2009-2026 Audi Front Noise/Vibration TSB 2074729/1

Audi has released Technical Service Bulletin (TSB) 2074729/1 to address customer complaints regarding various noises and vibrations originating from the front of the vehicle. This bulletin, issued on July 31, 2024, specifically targets issues experienced in dynamic driving mode across a wide range of Audi models from 2009 to 2026. Owners searching for solutions to an Audi e-tron front noise or similar issues in other models will find this information relevant.

Symptoms of Front Noise and Vibration

Owners may notice distinct noises and vibrations coming from the front of the vehicle, the engine compartment, the dashboard, or the center console when driving in dynamic mode. The specific types of noises reported include:

• Humming
• Droning
• Rattling
• Whirring

These symptoms suggest an underlying issue with the vehicle's structure-borne sound system, particularly the actuator designed to manage such vibrations.

Diagnosis and Trigger Conditions

When a customer reports these noises, technicians are instructed to reproduce the symptoms and isolate the source. The primary suspect is the actuator for structure-borne sound, also referred to as an impulse sender, which is located in the plenum chamber. Technicians will perform a final control diagnosis of this component if initial checks do not reveal any obvious installation issues. This diagnostic process helps confirm if the actuator is indeed the root cause of the Audi e-tron front noise or similar issues.

Repair Procedure Summary

The repair process outlined in TSB 2074729/1 focuses on verifying the correct installation and functionality of the structure-borne sound actuator. Technicians will perform the following steps:

1. Initial Inspection: Carefully check the actuator's installation. This includes ensuring the mounting nut is tightened to the correct torque specification.
2. Freedom of Movement: Verify that the actuator has free movement and is not making contact with other vehicle components, such as the body or a bent bracket.
3. Cable Routing: Inspect the routing of the connecting cable to ensure it is not in contact with the vehicle body or under tension.
4. Final Control Diagnosis: If the initial inspection does not reveal any problems, a diagnostic test will be performed on the actuator itself to confirm its operational status.
5. Replacement: If the diagnosis clearly identifies the actuator as the cause of the noise, it will be replaced.

Warranty Information and Important Notes

Audi's Service Number for this bulletin is 2793. When submitting warranty claims related to this issue, specific damage codes are used:

• 0018: Indicates the nut was not tightened correctly or the actuator could not move freely.
• 0029: Pertains to incorrect routing of the connecting cable.
• 0010: Used when the component (actuator) is replaced.

Labor operations for this repair include removing and installing the cowl panel trim or plenum chamber cover (codes 6644 1900 or 8522 1900), checking the actuator (code 2793 0199, 10 time units), and removing/installing the actuator (code 2793 19xx). Diagnostic time is recorded under GFF 0151 0060. It is important to note that if the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only, and repair costs may not be covered. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Owner Action

If you are experiencing humming, droning, rattling, or whirring noises from the front of your Audi, especially in dynamic mode, it is recommended to schedule an appointment with an authorized Audi service center. Inform them about the specific noises and mention Technical Service Bulletin 2074729/1. The technicians will follow the outlined diagnostic and repair procedures to address the issue, potentially resolving the Audi e-tron front noise or similar concerns in your vehicle.

NHTSA ID: 11005865