93U9 – High-Voltage Battery Modules May Overheat – 2020-2022 Audi E-Tron Sportback Quattro & 2019-2022 E-Tron Quattro

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December 20, 2023 NHTSA CAMPAIGN NUMBER: 23V867000

High-Voltage Battery Modules May Overheat

A high-voltage battery that overheats increases the risk of a fire.

 

NHTSA Campaign Number: 23V867

Manufacturer Volkswagen Group of America, Inc.

Components ELECTRICAL SYSTEM

Potential Number of Units Affected 26,866

 

Summary

Volkswagen Group of America, Inc. (Audi) is recalling certain 2020-2022 E-Tron Sportback Quattro and 2019-2022 E-Tron Quattro vehicles. Certain high-voltage battery modules may overheat.

 

Remedy

Dealers will install onboard diagnostic software to monitor battery module performance, and replace affected battery modules where necessary, free of charge. Interim owner notification letters explaining the safety risk are expected to be mailed February 16, 2024. Owners will receive a second notice once the remedy becomes available, anticipated in 3rd Quarter 2024. Owners may contact Audi customer at 1-800-253-2834. Audi’s number for this recall is 93U9.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 

Check if your Audi has a Recall

 


Affected Vehicles

Country Beginning Model Year Ending Model Year Vehicle Vehicle Count
USA 2019 2022 E-TRON QUATTRO 21,981
USA 2020 2022 E-TRON SPORTBACK QUATTRO 4,885
CAN 2019 2022 E-TRON QUATTRO 1,457
CAN 2020 2022 E-TRON SPORTBACK QUATTRO 559

 

Issue:

A potentially critical self-discharge condition exists in certain high-voltage battery modules that, in some instances, may lead to thermal overload, possibly resulting in smoke or a fire. A high-voltage battery overheating increases the risk of a fire. Affected high-voltage batteries may experience a loss of range and/or performance as an early indication.
Audi is working on an interim measure to help provide support for vehicles in this recall until the remedy becomes available. More information will be provided at a later date once the details of the interim measure are defined.

 

Repair:

  • REPAIR NOT YET AVAILABLE
  • Dealers and owners will be notified in writing once the remedy is available.
  • Check daily campaign open inventory report or OMD for affected vehicles in inventory.

 


Chronology of Defect

In April 2020, Audi received a claim from outside of the U.S. alleging that the high-voltage battery pack in an Audi e-tron quattro vehicle caused a fire. Audi opened a product investigation on June 10, 2020 to investigate that claim and the potential root cause together with the HV battery supplier. At that point the battery module was ruled out as the root cause of the thermal event.

Between mid-2020 and mid-2023, Audi became aware of additional thermal event cases and conducted in detail investigations, onsite vehicle inspections, and part analyses to investigate the origin of the fires. Audi also worked with LG Energy Solutions, the supplier of the high-voltage battery cells, to identify a potential root cause. The analyses pointed towards a potential issue with the cell module controller.
As part of the continued analysis, vehicle battery performance data was monitored closely and a lifetime endurance campaign carried out in certain markets in 2021 and 2022. These actions did not reveal any new results with respect to the analysis of the potential root cause.

In April 2022, Audi launched service campaign 93N6 with a software update of the battery to improve the balancing of the cell modules. In preparation for this campaign, 93P1 had to be carried out on some vehicles in the market. With the software updates from these two campaigns, the function of the control units has been optimized in terms of balancing and the cell voltage measurement has been stabilized.

Audi continued the field monitoring and investigation of additional field cases.

July – November 2023: After noticing an increase in field cases, all available data from those cases were analyzed and the data indicated that a previous self-discharge condition could be indicative of an issue with the HV battery modules.

December 20, 2023
December 13, 2023: Even though the root cause analysis is ongoing, out of an abundance of caution, the Audi Product Safety Committee decided to conduct a voluntary safety recall on all potentially affected vehicles worldwide.
Audi is aware of five (5) thermal event cases in the U.S. which could be potentially related to a self-discharge condition of a high-voltage battery module. These occurred on the following dates:

  • 19.07.2022
  • 21.11.2022
  • 27.10.2023 – analysis ongoing
  • 05.11.2023 – analysis ongoing
  • 09.11.2023 – analysis ongoing

Audi is not aware of any deaths or injuries due to this condition.

 


4 Affected Products

Vehicle

MAKE MODEL YEAR
AUDI E-TRON 2019-2022

 


4 Associated Documents

Recall Acknowledgement

RCAK-23V867-8178.pdf 645.805KB

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Defect Notice 573 Report

RCLRPT-23V867-4686.PDF 216.092KB

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Manufacturer Notices(to Dealers,etc)

RCMN-23V867-7848.pdf 232.228KB

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Chronology

RMISC-23V867-9235.pdf 222.127KB

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Latest Recalls Documents

For the Latest and Most recent Recall Information Visit the link below…

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=23V867&docType=RCL

 


 

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Last update on 2024-03-25 / Affiliate links / Images from Amazon Product Advertising API

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