2021-2026 Audi e-tron High-Voltage Battery Damage TSB

Audi has released Technical Service Bulletin (TSB) 2079520/3 to address the proper handling and processing of high-voltage batteries that are deemed abnormal or damaged in various PHEV and BEV models. This TSB, released on January 13, 2026, serves as a crucial guide for dealerships to ensure safety and quality requirements are met when dealing with such complex components.

Symptoms

The primary condition addressed by this TSB is a high-voltage battery that has been classified as abnormal. This classification indicates potential Audi e-tron battery damage or other issues requiring specialized handling.

Technical Background

The purpose of TSB 2079520/3 is to provide Audi dealerships with comprehensive documentation and a structured approach for processing high-voltage batteries that are classified as abnormal. This ensures that all procedures are carried out fully and documented according to strict safety and quality requirements. The bulletin also references additional information and resources for technicians.

Dealer Processing Guidelines

Due to the inherent complexity of high-voltage battery systems, this TSB serves as a foundational document that points to a series of more detailed resources for dealership technicians. It outlines the need for a structured approach when handling Audi e-tron battery damage or abnormalities.

Key documents and resources referenced include:

• Basic information on damaged high-voltage batteries: General guidelines for initial assessment.
• Basic information on processing damaged lithium-ion batteries.pdf: Specific procedures for lithium-ion battery types.
• General information and recommendations for processing damaged high-voltage batteries: Comprehensive advice for various scenarios.
• PPE briefing and ppe_instructions.pdf: Detailed instructions for personal protective equipment required during handling.
• ppe_table.pdf: An overview of PPE with protective functions and requirements.
• workshop flow plan_high-voltage vehicles_v1.21.pdf: A diagram illustrating the typical workshop procedure for high-voltage vehicles and qualification requirements.
• Example catalogues for PHEVs/BEVs: 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, which serve as aids for assessing damage.
• Service TV updates: Including 0815_HVE (introduction), 0816_HVE (classification), 0817_HVE (moisture), and 0818_HVE (thermal event).
• Vehicle-specific Workshop Manuals: Providing details on processes like flushing for high-voltage batteries.

This TSB is continuously updated with additional documents as the topic evolves, meaning complete documentation for all models may not always be immediately available.

Owner Action

If you suspect your Audi vehicle has Audi e-tron battery damage or if your high-voltage battery is classified as abnormal, it is crucial to contact an authorized Audi dealership immediately. They have access to the detailed procedures and specialized training outlined in TSB 2079520/3 to safely assess and address the issue. This TSB is informational only and does not directly apply to any Audi Warranty, but your dealer can advise on any applicable warranty coverage for diagnosis or repair.

NHTSA ID: 11028415