2022-2024 Audi Front End Noise TSB 2047920/10

This Technical Service Bulletin (TSB) 2047920/10, issued by Audi, provides guidance for diagnosing and resolving various noises originating from the front end and dash panel of 2022-2024 Audi vehicles. Owners experiencing a persistent Audi e-tron front end noise should be aware of this bulletin. The TSB was last revised on May 9, 2024, and supersedes an earlier bulletin, 24-75, dated March 8, 2024.

Symptoms

Owners may notice a variety of noises from the front of their vehicle while driving. These can include:

• "buzzing, booming, humming, whistling, or a similar noise from the front end."
• Noises that seem to come from the steering area or behind the dash panel.
• Sounds that might be mistaken for "tire rolling noises."

A key characteristic is that these noises are typically reproducible during a test drive, confirming their presence to a technician. If you hear an Audi e-tron front end noise, it's important to have it investigated.

Diagnosis

The TSB indicates that the root cause of these noises is often mechanical damage to the wheel bearing of the front axle. Due to the proximity of components, it can be challenging to differentiate wheel bearing noises from other sounds, such as tire rolling noises.

To accurately diagnose the issue, technicians are advised to use specialized tools like acoustic testers and/or the PICO tool to precisely locate the noise source. The TSB also provides diagnostic questions for technicians to consider:

• Does the frequency of the noise increase or does the sound get higher as the speed increases?
• Does the noise get louder when steering?
• Is the noise still present when slowing down?
• Is the noise amplified on the steering wheel or airbag well?
• Can vibrations be felt on the unpressed coil spring when the wheel is turning?

If the noise cannot be traced to a wheel bearing, further analysis on other components is required. The diagnostic process includes specific labor operations such as "Noise analysis with PICO" (0161 00XX) and road tests before and after service (0121 0002 and 0121 0004, each with 10 TU diagnostic time).

Important Warnings

Audi explicitly states a critical instruction for technicians regarding this issue: "The front wheel bearings should not be replaced in pairs." This prevents unnecessary parts replacement and costs.

Repair Procedure Summary

Once a faulty front axle wheel bearing is identified as the source of the noise, the repair involves replacing the affected component. The specific labor operations vary slightly depending on the vehicle model:

• For A3, Q3, Q4 e-tron, and TT models: Technicians will perform operations such as "Remove and install wheel hub with bearing" (4067 19XX) or "Remove and install 2-wheel hub with bearings" (4067 20XX).
• For all other models: The procedure involves "Replacing wheel bearing" (4057 55XX) or "Replacing 2-wheel bearings" (4057 56XX).

All labor operations are to be performed according to the associated SRT (Standard Repair Time) guidelines.

Required Tools or Parts

Specific part numbers for wheel bearings, fasteners, bolts, nuts, and screws are not listed directly in the TSB. Technicians are instructed to consult ETKA (Electronic Parts Catalog) and/or ELSA (Electronic Service Information System) for the latest information and part bulletins. Generally, one wheel bearing is required per affected side.

Warranty Information

This repair falls under Audi's warranty policy for vehicles up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, the G10 claim type applies, requiring owner verification. If the vehicle is outside of its warranty period, this Technical Service Bulletin (Service Number 4057, Damage Code 0020) serves as informational guidance only. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

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Source: NHTSA ID 11002223