2023-2026 Audi Exhaust Tailpipe Corrosion TSB 2042920/3

Audi has issued Technical Service Bulletin (TSB) 2042920/3 to address concerns regarding the appearance of exhaust tailpipes on various 2023-2026 Audi models. This bulletin specifically details issues such as corrosion, rust, flawed coatings, and general contamination. Owners of affected vehicles, including those experiencing Audi e-tron exhaust tailpipe corrosion, should be aware of the recommended maintenance and warranty implications.

This TSB, identified as Transaction No. 2042920/3, was initially published on March 1, 2016, and has undergone several revisions, with the latest release date noted as August 28, 2025. It serves to inform both technicians and vehicle owners about the nature of these cosmetic issues and the appropriate steps for resolution, emphasizing that these are maintenance-related conditions rather than manufacturing defects.

Revision History

Technical Service Bulletin 2042920/3 has been updated multiple times to ensure accuracy and include the latest vehicle information. Owners searching for older bulletin references should note these revisions:

• Revision 1 (March 1, 2016): Initial publication of the bulletin.
• Revision 2 (August 11, 2025): The header was revised to add models and model years.
• Revision 3 (August 28, 2025): The header was further revised to add model year information.

Symptoms

Owners of 2023-2026 Audi vehicles may observe various aesthetic problems with their exhaust tailpipes. These symptoms are categorized by Audi as specific complaint types related to the exhaust system, exhaust gas recirculation, and emissions control components. The primary complaints include:

• Corrosion/Rust: Visible signs of corrosion or rust on the metal surfaces of the exhaust tailpipe trim. This can manifest as discoloration, pitting, or flaking.
• Flawed Coating: The protective coating on the tailpipes may appear damaged, peeling, or otherwise imperfect, compromising the aesthetic finish.
• Dirty Appearance: General accumulation of dirt, road grime, and other environmental contaminants, making the tailpipes look unkempt.
• Contaminated with Soot: Black, oily residue from exhaust gases accumulating on the tailpipe surfaces, which is particularly noticeable on lighter-colored finishes.

These issues can affect both the right and left exhaust tailpipe trims, leading to an undesirable appearance for the vehicle. If you notice any of these conditions, particularly Audi e-tron exhaust tailpipe corrosion, it's important to understand the underlying causes and recommended actions.

Technical Background

According to Audi, the primary cause of corrosion and excessive dirt on exhaust tailpipes is prolonged exposure to environmental factors. Specifically, road salt and other aggressive substances, such as those encountered during winter driving or in coastal areas, can adhere to the tailpipe surfaces. Over time, these substances can damage the material and its protective coating, leading to the observed dirty or rusty appearance.

Audi clarifies that this condition is not considered a manufacturing defect, and there is "no production solution" for this issue. This means the condition arises from external factors and regular vehicle use rather than a fault in the manufacturing process. The TSB operates at an "EH" level, indicating its technical nature.

Important Warnings

Audi explicitly states a critical warning regarding warranty coverage for these tailpipe conditions. The TSB notes that "An accounting under warranty or goodwill is not permitted, claims will be rejected." This means that any costs associated with cleaning or addressing corrosion, rust, or contamination on the exhaust tailpipes will not be covered under the vehicle's warranty. Owners are solely responsible for the maintenance required to prevent or remedy these cosmetic issues, as they are considered normal wear and tear or environmental damage.

Recommended Cleaning and Maintenance Procedure

Since these issues are primarily cosmetic and maintenance-related, the recommended solution involves regular cleaning and proper care. Audi advises that customers be informed that their exhaust tailpipes must be cleaned regularly to prevent the accumulation of aggressive substances and maintain their appearance. The specific cleaning solution recommended by Audi is:

• Industrial Grime Cleaner: Use Part No. ABS 600 000 10, an industrial contamination remover. This product is designed to effectively remove stubborn dirt, soot, and corrosive residues from stainless steel surfaces.
• Alternative Care Products: If the specific Audi part number is not available, owners should use other care products that are explicitly suitable for cleaning stainless steel components. These products should be non-abrasive and designed to protect the metal finish.

The cleaning process should involve applying the chosen cleaner according to its instructions, allowing it to penetrate the grime, and then thoroughly wiping and rinsing the tailpipes to remove all contaminants. Regular application will help prevent the recurrence of corrosion and excessive dirt.

Required Parts

To perform the recommended cleaning, the following part is specified in Technical Service Bulletin 2042920/3:

• Part Number: ABS 600 000 10
• Part Description: Industrial contamination remover
• Quantity: 1

This specific cleaner is recommended for its effectiveness against the types of contamination and corrosion described in the bulletin.

Owner Action

If you own a 2023-2026 Audi model and observe corrosion, rust, flawed coating, or excessive dirt and soot on your exhaust tailpipes, it is important to take proactive steps. Regular inspection and cleaning are essential to maintain the aesthetic condition of your vehicle. As outlined in TSB 2042920/3, these issues are not covered under warranty, making owner-initiated maintenance crucial.

Acquire the recommended industrial contamination remover (Part No. ABS 600 000 10) or a suitable alternative for stainless steel. Incorporate regular cleaning of your exhaust tailpipes into your vehicle maintenance routine, especially if you frequently drive in conditions involving road salt or other aggressive environmental factors. For further guidance on product application or alternative cleaning solutions, consult with an authorized Audi service center.

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Source: NHTSA ID 10255395