2021-2025 Audi Panoramic Sunroof Leak TSB 2079226/1

Symptoms of an Audi Panoramic Sunroof Leak

Owners of affected 2021-2025 Audi vehicles may notice that "Water enters the vehicle interior. The headliner and/or footwell is wet." This is the primary symptom indicating an issue with the panoramic sliding sunroof. Workshop findings confirm that water is entering the dry area of the wind deflector storage compartment.

Important Warnings for Owners

Audi has issued a crucial warning regarding the repair process: "WARNING: NOT ALL MODIFICATIONS ARE REQUIRED ON A VEHICLE!!! DEPENDING ON THE PRODUCTION CONDITION OF THE VEHICLE, BETWEEN ONE AND THREE MODIFICATIONS MUST BE CARRIED OUT!!!" This means the specific repair steps will vary based on your vehicle's original sunroof configuration. Additionally, technicians are advised to "Ensure that you do not scratch surrounding metal components. You may wish to mask off the surrounding areas first." when performing the modifications.

Technical Background

The root cause of the Audi panoramic sunroof leak is identified as standing water in the wind deflector area. This condition allows water to bypass the intended drainage paths and enter the vehicle's interior. Technical Service Bulletin (TSB) 2079226/1 provides detailed instructions to address this issue by modifying various components of the panoramic sliding sunroof system.

Repair Procedure Summary

The repair for the Audi panoramic sunroof leak involves several modifications depending on the vehicle's production version. These modifications are designed to prevent water from accumulating in the wind deflector area and redirect it properly. The general procedure includes:

1. Attaching Rubber Buffers: For glass panels with short or long PU trim, rubber buffers are attached to the glass panel trim to ensure proper spacing and sealing. This involves cleaning the trim, applying primer, cutting rubber buffers to size (10x10 mm), and firmly pressing them into place.
2. Applying Butyl Barrier to Guide Rail Channel: The guide rail channel, particularly the wind deflector bearing area, is cleaned, primed, and then filled with a butyl adhesive sealing cord. This creates a barrier to prevent water intrusion. The butyl cord is cut into 20 mm pieces and carefully applied using a plastic wedge to ensure the channel is completely filled.
3. Removing Flapper Valve: In some versions, a flapper valve from the front mechanism needs to be removed. This involves removing the front glass panel, then carefully cutting away the water guiding washer and any plastic swarf from the guide rails.
4. Applying Butyl Under Cover Cap: For certain configurations, butyl is applied under the cover cap to enhance sealing. This requires removing the cover cap, cleaning the area, cutting butyl to size (10 mm), and sticking it to the cleaned area before reattaching the cap.

All work must be performed on both sides of the sunroof. The TSB outlines specific modifications required for different production periods, ranging from week 11/2018 to week 10/2025, and also covers service cases where the glass panel or frame has been replaced.

Required Parts and Tools

To perform the modifications described in TSB 2079226/1, the following materials are required:

• Cleaning solution: D 009 401 04 (Quantity: 1x)
• Primer: D 355 205 A2 (Quantity: 1x)
• Butyl adhesive sealing cord: AKL 450 005 05 (Quantity: 0.02x)
• Rubber buffers: 251 201 525 (Quantity: 0.5x)
• Primer applicator: D 009 500 25 (Quantity: 2x)

Technicians should always check with their parts department for the latest information and bulletins.

Warranty Information

For vehicles experiencing an Audi panoramic sunroof leak, warranty claims are processed under specific codes. The Service Number is 6039, and the Damage Code is 0050. Labor operations include:

• Adjust glass panel: 6039 1599 (20 TU)
• Modify glass panel: 6039 4999 (50 TU)
• Remove and install glass panel: 6039 19xx (See SRT with associated operations)
• Remove and install wind deflector: 6033 19xx (See SRT with associated operations)

If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty.

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Source: NHTSA ID: 11023806