2021 Audi A4/A5/S4/S5/RS5 Squeaking Steering Shaft

Symptoms of a Squeaking Steering Shaft

Owners of affected Audi models may notice a distinct squeaking noise emanating from the steering column, especially when steering slowly. This Audi steering squeaking noise can become more pronounced or louder in higher temperatures or during longer journeys.

Diagnosis and Technical Background

Workshop technicians have identified that the squeaking noise originates from the sealing sleeve or the steering column opening on the bulkhead. This often occurs when the steering column adjustment is set in the lower range, causing the steering shaft to rest on the cone of the sealing sleeve.

The underlying technical reason for this Audi steering squeaking noise is an incorrect positioning of the sealing sleeve (also known as the sealing lip) within the bulkhead. This, combined with unfavorable manufacturing tolerances of the components, leads to the friction and subsequent noise.

Important Warnings

Audi has issued a critical warning regarding the repair procedure: "There is a risk of accident due to an absence of traction if the steering intermediate shaft is installed incorrectly. Pay attention to the installation position and installation instructions."

Repair Procedure Summary

To address the squeaking noise, Audi Technical Service Bulletin 48 21 96 2055733/2 details a specific repair process. The procedure involves carefully repositioning the intermediate steering shaft and its associated rubber boot.

First, the intermediate steering shaft is disconnected from the steering column. Next, the rubber sealing sleeve (labeled 'A' in Figure 2 of the TSB) is loosened and pushed upwards as far as possible before being retightened. Finally, the intermediate steering shaft (labeled 'B' in Figure 3) is reinstalled to the steering column (labeled 'C') and secured with new bolts (labeled 'D'). This ensures proper alignment and resolves the friction causing the squeak.

It is important to note that this procedure requires the use of mandatory replaceable parts. Technicians are advised to consult the component overview and parts catalog before beginning the repair.

Required Parts and Tools

For this repair, technicians should consult ETKA (Electronic Parts Catalog) for the latest information on fasteners, bolts, nuts, and screws required. Specific part numbers for these items are not listed in the TSB but are determined based on the repair manual.

Warranty Information

This repair, identified under Service Number 4816 and Damage Code 0010, may be covered under warranty. For new vehicles, coverage typically extends up to 48 months or 50,000 miles, whichever comes first. For Certified Pre-Owned (CPO) vehicles, the G10 claim type applies, requiring verification of owner status.

If the vehicle is outside of warranty coverage, this Technical Service Bulletin 2055733/2 serves as informational guidance for diagnosis and repair. Labor operations for repositioning the intermediate steering shaft are coded as 4816 1900. Diagnostic time and road test procedures before and after service are typically performed without additional allowance.

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Source: NHTSA ID: 10189144