2021-2023 Audi Dynamic Steering Noises TSB

Audi has issued Technical Service Bulletin (TSB) 48 22 26 2063546/2 to address customer reports of cracking or creaking noises emanating from the dynamic steering system. This bulletin, released on April 28, 2022, is an updated version that supersedes the previous Technical Service Bulletin Group 48 number 21-03, which was dated June 9, 2021. The update primarily involved a revised header and the addition of model years. This TSB provides a crucial diagnostic method for technicians to accurately determine if the dynamic steering actuator is the source of these Audi dynamic steering noises.

This bulletin applies to a broad range of 2021-2023 Audi models equipped with dynamic steering. Owners of vehicles such as the A4, A5, A6, A7, A8, Q5, Q7, Q8, S4, S5, S6, S7, S8, SQ5, SQ7, SQ8, RS 5, and RS 7 may find this information relevant if they are experiencing steering-related noises.

Symptoms of Dynamic Steering Noises

Owners may notice distinct cracking or creaking noises while steering their Audi vehicle. These audible Audi dynamic steering noises can be perceived as coming from various components in the front end. Specifically, the noises have been reported to originate near the steering column, the intermediate steering shaft, the steering rack, and/or the steering wheel itself. These sounds are often intermittent and can be a cause for concern for vehicle owners.

Technical Background

Audi's investigation into these complaints has identified that the root cause of the cracking and creaking sounds is often related to manufacturing tolerances within the dynamic steering actuator. This component plays a vital role in the dynamic steering system, which adjusts steering ratios and effort based on driving conditions. Minor variations in the actuator's internal components can lead to the production of these undesirable noises during steering input.

Diagnostic Procedure for Technicians

To accurately pinpoint whether the dynamic steering actuator is the source of the noise, technicians are instructed to follow a specific diagnostic procedure. This method helps isolate the actuator from other potential noise-generating components within the steering system:

1. Isolate the Dynamic Steering Actuator: The first step involves removing the fuse that powers the dynamic steering system. Technicians are to remove the fuse for the dynamic steering, specifically fuse J792, which corresponds to address word 001B in the vehicle's electrical system. Removing this fuse effectively disables the dynamic steering actuator, preventing it from operating.
2. Test for Noise Recurrence: After the fuse has been removed and the actuator is disabled, the vehicle should be tested to see if the cracking or creaking noises persist during steering.
3. Evaluate Test Results:
   • If the noises no longer occur: If the Audi dynamic steering noises cease after disabling the actuator, it confirms that the dynamic steering actuator is indeed the cause of the sounds previously heard by the owner. This helps narrow down the diagnostic focus.
   • If the noises persist: Should the noises continue even after the dynamic steering actuator is disabled, it indicates that the actuator is not the source of the problem. In this scenario, technicians are advised to continue their investigation into other components of the steering system, as the issue lies elsewhere.

What Owners Should Know

Audi has stated that a production solution for the dynamic steering noises is currently under development. This means that while this TSB provides a method for diagnosis, a definitive repair or an updated part designed to permanently resolve the issue may not yet be available. Owners should be aware that this Technical Service Bulletin 48 22 26 2063546/2 is informational only and is explicitly stated as "not applicable to any warranty." This implies that diagnosis and any potential future repairs related to this issue may not be covered under standard warranty terms. It is essential for owners to consult with their authorized Audi dealer to understand the implications for their specific vehicle and any costs involved.

Next Steps for Owners

If you are experiencing cracking or creaking noises when steering your 2021-2023 Audi, especially sounds similar to those described as Audi dynamic steering noises, it is recommended to schedule an appointment with an authorized Audi service center. While a permanent solution is still in development, the diagnostic procedure outlined in TSB 48 22 26 2063546/2 can help identify if the dynamic steering actuator is the source of the problem. Your dealer can provide the most current information regarding this issue and any available remedies.

Source: NHTSA ID: 10210567