2021 Audi Windshield Streaks and Rough Surface TSB

Owners of certain 2021 Audi models may notice issues with their windshields, including streaking, a distinct snakeskin appearance, or a generally rough surface. These conditions can impair visibility and detract from the driving experience. Audi has issued Technical Service Bulletin (TSB) 64 20 74 2020552/9 to provide a solution for these exterior glass cleaning concerns.

Symptoms

If your 2021 Audi is affected, you might observe one or more of these symptoms on the windshield:

• Windshield streaked: Visible lines or smears that are difficult to clean.
• Snakeskin appearance: A textured or patterned look on the glass, resembling snakeskin.
• Rough surface: The windshield feels uneven or gritty to the touch.

These issues are typically caused by residue accumulation from industrial fallout, normal road dirt, and grime.

Fault codes / DTCs

This particular service bulletin does not list any diagnostic trouble codes (DTCs) or OEM fault labels associated with the windshield streaking or surface issues. The problem is purely cosmetic and related to external contamination.

What the service bulletin says

Technical Service Bulletin 64 20 74 2020552/9 outlines a comprehensive cleaning procedure to address the Audi windshield streaks and other surface imperfections. The process involves several steps:

1. Thoroughly wash and dry all affected exterior glass surfaces.
2. Place the wiper blades in the service position.
3. Clean any residue from the wiper blades using a household glass cleaner (e.g., Windex® or 3M™ Glass Cleaner). It's important not to use the 3M™ Glass Polishing Compound on the wiper blades themselves.
4. Shake the bottle of 3M™ Glass Polishing Compound (Part No: 60150) to ensure even mixing.
5. Apply the polishing compound directly to the outside of the windshield on both the driver and passenger sides.
6. Using a clean, dry 3M™ Microfiber Detail Cloth – Yellow (Part No: 39016), vigorously clean the windshield with long, horizontal strokes, avoiding contact with window trim.
7. Allow the windshield to dry until a fine film or haze forms. Drying time may be longer in temperatures of 60°F (15°C) or lower.
8. Rinse the windshield with a garden hose, ensuring any product inadvertently applied to the trim is also rinsed off.
9. Using another clean, dry microfiber cloth, dry and buff the glass to achieve a clean, streak-free shine.
10. Finally, use a wet, wrung-out microfiber cloth with warm water to wipe off any residue that may have contacted the trim or rubber.

This TSB is informational only and is not applicable to any Audi Warranty claims, meaning the costs associated with this cleaning procedure are typically not covered under warranty.

What to do

If your 2021 Audi is exhibiting Audi windshield streaks, a snakeskin appearance, or a rough surface, you have a few options. You can attempt the detailed cleaning procedure yourself using the recommended products, such as 3M™ Glass Polishing Compound (Part No: 60150) and a 3M™ Microfiber Detail Cloth (Part No: 39016).

Alternatively, you can consult your authorized Audi service center. Be aware that since this TSB is informational and not covered by warranty, you will likely be responsible for any associated labor or material costs. Addressing the Audi windshield streaks promptly can significantly improve visibility and the overall appearance of your vehicle.

Source: NHTSA ID: 10175961