2022-2026 Audi e-tron GT Brake Disc Surface Cracks TSB

Audi has released Technical Service Bulletin (TSB) 45 24 50 2065341/3 to address customer inquiries regarding the appearance of surface cracks on the tungsten carbide brake discs of certain e-tron GT models. This TSB clarifies that these visible marks are a normal characteristic of the brake system and do not indicate a fault or compromise vehicle safety or performance. Owners searching for information about Audi e-tron GT brake disc surface cracks can find reassurance in this bulletin.

What are "Brake Discs Surface Cracks"?

Owners may observe "Cracks on the friction surface of the tungsten carbide brake disc." These are not signs of damage or defect. The TSB explains that the tungsten carbide brake disc features a hard metal layer applied using a specialized process.

During normal operation, the brake system experiences different temperatures and thermal expansions between this hard metal layer and the base disc. To compensate for these expansions, a network of fine surface cracks, referred to as "relaxation cracks," forms on the disc surface. These Audi e-tron GT brake disc surface cracks are a natural occurrence.

Important Information for Owners

Audi explicitly states that these relaxation cracks are normal and have no negative impact on the functions or comfort of the brake system. Therefore, if you notice these cracks on your vehicle's brake discs, there is no need for concern or immediate action.

Furthermore, this TSB is purely informational. It is not applicable to any Audi Warranty, meaning that the presence of these normal surface cracks will not be covered under warranty for replacement or repair, as they are not considered a defect.

TSB History and Revisions

Technical Service Bulletin 45 24 50 2065341/3 was initially published on December 13, 2021, as Revision 1. It superseded Technical Service Bulletin Group 45 number 23-34, which was dated June 29, 2023. The latest revision, Revision 3, was issued on September 10, 2024, primarily to update the header with added model year information.

What to Do if You Notice Cracks

If you observe Audi e-tron GT brake disc surface cracks on your vehicle, you can have the condition confirmed by an authorized Audi dealership. However, based on the information in TSB 45 24 50 2065341/3, no repair or service action is necessary as these cracks are a normal characteristic of the brake system.

Source: NHTSA ID: 11009352