2000-2026 Audi Vehicle Vibrations TSB 2074846/2

Audi has issued Technical Service Bulletin (TSB) 44 24 08 2074846/2, dated September 18, 2024, to address customer concerns regarding vibrations and rotational steering wheel vibrations. This bulletin supersedes TSB Group 44 number 24-06, which was dated August 9, 2024. The TSB provides detailed information for diagnosing and repairing vehicles experiencing these issues.

Symptoms

Owners may experience the following symptoms related to this TSB:

• Vibrations at 35 - 70 mph.
• Vibrations noticeable in the seat surface.
• Vibrations felt in the vehicle floor, footwell, or pedal cluster.
• Rotational steering wheel vibrations.
• Vibrations may intensify during braking or accelerating, or occur only during these phases.

Diagnosis and Trigger Conditions

The primary cause of these vibrations is often related to tire radial force variation. Tires naturally have softer and stiffer areas around their circumference due to construction. This variation creates a change in the tire's compression force, known as radial force variation.

To accurately measure radial force variation, a specialized vibration control system, such as the VAS6230(A), is used. This system simulates the tire rolling on a road surface. The peak-to-peak value of radial force variation should not exceed 120N. The first harmonic vibration, which is the most significant contributor to vibrations, must be 80N or less.

Important Note on Flat Spots: Flat spots can develop on tires even after a short stationary period, especially when the tire is warm and then cools down. These flat spots can falsify radial force variation measurements. It is crucial to drive out any flat spots before performing a wheel balancing procedure. Audi states that "Flat spots are normal and not faults covered under warranty."

Repair Procedure Summary

To address the Audi e-tron vibrations and other affected models, technicians should follow these steps:

1. Test Drive: Perform a test drive of up to 20 miles at various speeds, not exceeding 65 mph.
2. Vehicle Preparation: Immediately after the test drive, raise the vehicle so that the wheels are off the ground.
3. Wheel Mounting: Remove the wheels and mount them onto the vibration control system VAS6230(A).
4. Measurement and Balancing: Measure, balance, and if necessary, match the wheel according to the equipment's instructions. The previously mentioned radial force variation values should be used as reference.
5. Wheel Installation: Fit the wheels back onto the vehicle following the instructions provided by the Hunter equipment.
6. Tire Pressure Adjustment: Restore the vehicle's required tire pressure.
7. Final Assessment: Evaluate the vehicle in the speed range where the vibrations were initially reported to confirm the repair.

If the first harmonic vibration of the radial force cannot be brought within the specified limit of 80N through matching, a new tire must be used.

Required Tools

Technicians will require specific tools for this repair:

• VAS 6230 (GSP9700): This is a Road Force Measurement System.
• VAS 6243: This is a Clamping Plate.

Warranty Information

This Technical Service Bulletin provides guidance for warranty claims. The Service Number for this issue is 4440, and the Damage Code is 0013. Various labor operations are specified:

• 4405 9300: For 1 wheel balanced.
• 4405 9351: For 1 wheel matched.
• 4405 940x: For 2/3/4 wheels balanced.
• 4405 945x: For 2/3/4 wheels matched.
• GFF: No allowance.
• 0121 0002: Road test prior to service procedure (10 TU).
• 0121 0004: Road test after service procedure (10 TU).

Important Warnings for Owners:

• "If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only."
• "Only repairs on components which were part of the vehicle when it was delivered can be claimed under warranty."
• All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty. The VAS6230 logs for each wheel and the information sheets must be marked with the VIN and attached to the warranty claim.

What Owners Should Do

If you are experiencing persistent Audi e-tron vibrations or similar issues in your Audi vehicle, it is recommended to schedule an appointment with an authorized Audi dealership. Provide them with the symptoms you are observing. The dealership technicians will use TSB 44 24 08 2074846/2 to diagnose and perform the necessary tire balancing and matching procedures.

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Source: NHTSA ID: 11009347