2023-2026 Audi AC Not Working: Compressor Leak TSB

Audi has released Technical Service Bulletin (TSB) 2080034/1 to address complaints of the air conditioning system not working or providing insufficient cooling in various 2023-2026 Audi models. This bulletin specifically points to a refrigerant leak originating from the air conditioner compressor as the root cause of the problem. Owners experiencing a diminished cooling performance or a complete failure of their AC system should be aware of this common issue.

The TSB, released on November 20, 2025, provides guidance for technicians to diagnose and repair the Audi e-tron AC leak and other affected models. It highlights the importance of proper inspection and seal replacement to restore the air conditioning system's functionality.

Symptoms of AC Compressor Leak

Owners of affected Audi vehicles may notice several indicators that suggest a problem with their air conditioning system, potentially due to an AC compressor leak. The primary symptoms include:

• Air conditioning not working: The system fails to blow cold air entirely.
• AC output is insufficient: The air conditioning blows air that is not as cold as expected, or the cooling performance is noticeably weaker.
• Lack of refrigerant in the system: This is a workshop finding, but it directly results in the above symptoms.
• Oil residue on the air conditioner compressor and connecting lines: This is a visual sign of a leak, often made more apparent if a UV tracer dye was previously added to the system during a prior service visit.

Diagnosis of the AC Refrigerant Leak

When diagnosing an Audi e-tron AC leak, technicians will first confirm the customer's complaint regarding the air conditioning performance. A key step in the diagnostic process is to reproduce the issue in the workshop, which often leads to the discovery of a significant lack of refrigerant within the AC system.

Further investigation involves a visual inspection of the air conditioner compressor and its connecting lines. Technicians will look for any signs of oil residue, which is a strong indicator of a refrigerant leak. If a UV tracer dye was previously introduced into the system, the leak point, particularly around the compressor, will be clearly visible under UV light, as illustrated in the TSB's Figure 1, showing an air conditioner compressor with UV tracer in the air conditioning system.

Repair Procedure Summary

The repair procedure outlined in TSB 2080034/1 focuses on addressing the refrigerant leak at its source. The primary step involves replacing the seals on the air conditioner line connections. This must be done before considering the replacement of the entire refrigerant line or the air conditioner compressor itself.

During the seal replacement, technicians are instructed to carefully inspect the connections and coupling points on the air conditioner compressor for any damage around the seal, such as scoring on the connector block. Such damage could compromise the integrity of new seals. After replacing the seals, the system must be re-checked for leaks. If leaks persist, individual components like the air conditioner compressor and connecting lines must be inspected more thoroughly for leaks and replaced as per the instructions in the Audi Workshop Manual. The labor operations associated with this repair include "Drain and fill refrigerant" (code 8703 17XX) and "Air conditioner checked" (code 8701 01XX).

Warranty Information

For vehicles still under warranty, claims for this repair must adhere to the Audi Warranty Policies and Procedures Manual. All claims are subject to review and audit by Audi Warranty. The TSB specifies a Claim Type of "As per TSB 2080034/1" and a Damage Code of "0050", with a Service Number of "87XX". It is important to note that if the vehicle is outside of any warranty period, this Technical Service Bulletin serves as informational guidance only, and repair costs would typically be the owner's responsibility.

Important Documentation for Service

For warranty claims related to this Audi e-tron AC leak or similar issues, proper documentation is crucial. When billing for the repair, service centers are required to attach photos that clearly illustrate the complaint. These images or videos must include the vehicle's VIN and the date, must not be edited, should be in focus with sufficient lighting, and do not require high resolution. Additionally, technicians should mark the precise location of the problem to assist parts analysis. It is also essential to ensure that the photo documentation does not inadvertently show any personal information, such as people's faces, license plates, or customer data.

NHTSA ID: 11026275