2023-2026 Audi Models Loose Zirconium Brake Inserts TSB

Audi has released Technical Service Bulletin (TSB) 2069078/3 to address a specific condition observed in vehicles equipped with ceramic brake systems. This TSB, titled "46 Zirconium inserts in brake piston (ceramic brakes only)," provides guidance for technicians on how to handle loose zirconium inserts found within the brake pistons. The TSB applies to various 2023-2026 Audi models featuring ceramic brakes.

Understanding Audi Ceramic Brake Inserts and Their Purpose

Ceramic brake systems are a high-performance option known for their exceptional stopping power, reduced weight, and superior heat resistance compared to traditional steel brakes. Within these advanced systems, zirconium inserts play a crucial role. Their primary function, as detailed in TSB 2069078/3, is to act as insulators. These inserts prevent the high temperatures generated during braking from transferring directly to the brake piston, and subsequently, to the brake fluid and seals. Maintaining stable temperatures is vital for the longevity and consistent performance of the brake system components.

When these Audi ceramic brake inserts are not firmly attached or become loose, it could potentially compromise their insulating effectiveness over time. While the TSB explicitly states that the brake system's functions are not immediately affected, ensuring these components are correctly seated is part of maintaining the system's integrity and intended thermal management.

Symptoms and Discovery

Unlike many service bulletins that address owner-reported symptoms, TSB 2069078/3 notes that customers typically do not experience specific concerns directly related to loose zirconium inserts. Instead, this condition is usually discovered by technicians during routine diagnostic work or when performing other brake-related services, such as replacing brake pads. The TSB highlights that a technician might observe the zirconium inserts are not firmly attached or can be turned/moved when working on the brake calipers.

While the loose inserts themselves don't typically manifest as owner-perceptible symptoms, vehicles might come into the workshop for a range of general brake-related complaints. These could include various noises and vibrations emanating from the front of the vehicle, such as:

• Noises: Too loud, whistling, buzzing, crunching/groaning/crackling, pinging, humming, chattering, snapping, thumping, general noise, squeaking, or vibrating sounds.
• Appearance/Surface Issues: Observations like flawed coating on brake rotors or calipers, corrosion or rust, or material detaching from brake components.
• Contamination: Instances where brake rotors or pads appear dirty.
• Component Wear: In some cases, high wear of automotive fluids or brake components might be noted.

It's important to reiterate that these general complaints are not direct symptoms of the loose Audi ceramic brake inserts. Rather, they represent common reasons a vehicle might undergo a brake inspection, during which a technician could then identify the loose inserts as per the TSB's guidance.

Diagnosis and Trigger Conditions

Diagnosis for this condition is straightforward and technician-driven. As mentioned, the loose zirconium inserts are not a customer concern but are found during diagnostic work. When a technician is performing maintenance or repairs on the brake calipers, particularly when replacing brake pads, they may notice that the zirconium inserts are not firmly seated in the brake piston. The ability to easily turn or move these inserts indicates the condition described in TSB 2069078/3.

This TSB serves as an informational guide for workshop personnel, ensuring they are aware of this potential finding and the correct procedure to address it, even in the absence of a specific customer complaint regarding the inserts themselves.

Repair Procedure Summary

The repair procedure for loose Audi ceramic brake inserts is relatively simple and does not require extensive component replacement. According to TSB 2069078/3, the primary action is to refit the zirconium insert back into the brake piston. This involves carefully repositioning the insert to ensure it is firmly seated within its designated location. The TSB explicitly states that it is neither necessary nor justified to replace the entire brake caliper, as the loose insert does not impair the overall function of the brake system.

This focused approach ensures that technicians can efficiently resolve the condition without incurring unnecessary costs or replacing functional components. The repair aims to restore the intended secure fit of the zirconium insert, thereby maintaining its thermal insulating properties and contributing to the long-term reliability of the ceramic brake system.

Important Warnings for Owners and Technicians

Owners and technicians should be aware of specific advisories within TSB 2069078/3:

• Do Not Replace Brake Calipers: The TSB explicitly states, "It is neither necessary nor justified to replace the brake caliper." This is a crucial point, as the loose zirconium insert does not compromise the brake caliper's function, and replacing it would be an unnecessary expense.
• Brake System Functionality: The TSB clarifies that "The brake system's functions are not affected" by the loose inserts. This means that while the condition should be addressed, it does not pose an immediate safety risk or operational failure.
• Warranty Information: This TSB is informational only and is not applicable to any Audi Warranty. Owners should discuss any potential costs with their service center, though the repair itself is minimal.

TSB Details and Revisions

This Technical Service Bulletin is identified by Transaction No. 2069078/3. It was initially published on January 5, 2023 (Revision 1). Subsequent revisions include:

• Revision 2: Dated September 10, 2024, which revised the header to add model year information.
• Revision 3: Released on October 21, 2025, further revised the header to add model year information.

These revisions ensure the TSB remains current and accurately reflects the applicable vehicle models and diagnostic information for the Audi ceramic brake inserts issue. Technicians are advised to always refer to the latest version of the TSB and consult with their Parts Department and/or ETKA for the most up-to-date information on parts and procedures.

What Owners Should Do

If you own a 2023-2026 Audi model equipped with ceramic brakes, there's generally no need for immediate concern if you haven't experienced any brake-related issues. Since the loose Audi ceramic brake inserts are typically found during routine service rather than causing noticeable symptoms, the best course of action is to ensure your vehicle receives regular maintenance from an authorized Audi service center. During any brake inspection or service, technicians will be aware of TSB 2069078/3 and can check for this condition and address it if found.

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Source: NHTSA ID: 11025333