2021-2026 Audi High-Voltage Battery Damage TSB

Audi has released Technical Service Bulletin (TSB) 2079520/1, an important informational document for dealerships regarding the handling of damaged high-voltage batteries. This TSB outlines the necessary procedures and resources to ensure that batteries classified as abnormal are processed correctly, safely, and with proper documentation.

Symptoms

Owners may notice an issue with their vehicle's power or electrical system, potentially accompanied by an error message. The primary condition addressed by this TSB is a high-voltage battery that has been classified as abnormal or damaged. This indicates a potential issue with the power supply or data transfer within the high-voltage battery system.

Diagnosis / Trigger Conditions

This TSB is not focused on diagnosing the root cause of battery damage but rather on the subsequent process once a high-voltage battery has been identified and classified as abnormal. The trigger condition for this TSB's procedures is the determination that an Audi high-voltage battery damage event has occurred, requiring specialized handling.

Handling Damaged High-Voltage Batteries

This TSB provides a comprehensive framework for Audi dealerships to correctly process and document high-voltage batteries that are classified as abnormal. The objective is to ensure that all steps are carried out fully and documented sufficiently, adhering to stringent safety and quality requirements. Due to the complexity of the topic, Audi continuously updates the documentation, which may not always be immediately available for all models.

Key Resources for Dealerships

Audi dealerships are directed to several critical documents and resources to manage an Audi high-voltage battery damage event effectively. These include:

• Basic Information on Damaged High-Voltage Batteries: General information and recommendations for processing damaged lithium-ion batteries.
• Personal Protective Equipment (PPE) Briefing: Detailed instructions and a table outlining the necessary Category III personal protective equipment, its protective functions, and requirements.
• Workshop Procedure Plan: A diagram illustrating a typical workshop procedure for high-voltage vehicles, along with qualification requirements for technicians.
• Example Catalogues for PHEVs/BEVs: Aids for assessing damage to high-voltage batteries across various models like the A5, A6, Q5 e-hybrid, Q7, Q8 TFSIe, e-tron GT, Q4, and Q6 A6 e-tron.
• Service TV Updates: Specific updates (0815_HVE update: introduction, 0816_HVE update: classification, 0817_HVE update: moisture, 0818_HVE update: thermal event) providing additional guidance on high-voltage battery issues.
• Vehicle-Specific Workshop Manuals: Information on flushing processes for high-voltage batteries.

Important Note on Implementation

The processes and documents described within this TSB, including the transaction number 2079520/1, will not be fully implemented and available for use in Audi systems until October 29, 2025.

Owner Action

If your Audi displays an error message related to its high-voltage battery, or if you suspect an Audi high-voltage battery damage issue, it is crucial to contact an authorized Audi dealership immediately. They have access to the specific procedures and documentation outlined in TSB 2079520/1 to safely and correctly assess and process the issue. This TSB is informational only and does not apply to any Audi Warranty.

NHTSA ID: 11025249