2025 Audi A5/Q5/S5/SQ5 Tire Pressure Warning TSB

Audi Technical Service Bulletin (TSB) 2077226/3, released on July 22, 2025, provides crucial information for diagnosing and resolving various warning and malfunction messages related to tire pressure and loose wheels in certain 2025 Audi models. This TSB is particularly relevant for owners of the 2025 Audi A5, Q5, S5, and SQ5 who might encounter unexpected alerts on their instrument clusters. The bulletin aims to guide technicians in identifying and rectifying the underlying causes of these warnings, thereby ensuring both vehicle safety and optimal performance. The presence of a "2025 Audi A5 tire pressure warning" or a "loose wheel warning" can be concerning, and this document offers a structured approach to addressing such issues.

Symptoms and Related Malfunctions

Owners of affected 2025 Audi A5, Q5, S5, and SQ5 vehicles may observe a variety of warning or malfunction display symbols on their instrument cluster. The most common complaints include an active "loose wheel warning" or "tire pressure warning" message. These alerts can appear either independently or in conjunction with other system notifications, indicating a broader electrical or sensor-related issue.

The TSB specifically lists several verbatim messages and malfunction displays that technicians and owners might encounter:

• "information, navigation, communication, entertainment -> malfunction display symbols -> shock absorber control system malfunction display"
• "information, navigation, communication, entertainment -> malfunction display symbols -> tire pressure monitoring system malfunction display"
• "information, navigation, communication, entertainment -> information display symbols -> tire pressure loss information display"
• "information, navigation, communication, entertainment -> warning display symbols -> parking brake warning display"
• "information, navigation, communication, entertainment -> warning display symbols -> power steering failure warning display"
• "information, navigation, communication, entertainment -> information display symbols -> tire pressure information display"
• "information, navigation, communication, entertainment -> malfunction display symbols -> parking brake malfunction display"
• "information, navigation, communication, entertainment -> indicator display symbols -> parking brake indicator display"
• "information, navigation, communication, entertainment -> warning display symbols -> loose wheel warning"
• "information, navigation, communication, entertainment -> warning display symbols -> tire pressure loss warning display"
• "information, navigation, communication, entertainment -> information display symbols -> tire pressure monitoring system adaptation mode information display"
• "information, navigation, communication, entertainment -> warning display symbols -> brake failure warning display"
• "information, navigation, communication, entertainment -> malfunction display symbols -> ABS malfunction display"
• "information, navigation, communication, entertainment -> indicator display symbols -> driving dynamics regulation (ESC) indicator display"

These diverse messages highlight that a "2025 Audi A5 tire pressure warning" is often part of a larger diagnostic picture, requiring a thorough investigation beyond just the tires themselves.

Important Warnings for Technicians and Owners

This Technical Service Bulletin includes a critical notice for vehicles that are still within their new model launch repair authorization period. For these specific vehicles, workshops are explicitly instructed to create a case with the Technical Assistance Center (TAC) to obtain repair authorization. It is paramount that TSB 2077226/3 is referenced in the very first line of the TAC case when initiating this process. This ensures proper tracking and authorization for repairs on newly launched models.

Diagnosis and Repair Procedure Summary

The primary objective of TSB 2077226/3 is to assist technicians in accurately identifying and resolving the root causes behind "loose wheel warning" or "tire pressure warning" messages. While not every step detailed below may be necessary for every complaint, these points provide a comprehensive framework for effective diagnosis and repair:

1. Software Updates: Technicians should begin by ensuring that the vehicle's software is updated to the absolute latest version available. This often involves performing any outstanding campaigns or other relevant TSBs that might address software-related glitches impacting warning systems.
2. Diagnostic Trouble Code (DTC) Checks: A thorough scan for diagnostic trouble codes (DTCs) is essential. Technicians are advised to check specific control unit addresses, including 812C, 0003, and 0065, if these addresses are present in the vehicle's configuration. Relevant DTCs found here can pinpoint the exact system or component experiencing a fault.
3. Wheel System Adjustments: If DTCs are logged that indicate issues with individual wheels or all four wheels, performing wheel balancing or swapping wheels over may prove beneficial. This can help rule out or correct physical imbalances or installation errors that could trigger sensor warnings.
4. Speed Sensor and Sensor Ring Inspection: It is crucial to meticulously inspect the speed sensors and their corresponding sensor rings for the affected wheel. These components must be clean and functioning correctly, as any contamination or damage can lead to erroneous readings and trigger a "2025 Audi A5 tire pressure warning" or "loose wheel warning."
5. Guided Fault Finding for System Availability: Should there be problems with the overall availability or functionality of the warning system itself, any underlying issues within the vehicle should be corrected by following Audi's Guided Fault Finding procedures. This systematic approach helps in isolating complex electrical or communication faults.
6. Control Unit Functionality Verification: Technicians must always confirm that control unit addresses 812C and 0003 are operating correctly. These control units play a vital role in processing sensor data and managing warning displays.
7. Cross-Referencing with Other TSBs: For a complete diagnosis, technicians are also instructed to check for DTCs in other control units and to consult further TSB 2078345. This additional bulletin may provide insights into other potential causes for the "loose wheel warning" or various instrument cluster messages, especially those stemming from interconnected systems.

It is paramount to understand that messages like the "loose wheel warning" and "tire pressure warning" are frequently symptoms of other underlying vehicle issues. Therefore, the primary cause of the problem must be accurately identified and rectified first to ensure a permanent and effective solution, rather than just clearing the warning message temporarily.

What Owners Should Do

If you own a 2025 Audi A5, Q5, S5, or SQ5 and experience a "tire pressure warning," "loose wheel warning," or any of the related malfunction messages described in TSB 2077226/3, it is recommended to schedule a service appointment with an authorized Audi dealership. Provide them with the exact warning messages you are seeing. While this TSB is primarily for technicians, understanding its contents can help you communicate effectively with your service advisor. Be aware that this TSB is informational and does not guarantee warranty coverage for repairs.

Warranty Information

Audi explicitly states that Technical Service Bulletin 2077226/3 is provided for informational purposes only. It is not applicable to any Audi Warranty claims. Owners should consult their authorized Audi dealership directly to discuss specific warranty coverage details related to any necessary diagnostic work or repairs stemming from these warning messages.

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Source: NHTSA ID 11021460