2010-2026 Audi Exterior Rubber Trim Spotted TSB

Audi has issued Technical Service Bulletin (TSB) 66 25 16 2049680/3 to address a common cosmetic concern: Audi exterior trim spotted or stained. This bulletin, which supersedes an earlier version (23-94 dated January 23, 2023), provides guidance for technicians and owners on the cause and resolution of this issue.

Symptoms of Spotted Exterior Rubber Trim

Owners of 2010-2026 Audi vehicles may notice the following conditions:

• The rubber of the window guide is stained.
• The rubber of the window slot trim strip is stained.

These stains typically appear as white or discolored spots on the black rubber components around the windows, impacting the vehicle's aesthetic appeal. Figure 1 in the TSB provides an example of this staining on the window slot trim.

Why Your Audi Exterior Trim Spotted

The primary cause identified for the Audi exterior trim spotted issue is the use of insect cleaner. These cleaners, while effective on paint and glass, can react negatively with the rubber seals and trim strips, leading to visible staining and discoloration.

Repair Procedure Summary

Fortunately, resolving the Audi exterior trim spotted condition is straightforward and does not typically require part replacement. The recommended service procedure involves:

1. Cleaning: The stains can be effectively removed using a soft cloth or sponge along with warm, soapy water. Gently wipe the affected areas to lift the stains.
2. Prevention: It is crucial to avoid using insect cleaner on the rubber seals and trim strips in the future, as this will cause the stains to reappear.

This simple cleaning method is designed to restore the appearance of the rubber trim without the need for specialized tools or chemicals.

Important Warnings for Owners

Audi's TSB includes critical information for vehicle owners and service technicians:

• Do not use insect cleaner on the rubber seals and trim strips. This is the root cause of the staining, and continued use will result in the stains reappearing, negating any cleaning efforts.
• A groundless parts replacement under warranty will be redebited. This warning emphasizes that replacing stained rubber trim without a legitimate defect will not be covered under warranty and will result in charges back to the dealership. This highlights that the issue is cosmetic and preventable, not a manufacturing defect requiring part replacement.

Warranty Information

This Technical Service Bulletin (TSB) is informational only. It is not applicable to any Audi Warranty. This means that the cleaning procedure described, or any costs associated with it, will generally not be covered under your vehicle's factory warranty. Owners are expected to perform the cleaning themselves or bear the cost if they choose to have a dealership perform it.

Revision History

This TSB has undergone several revisions to ensure accuracy and expand its applicability:

• Revision 3 (January 21, 2025): Revised header (added Model Year 2025), updated Condition, Technical Background, and Service sections.
• Revision 2 (January 23, 2023): Revised header to include updated models.
• Revision 1 (December 6, 2017): Initial publication of the bulletin.

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NHTSA ID: 11013723