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

Audi has issued Technical Service Bulletin (TSB) 93 24 05 2074807/1 to address a specific noise concern in certain e-tron models. This bulletin provides guidance for technicians to diagnose and repair "tocking noises" emanating from the front drive motor. Owners of affected vehicles experiencing these symptoms should be aware of this official repair procedure.

Symptoms

Owners may notice distinct "tocking noises" originating from the front end of their vehicle. These noises are most prevalent under specific driving conditions. Specifically, the "Audi e-tron tocking noises" can be heard predominantly when the vehicle is under load or during overrun, at speeds between 0 and 25 mph (0 and 40 km/h).

Technical Background and Cause

Audi has identified the root cause of these tocking noises. The issue stems from manufacturing tolerances within the electric drive motor itself. These slight variations can lead to the audible tocking sound during low-speed operation and specific load conditions.

Diagnosis Procedure

To accurately diagnose the "Audi e-tron tocking noises," technicians are instructed to first reproduce the customer complaint. Once the noise is confirmed, specialized equipment is required for further analysis.

The recommended diagnostic tool is the VAS tool 611015, also known as the PICO NVH tool. This tool assists in identifying the precise source of the noise. When using the VAS 611015 for analysis and billing, technicians must also refer to TSB 2070568 for specific guidelines.

Repair Procedure Summary

If the diagnosis confirms that the tocking noise originates from the first electric drive motor on the front axle, the repair involves replacing this component. The TSB 93 24 05 2074807/1 specifies that this repair should only be carried out if all vehicle criteria, such as model type, chassis number, and other relevant codes, match the bulletin's requirements.

Should the noise not be attributed to the first electric drive motor, technicians are advised to investigate other applicable TSBs for alternative solutions. The service procedure includes specific labor operations for setting up the PICO noise analysis tool (0161 00xx) and replacing the front drive motor (9340 55xx). Diagnostic time is recorded as GFF 0150 0060, and road tests before (0121 0002) and after (0121 0004) the procedure are also accounted for.

Required Tools and Parts

For this repair, specific tools and parts are necessary:

• Tool Number: VAS 611015 (PICO NVH tool)
• Parts:
  • Front drive motor (Quantity: 01)
  • Fasteners, Bolts, Nuts, and Screws (as needed; refer to ETKA/ELSA and the repair manual for specific part numbers)

Technicians should always consult their Parts Department and ETKA for the most current information regarding parts and bulletins.

Warranty Information

This Technical Service Bulletin (TSB) 2074807/1 is provided for informational purposes only if the vehicle is outside of its warranty period. All warranty claims submitted for payment must strictly adhere to the Audi Warranty Policies and Procedures Manual. Audi Warranty reserves the right to review and audit all claims.

Source: NHTSA ID 11007274