensioning roller of the belt tensioner.
NOTE: Please ensure that the belt tensioner (including the retaining tab) is not damaged during removal. Damage to the component would make analyzing the parts impossible. In such cases, we may charge back the damaged parts.
WARRANTY
| Claim Type: |
|
||
| Service Number: | 1373 | ||
| Damage Code: |
|
||
| Labor Operations: | Ribbed belt remove + install | 1372 19XX | See SRT with associated operations |
| Belt tension damper remove + install | 1373 19XX | See SRT with associated operations | |
| Check Poly V-Belt run alignment | 1372 0199 | 10 TU | |
| Road test prior to the service procedure | No allowance | 0 TU | |
| Road test after the service procedure | No allowance | 0 TU | |
| Claim Comment: | As per TSB 2061461/11 | ||
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.
REQUIRED PARTS AND TOOLS
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
| Part Number | Part Description | Quantity |
|---|---|---|
| See ETKA | Fasteners, Bolts, Nuts, and Screws as needed per the Repair Manual | See ETKA/ELSA |
| See ETKA | Belt Tensioner | 01 |
| See ETKA | Poly-V Belt | 01 |
ADDITIONAL INFORMATION
All part and service references provided in this TSB (2061461) are subject to change and/or removal.
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