2021-2023 Audi e-tron Tocking Noises from Front Drive Motor

Symptoms

Owners of affected Audi e-tron models may experience "tocking noises" emanating from the front end of the vehicle. These noises are predominantly noticeable under load conditions and during overrun, specifically when driving between 0 and 25 mph (0 and 40 km/h). This specific type of noise is the key indicator for the Audi e-tron tocking noises issue.

Diagnosis and Trigger Conditions

To properly diagnose the Audi e-tron tocking noises, technicians are instructed to first reproduce the customer's complaint. The Technical Service Bulletin 93 24 05 2074807/1 specifies that the noise can typically be reproduced at the front end of the vehicle.

Further analysis requires the use of specialized equipment. The VAS tool 611015, also known as the PICO NVH tool, should be utilized to precisely identify the noise. This tool helps determine if the tocking sound originates from the first electric drive motor on the front axle. If the noise is not confirmed to be from this component, technicians are advised to check for other applicable TSBs.

Repair Procedure Summary

If diagnostic testing confirms that the Audi e-tron tocking noises are caused by the first electric drive motor on the front axle, the repair involves replacing this component. The process includes:

1. Complaint Reproduction: Confirm the customer's reported tocking noises, ensuring they match the conditions described in the TSB.
2. Noise Analysis: Perform a detailed noise analysis using the VAS 611015 (PICO NVH tool) to pinpoint the source of the noise. This step is crucial for accurate diagnosis.
3. Front Drive Motor Replacement: If the noise is attributed to the front electric drive motor, it must be replaced. This is the primary solution outlined in TSB 93 24 05 2074807/1.
4. Post-Repair Road Test: Conduct a road test after the replacement to ensure the tocking noises are no longer present.

Required Tools or Parts

To perform the repair described in TSB 93 24 05 2074807/1, specific tools and parts are necessary:

Tools

• VAS 611015: This is a PICO NVH tool, essential for accurate noise, vibration, and harshness analysis.

Parts

• Front drive motor: Quantity 01. Specific part numbers should be referenced in ETKA.
• Fasteners, Bolts, Nuts, and Screws: As needed, according to the repair manual. These should also be referenced in ETKA/ELSA.

Important Warnings for Owners and Technicians

Audi emphasizes several key points regarding this Technical Service Bulletin:

• Warranty Coverage: "If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only." This means owners of vehicles no longer under warranty may be responsible for repair costs.
• Accurate Diagnosis: "Otherwise, this solution 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." This highlights the importance of correct diagnosis before proceeding with repairs.
• Related TSB: When performing analysis and billing with VAS 611015, technicians must also observe TSB 2070568.
• Information Subject to Change: "All parts and service references provided in this TSB (2074807) are subject to change and/or removal." This indicates that the information in the bulletin may be updated over time.

Owner Action

If your 2021-2023 Audi e-tron is experiencing Audi e-tron tocking noises from the front end, especially at low speeds (0-25 mph or 0-40 km/h), it is recommended to contact an authorized Audi service center. Describe the symptoms clearly to the service advisor. The dealership will perform diagnostic procedures, including the use of specialized tools like the PICO NVH tool, to determine the exact cause of the noise. If the front electric drive motor is identified as the source, its replacement will be recommended. Be aware of your vehicle's warranty status, as this will affect potential repair costs.

Source: NHTSA ID 11007355