2021-2026 Audi Noise and Vibration Analysis TSB

Symptoms

Owners of affected Audi vehicles may experience various types of noise or vibration complaints. These symptoms often indicate an underlying issue that requires professional diagnosis. Common complaints include:

• Noises, vibrations: crunching/groaning/crackling
• Noises, vibrations: wind noise
• Noises, vibrations: shaking
• Noises, vibrations: chattering
• Noises, vibrations: thumping
• Noises, vibrations: buzzing

These issues can affect the entire vehicle or specific assemblies, and their root cause is often not immediately obvious.

Diagnosis and Trigger Conditions

This TSB, numbered 2070568/4, focuses on the professional analysis of these noise and vibration complaints using specialized equipment. The primary tool for this diagnostic process is the VAS 611 015 PICO-NVH tool.

When a customer reports noise or vibration, technicians will first attempt to duplicate the concern. The TSB acknowledges that identifying the exact root cause can be challenging. The Audi noise vibration analysis process involves using acceleration sensors and microphones to precisely detect the sources of noise and vibrations.

During a test drive, information such as engine speed and vehicle speed is recorded via the VAS 6154 OBD adapter. This data is crucial for subsequent analysis, helping technicians pinpoint the conditions under which the noise or vibration occurs. For Audi e-tron vehicles, specific settings must be selected in the PICO software to ensure accurate vehicle speed signal recording.

Repair Procedure Summary

The TSB outlines a comprehensive approach for technicians to analyze noise and vibration issues. This Audi noise vibration analysis procedure involves several key steps:

1. Tool Setup: Technicians set up the VAS 611 015 PICO-NVH tool, attaching sensors to various positions on the vehicle. Photos of sensor placements are documented.
2. Measurement Drive: A test drive is conducted with a second person operating the test equipment to ensure driver safety and proper data collection. Mileage before and after the drive is recorded.
3. Data Analysis: The recorded data from the PICO-NVH tool is analyzed. Screenshots of the measurement report are attached to the billing documentation.
4. Repositioning (if necessary): If initial analysis is inconclusive, the noise analysis tool may be repositioned, and further measurements taken.
5. Further Test Drives/Analysis: Additional test drives and analysis may be performed until the root cause is identified.

The TSB includes various guidelines and attachments to assist technicians, such as analysis guidelines for the PICO-NVH tool, measuring points on the transmission, and specific measurement positions for different Audi models, including e-tron GT, e-tron, Q8 e-tron, A5, Q5, Q6, and A6 e-tron. It also provides a checklist for vehicle noise complaints.

Required Tools or Parts

To perform the professional noise and vibration analysis described in TSB 2070568/4, Audi technicians utilize specific diagnostic equipment:

• VAS 6154: An OBD adapter used for recording engine speed and road speed.
• VAS 611 015: The PICO-NVH tool, which is central to the noise and vibration analysis.
• VAS 6160/VAS 6150: A VAS tester running the current version of ODIS (Windows 10) diagnostic software.

Technicians must ensure the newest PICO software version is installed, especially for e-tron vehicles, to correctly record vehicle speed signals.

Owner Action

If you are experiencing noise or vibration complaints in your 2021-2026 Audi vehicle, it is recommended to schedule an appointment with an authorized Audi service center. Technicians will utilize the specialized VAS 611 015 PICO-NVH tool and follow the procedures outlined in TSB 2070568/4 to accurately diagnose the issue.

While this TSB provides diagnostic guidelines, it is informational only if your vehicle is outside of its warranty period. For warranty claims, all work must adhere to Audi Warranty Policies and Procedures Manual. Always consult with your dealer regarding potential costs and warranty coverage for any diagnosis and repair.

NHTSA ID: 11021447