2021-2023 Audi e-tron / e-tron Sportback Poor Cabin Heating TSB

Owners of certain 2021-2023 Audi e-tron and e-tron Sportback vehicles may experience problems with their vehicle's heating system. Audi has released Technical Service Bulletin (TSB) 80 24 17 2073370/4 to address customer complaints of poor, uneven, or no cabin heating output.

This TSB, issued on June 11, 2024, supersedes a previous bulletin (Group 80 number 24-16 dated May 30, 2024) and provides updated service procedures for resolving the Audi e-tron cabin heating problem. The bulletin also covers newer models including the 2024-2025 Q8 e-tron, SQ8 e-tron, Q8 Sportback e-tron, and SQ8 e-tron Sportback.

Symptoms

If you own an affected Audi e-tron or e-tron Sportback, you might notice one or more of the following heating issues:

• "Poor, uneven or no cabin heating output"
• "The heating output in the vehicle is insufficient, uneven or there is no heating output."

These symptoms indicate that the vehicle's interior is not reaching the desired temperature or that the heat distribution is inconsistent.

Diagnosis / Trigger Conditions

According to Audi's technical background, the root cause of the Audi e-tron cabin heating problem is often the accumulation of deposits within the cooling system. These deposits can obstruct coolant flow through the heat exchanger, specifically part number 4M0816413A, thereby compromising the quality of cabin heating.

Technicians can reproduce the complaint and confirm the issue by diagnosing obstructed or blocked coolant flow through the heat exchanger.

Important Warnings

When performing any service related to the heat exchanger, Audi emphasizes a critical warning:

• WARNING: "Please exercise care not to contaminate the refrigerant side of the heat exchanger with water, coolant, moisture, etc. Thoroughly seal off the refrigerant side of the heat exchanger to avoid any intrusion of moisture or contaminants during the cleaning procedure."

This warning highlights the importance of preventing foreign substances from entering the refrigerant system, which could lead to further complications.

Repair Procedure Summary

The primary repair for the Audi e-tron cabin heating issue involves addressing the heat exchanger. Technicians are instructed to first attempt to flush the component with water, flowing in the opposite direction to clear any deposits. This aims to restore proper coolant flow.

If the flushing procedure is unsuccessful and deposits remain, the heat exchanger must be replaced. For additional guidance on cooling system flushing procedures, technicians are directed to refer to ElsaPro or TSB 2062583, titled "80 The interior vehicle heating is insufficient, and the engine coolant is discolored."

Warranty Information

This Technical Service Bulletin outlines specific warranty claim types and labor operations for addressing the Audi e-tron cabin heating problem:

• Claim Types:
  • 110: Applicable for vehicles up to 48 months or 50,000 miles.
  • G10: For Audi Certified Pre-Owned (CPO) vehicles, requiring owner verification.
• Informational Only: If the vehicle is outside of any warranty coverage, this TSB serves as informational guidance only.
• Service Number: 8023
• Damage Code: 0010

Labor Operations:

Operation	Code	Description
Heat exchanger remove/reinstall	9383 1950	See SRT with associated operations
Clean heat exchanger	9383 2999	Use required time supported by punch time (50 TU Max)
Diagnostic Time (GFF)	0150 0060	Time stated on the diagnostic protocol (Max 100 TU)
Charge battery	2706 8950	See SRT with associated operations
Road test prior/after service	No allowance	0 TU

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty.

Owner Action

If you are experiencing poor, uneven, or no cabin heating in your 2021-2023 Audi e-tron or e-tron Sportback, it is recommended to contact your authorized Audi dealership. Inform them about the symptoms you are observing and mention Technical Service Bulletin 80 24 17 2073370/4. Your dealer can diagnose the issue and perform the necessary repairs according to Audi's guidelines.

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Source: NHTSA ID: 11002904