2021-2023 Audi e-tron Condensation in Electric Drive Motor

Symptoms and Workshop Findings

Owners of affected Audi e-tron vehicles may report various concerns related to the electric drive motor. During workshop inspections, technicians may find condensation on the cover for power electronics connections in the electric drive motor. This specific finding is illustrated in Figure 1 of the Technical Service Bulletin, showing moisture droplets on the internal surface of the cover.

Technical Background

Audi has determined that the presence of Audi e-tron condensation on the cover of the power electronics connections is a normal phenomenon. This condensation occurs due to natural temperature differences and humidity levels within the environment. If the observed moisture is solely condensation, it is not expected to lead to any further issues or affect the performance or longevity of the electric drive motor.

Important Information for Owners

It is crucial for both owners and technicians to understand the implications of this finding. The Technical Service Bulletin explicitly states: "Do not perform additional repairs if water condensation is detected on the inside of the cover for power electronics connection to the motor." This means that if only condensation is present, no corrective action or part replacement is necessary.

However, a critical distinction must be made: "It is important to check that there is no coolant in the area around the bolts. If there is coolant in the connection area this TSB does not apply, and this condition will require diagnosis." Therefore, while Audi e-tron condensation is considered normal, any sign of coolant leakage requires immediate and thorough diagnosis, as it indicates a different, underlying problem.

TSB Revision History

This Technical Service Bulletin, identified as 93 25 47 2070348/2, was initially published on May 17, 2023, as Revision 1. It supersedes an earlier bulletin, Group 93 number 23-07, which was dated May 16, 2023. The current Revision 2, dated January 9, 2025, primarily involved a revision to the header, specifically adding model year information to clarify its applicability.

Warranty Information

Audi has clarified that this Technical Service Bulletin is for informational purposes only. It is not applicable to any Audi Warranty claims. This means that any diagnostic work or repairs performed based on the information in this TSB, if not related to an actual defect, would not typically be covered under standard warranty terms.

Source: NHTSA ID: 11013700