2021-2026 Audi Damaged High-Voltage Battery Information

Audi Technical Service Bulletin (TSB) 2079520/3, released on January 13, 2026, provides crucial information regarding the handling of Audi damaged high-voltage batteries. This bulletin is designed to assist dealerships in correctly and safely processing high-voltage batteries that have been classified as abnormal. The primary goal is to ensure that all procedures comply with strict safety and quality requirements.

This informational TSB applies to all Audi PHEV and BEV vehicles manufactured between 2021 and 2026. It serves as a foundational resource for technicians, offering a structured approach to managing the complexities associated with damaged high-voltage battery systems.

What is this TSB about?

The purpose of TSB 2079520/3 is to equip Audi dealerships with the necessary documentation and guidance for handling high-voltage batteries that are deemed abnormal or damaged. The technical background emphasizes the need for a structured approach to ensure safety and adherence to quality standards throughout the processing of these critical components. The complex nature of high-voltage battery systems necessitates continuous updates, and Audi plans to add further documentation to this TSB over time.

Important Note for Owners

Owners should be aware that Audi Technical Service Bulletin 2079520/3 is explicitly stated as being informational only. It is not applicable to any Audi Warranty. This means that while the bulletin provides essential guidance for technicians, it does not cover warranty claims related to the processing or repair of Audi damaged high-voltage batteries.

Key Reference Documents and Information

This TSB serves as a central reference point, directing technicians to a variety of detailed documents and resources crucial for managing Audi damaged high-voltage batteries. These resources cover various aspects, from basic information to specific procedural guidelines and safety measures:

• Basic Information on Damaged High-Voltage Batteries: Provides foundational knowledge regarding the characteristics and risks associated with damaged high-voltage battery systems.
• Basic Information on Processing Damaged Lithium-Ion Batteries (PDF): Offers specific guidance on the procedures for safely handling and processing lithium-ion batteries once they have been identified as damaged.
• General Information and Recommendations for Processing Damaged High-Voltage Batteries: Outlines broad recommendations and best practices to ensure a safe and compliant process for all types of damaged high-voltage batteries.
• PPE Briefing and Instructions (PDF): Details the essential personal protective equipment (PPE) required when working with high-voltage batteries, including specific instructions for its use to ensure technician safety.
• PPE Table (PDF): Provides a comprehensive overview of various PPE items, detailing their protective functions and specific requirements for different scenarios.
• Workshop Flow Plan for High-Voltage Vehicles (PDF): Presents a typical workshop procedure diagram for high-voltage vehicles, outlining the necessary steps and qualification requirements for technicians.
• Example Catalogues for PHEVs/BEVs: These documents, such as comparison_sample_catalogue_a5_a6_q5_e-hybrid_q7_q8_tfsie.pdf, comparison_sample_catalogue_e-tron_gt.pdf, comparison_sample_catalogue_q4.pdf, and comparison_sample_catalogue_q6_a6_e-tron.pdf, serve as aids for assessing damage to high-voltage batteries in various Audi plug-in hybrid electric (PHEV) and battery electric vehicle (BEV) models.
• Service TV Updates: These include specific updates such as 0815_HVE update: introduction, 0816_HVE update: classification, 0817_HVE update: moisture, and 0818_HVE update: thermal event, which provide ongoing information and training for technicians.
• Vehicle-Specific Workshop Manuals: These manuals contain detailed procedures, such as Flushing processes for high-voltage batteries, which are critical for specific maintenance and repair tasks.

Revision History of TSB 2079520

Audi TSB 2079520 has undergone several revisions to ensure its accuracy and completeness:

• Revision 3 (January 13, 2026): This revision included an updated attachment and a revised condition section, which added a model table to clarify applicability.
• Revision 2 (October 24, 2025): This revision involved an updated attachment, reflecting changes or additions to the supporting documentation.
• Revision 1 (October 2, 2025): This was the initial publication of the technical service bulletin.

This ongoing revision process highlights Audi's commitment to providing comprehensive and up-to-date information for the safe and effective management of high-voltage battery systems.

Source: NHTSA ID: 11028415