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Technical Service Bulletin Transaction No.: 2078651/4
66 Discolorations on external black trim strips Release date: Dec 9, 2025
Condition
Model(s) Year(s) VIN Range Vehicle Specific Equipment
A5 Sportback, $5
Sportback, A6, A7, Q3, and 2019 — 2025
Q8
2019
RS 5
2021 — 2024
2019
RS 5 Sportback
2021 — 2025
Ad, Ad Cabriolet, $5, and
, a 2019 — 2024
S5 Cabriolet All Not applicable
A6 allroad, S6, S7, and
SO8 2020 — 2025
2020 — 2023
RS Q8
2025
RS 6 Avant, and RS 7 2021 — 2025
A7 e quattro 2021 - 2022
Q7, and SQ7 2025
REVISION HISTORY
Revision Date Purpose
4 - Revised Condition (Added model table, documentation requirement image, and
caption)
Revised Warranty (Add labor operations)
3 10/17/2025 Revised header (Add model code)
2 09/12/2025 Revised header (Remove PR criteria)

Customer States:

« There is red/purple (sometimes also grey or metallic) discoloration on the black exterior trim strips (trim strips
in black styling package).
[O}

Documentation required

Technical Background

Due to a specification issue, the paint no longer has optimal UV resistance.

Production Solution

Painting process changed. New wet painting process in series production from 24.10.2024.

Service

If the photo of the complaint corresponds with the example photos (Figures 1-3), the affected components can be
replaced in accordance with the warranty guidelines.

Figure 1. Example of the discoloration.

i

Figure 2. Example of the discoloration.

Figure 2. Example of the discoloration.

When billing, please always attach photos that clearly show the complaint to DOC-IT. To ensure a reference to the
vehicle, the image/video must:

* — Include the VIN and date.
* Must not be edited.
* Should be in focus and taken with sufficient light. A high resolution is not necessary.

If appropriate, please mark the location of the problem so that parts analysis has a clear reference to the complaint.
Please ensure that the photo documentation does not show any people and/or face, license plates, or customer
data.

Sending damaged parts is not necessary.
Warranty

6633 (Roof trim strip)
6448 (Front window slot seal)

6468 (Rear window slot seal)

Claim Type: * — If the vehicle is outside of any warranty, this Technical Service Bulletin is informational
only.
Service Number: | 6475 (Rear side window)

Damage Code:

Labor Operations:

0030
Renew side window 6475 55xx (Avant/Coupe, Sportback) | See SRT
with
associated
operations
Replace 2 side windows 6475 56xx (Avant/Coupe, Sportback) |See SRT
with
associated
operations
Removed and installed roof trim strip |6633 19xx (Avant/Coupe, Sportback) |See SRT
(4K, 4MN, F5) with
associated
operations
Removed and installed 2 roof trim 6633 20xx (Avant/Coupe, Sportback) | See SRT
strips (4K, 4MN, F5) with
associated
operations
Remove and install front window slot | 6448 19xx See SRT
seal with
associated
operations
Remove and install rear window slot 6468 19xx See SRT
seal with
associated
operations
Remove and install rear trim strip 6641 1999 10 TU
Remove and install front trim strip 6621 1999 10 TU

Claim Comment:

As per TSB 2078651/4

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures

Manual. Claims are subject to review or audit by Audi Warranty.

Please note the information on predecessors and items that are included and excluded in the repair operations, as
well as any associated tasks.

Additional Information

All part and service references provided in this TSB (2078651) are subject to change and/or removal. Always check
with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair
Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

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