2020-2026 Audi Rear Suspension Noise TSB 2038689/9

Audi has issued Technical Service Bulletin (TSB) 2038689/9 to address customer concerns regarding rumbling or squeaking noises emanating from the rear of various 2020-2026 Audi models. This bulletin, released on March 4, 2025, provides a detailed explanation and repair procedure for this specific Audi rear suspension noise.

Symptoms

Owners of affected Audi vehicles may notice distinct rumbling or squeaking noises originating from the rear end. These sounds are typically attributed to the bump stops of the shock absorbers. The noises occur because the bump stops are either not seated correctly within the shock absorber mounting or have become dislodged and fallen out entirely.

Diagnosis and Trigger Conditions

According to Audi, the primary cause of this Audi rear suspension noise stems from a design change in the suspension system. The redevelopment of the suspension has resulted in bump stops with increased hardness, making them more challenging to properly press into their mountings during vehicle assembly or pre-delivery inspection.

If the bump stop, which acts as an additional spring, is not fully pushed back into the shock absorber mounting during the pre-delivery inspection, it can drop onto the shock absorber tube. This improper seating leads to the characteristic rumbling or squeaking noises reported by customers.

Repair Procedure Summary

To resolve the Audi rear suspension noise, technicians must correctly secure the bump stops. The procedure involves ensuring that the bump stops are fully pressed into their proper position. An assembly lever, specifically tool number T40401 (SET 900), is recommended to aid in this process.

Additionally, a tire assembly paste can be utilized to facilitate the correct seating of the bump stops. If the bump stops are found to be deformed, technicians should attempt to reshape them correctly by gently warming them up. It is crucial that the bump stops are pressed all the way in and completely secured manually during the pre-delivery inspection to prevent recurrence of the noise.

Required Tools or Parts

To perform this repair, the following special tool is specified:

• Assembly lever T40401 (SET 900)

A tire assembly paste is also recommended as an aid during the installation process.

Important Warnings

Audi explicitly states that this Technical Service Bulletin (TSB) 2038689/9 is informational only and is not applicable to any Audi Warranty. This means that while the TSB provides a solution, the repair may not be covered under standard warranty terms, and owners should clarify this with their dealership.

Furthermore, technicians are advised to "Please ensure that the bump stops are completely secured manually during the pre-delivery inspection." This highlights the importance of proper installation to prevent the issue from occurring.

Owner Action

If your 2020-2026 Audi vehicle is experiencing rumbling or squeaking noises from the rear suspension, it is recommended to contact your authorized Audi dealership. Inform them about the symptoms you are experiencing and mention Technical Service Bulletin (TSB) 2038689/9. The dealership can diagnose the issue and perform the necessary repair to correctly secure the shock absorber bump stops.

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Source: NHTSA ID: 11016504