2022-2026 Audi Brake Disc Corrosion TSB

Audi has issued Technical Service Bulletin (TSB) 2067132/2, superseding previous bulletin 22-26, to provide guidance on addressing corrosion on the friction surface of steel brake discs. This TSB, updated on September 15, 2023, applies to a wide range of Audi vehicles from model years 2022 through 2026.

Symptoms

Owners of affected Audi vehicles may experience the following conditions related to Audi brake disc corrosion:

• "Rust layer on the brake disc."
• "Noises and/or vibrations when braking."

These symptoms are often noticeable after the vehicle has been stationary for extended periods or if the brakes are used lightly, leading to insufficient brake cleaning.

Technical Background

Corrosion on the brake disc friction surface is a common issue that can arise from environmental factors such as moisture, road salt, snow, and dirt. The brake disc material, specifically "flake graphite cast iron," is not resistant to corrosion. It's important to note that an anti-corrosion coating cannot be applied to the friction surfaces of these brake discs.

Regular maintenance of the brake discs, as outlined in the Owner's Manual, is crucial. This includes removing corrosion regularly and avoiding overuse by intensive braking, which can exacerbate the issue of Audi brake disc corrosion.

What Owners Should Know

Audi's TSB 2067132/2 is informational and does not fall under any Audi warranty. This means that any diagnosis or repair related to the conditions described in this bulletin may not be covered by your vehicle's warranty. Owners should consult with their dealership regarding specific coverage.

Repair Procedure Summary

If a customer reports symptoms of Audi brake disc corrosion, a workshop will first confirm the complaint. The recommended service procedure involves a specific test drive designed to clean the brake discs:

1. Extensive Test Drive: Perform a thorough test drive involving several brake operations.
2. ABS Stops: Carefully perform 2-3 ABS stops from speeds exceeding 50 mph. Between each ABS stop, allow the brake components to cool by driving the vehicle for more than one minute at speeds greater than 50 mph.
3. Pad Contact Check: After the test drive, verify that the brake pads are making correct contact with the disc, ensuring they clean the entire surface.

If the condition persists after this procedure, the brake disc and pads should be replaced.

Important Notes

When performing the ABS stops during the test drive, it is crucial to "Do not perform ABS stops if brand new pads and/or discs are installed." This prevents potential damage or improper seating of new components.