2019-2025 Audi e-tron Poor Cabin Heating TSB 2073370/3

TSB Revision History

This Technical Service Bulletin, 80 24 16 2073370/3, was initially published on March 12, 2024. It superseded Technical Service Bulletin Group 80 number 24-15, dated April 5, 2024. Revision 2, issued on April 5, 2024, revised the header to include Model Year 2019. The latest Revision 3, dated May 30, 2024, further updated the header to include Model Year 2025 and revised the service procedure to include a video requirement.

Symptoms of Poor Cabin Heating

Owners of 2019-2025 Audi e-tron, e-tron Sportback, Q8 e-tron, Q8 e-tron Sportback, SQ8 e-tron, and SQ8 Sportback e-tron vehicles may report experiencing "Poor, uneven or no cabin heating output." Specifically, customers often state that "The heating output in the vehicle is insufficient, uneven or there is no heating output." This issue can significantly impact comfort, particularly in colder climates.

Technical Background and Diagnosis

Audi's workshop findings indicate that the primary cause of insufficient Audi e-tron cabin heating is an obstructed or blocked coolant flow through the heat exchanger, identified by part number 4M0816413A. The technical background explains that deposits can accumulate within the cooling system, leading to this obstruction. These deposits compromise the coolant flow, which in turn reduces the effectiveness of the cabin heating system.

Important Warnings and Owner Actions

Owners should be aware that if their vehicle exhibits symptoms of poor Audi e-tron cabin heating, the service technician may request a video of the concern. This video, along with accompanying photos, must be uploaded into the DOC-IT system with the repair order. Photos are required to have a date stamp, VIN reference, and be taken in focus with sufficient light to aid in accurate diagnosis.

Technicians are issued a critical 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 highlights the precision required during the repair process.

Repair Procedure Summary

To address the poor Audi e-tron cabin heating, technicians will first attempt to clear any accumulated deposits by flushing the heat exchanger (4M0816413A) with water. This flushing must be performed in the opposite direction of normal coolant flow. If this flushing procedure is unsuccessful and deposits remain, the heat exchanger will need to be replaced.

For detailed cooling system flushing procedures, technicians are directed to consult ElsaPro or refer to a related Technical Service Bulletin, TSB 2062583, titled "80 The interior vehicle heating is insufficient, and the engine coolant is discolored." This TSB 80 24 16 2073370/3 outlines specific labor operations for the repair. These include:

• Heat exchanger remove and reinstall: Labor operation 9383 1950.
• Clean heat exchanger: Labor operation 9383 2999, with a maximum of 50 Time Units (TU).
• Diagnostic Time (GFF): Labor operation 0150 0060, with a maximum of 100 TU as stated on the diagnostic protocol.
• Charge battery: Labor operation 2706 8950.

Road tests performed prior to and after the service procedure are listed as "No allowance" with 0 TU.

Warranty Information

This Technical Service Bulletin 80 24 16 2073370/3 applies to vehicles covered under Audi's 110 Up to 48 Months/50,000 Miles warranty. For Audi Certified Pre-Owned (CPO) vehicles, the claim type is G10, and owner verification is required. The Service Number associated with this bulletin is 8023, and the Damage Code is 0010. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual. It is important to note that if the vehicle is outside of any warranty coverage, this bulletin serves as informational guidance only, and repair costs may apply to the owner.

Technicians are also advised to always check with their Parts Department and/or ETKA for the latest information on parts bulletins and to consult the Repair Manual for any fasteners, bolts, nuts, and screws that require replacement during the repair.

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Source: NHTSA ID: 11002245