2021-2023 Audi e-tron Whirring Noises from Rear

Owners of 2021-2023 Audi e-tron and e-tron Sportback models may notice whirring or grinding noises originating from the rear of their vehicle. This condition is specifically observed during gentle acceleration, typically when the vehicle speed is between 9 and 15 mph (15 and 25 km/h). Audi has issued Technical Service Bulletin (TSB) 2074898/2 to address these customer concerns.

Symptoms

Customers report experiencing distinct whirring noises and/or grinding noises emanating from the rear of their vehicle. These sounds are most noticeable when accelerating gently within the speed range of 9 to 15 mph (15 to 25 km/h). The complaint of Audi e-tron whirring noises can often be reproduced by a technician during a test drive.

Technical Background

Audi's workshop findings confirm that the reported noises can be reproduced and are localized to the rear of the vehicle. The Technical Service Bulletin explains that these are "tolerance-related noises from the rear electric drive." Ultimately, Audi classifies these sounds as the normal operating noise of the rear electric drive, indicating they are not indicative of a fault or defect.

Diagnosis Procedure

To properly diagnose the Audi e-tron whirring noises, a technician will first attempt to reproduce the customer's complaint. If the noise is confirmed, the next step involves using specialized equipment.

Technicians are instructed to use the VAS tool 611015, also known as the PICO NVH (Noise, Vibration, and Harshness) tool, for a detailed noise analysis. This process involves a specific measuring setup. Further guidelines for performing this professional noise analysis are detailed in TSB 2070568, titled "00 Professional noise analysis with the VAS 611 015 PICO-NVH tool."

If the analysis confirms that the whirring noise matches the characteristics described in the TSB's analysis guidelines, no further diagnostic steps or repairs are necessary.

Repair Procedure Summary

Based on Technical Service Bulletin 2074898/2, if the whirring or grinding noises from the rear of your Audi e-tron are identified as the tolerance-related operating noise of the rear electric drive, no repair is required. The TSB explicitly states that if the noise is determined to be the described whirring noise, no further analyses or repairs should be carried out. This means the Audi e-tron whirring noises are considered a normal characteristic of the vehicle.

Required Tools or Parts

For diagnosis, technicians will utilize the following specialized tool:

• VAS tool 611015 (PICO NVH tool): This tool is essential for conducting the noise, vibration, and harshness analysis to identify and confirm the nature of the whirring noises.

Warranty Information

For vehicles still under warranty, the diagnostic procedures outlined in TSB 2074898/2 may be covered. The TSB specifies Service Number 9346 and Damage Code 0020 for claim purposes. Labor operations include:

• Set-up time for PICO noise analysis tool (0161 00xx)
• Road test prior to service procedure (0121 0002, 10 TU)
• Road test after service procedure (0121 0004, 10 TU)

If the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only, and any diagnostic costs would typically be the owner's responsibility. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

NHTSA ID: 11028454