2025-2026 Audi A3, S3, RS 3 Transmission Shift Issue TSB

Audi has issued Technical Service Bulletin (TSB) 2071692/6 to address a specific condition observed in certain 2022-2026 Audi Q4 e-tron, Q4 Sportback e-tron, 2025-2026 Audi A3, S3, RS 3, and 2025 Audi Q6 e-tron, Q6 Sportback e-tron, SQ6 e-tron, and SQ6 Sportback e-tron models. This bulletin clarifies why a vehicle might automatically shift from Drive (D) or Reverse (R) to Park (P), or prevent shifting out of Park initially. This behavior is not a malfunction but an intended safety feature of the vehicle's seat occupied recognition system.

The Audi S3 transmission shift issue is designed to prevent unintended vehicle movement when a driver is not properly detected or secured. This TSB provides important information for both technicians and owners regarding the system's operation and what actions should be taken, or avoided, when this condition occurs.

Symptoms

Owners may experience the following symptoms, as described in TSB 2071692/6:

• "The vehicle cannot be switched from transmission position "P" to transmission position "D" or "R""
• "The vehicle switches from transmission position "D" or "R" back to transmission position "P" automatically."

Workshop findings indicate that when these conditions occur, there is typically "No event memory entry is logged in the airbag control unit". This absence of a fault code suggests the behavior is a system response rather than a component failure.

Diagnosis / Trigger Conditions

This condition primarily occurs in situations where the seat occupied recognition system does not detect sufficient pressure from the driver, especially when the driver's seat belt is not fastened. For instance, very light drivers, or shifts in weight, can cause the sensor in the driver's seat foam to register insufficient pressure. When this happens, the vehicle's safety systems interpret it as the driver not being present or properly secured.

The system's logic prioritizes safety. If the driver is not wearing a seat belt and is not recognized due to low weight, the vehicle immediately switches back to transmission position "P" when "R" or "D" is selected. This prevents the vehicle from rolling away if the driver is not properly detected.

Technical Background

Modern Audi vehicles, including those affected by TSB 2071692/6, are equipped with a sophisticated "leaving concept" system. This system detects and authenticates the driver on the seat, enabling functions like activating the ignition by pressing the brake without needing to press the start/stop button (this applies specifically to e-tron models).

The ability to select transmission position "D" or "R" is determined by several factors: the seat occupied recognition, whether the seat belt is fastened, and if the driver's door is closed. The system is designed to ignore very light occupants or objects, such as children or bags on the driver's seat, to ensure that only a properly detected driver can operate the vehicle in drive or reverse. This design is crucial for the "leaving concept" to function safely and prevent unintended vehicle movement.

Important Warnings / What Owners Should Know

Audi's TSB 2071692/6 includes several critical advisories for owners and technicians to prevent unnecessary repairs and ensure safe operation:

• Do not replace parts unnecessarily: "Replacing the seat occupied sensor is not the solution to this complaint if no event memory entries clearly relating to the seat occupied sensor are present."
• Avoid unauthorized repairs: "There is no reason to replace parts or attempt repairs. Unjustified work/replacement parts will be charged back."
• Warranty limitations: "Invoicing under warranty is not permitted." and "This TSB is informational only and not applicable to any Audi Warranty."
• Driver responsibility: Audi explicitly states, "Please wear a seat belt when driving."
• System operation: "Selecting transmission position “D” or “R” is always possible when the driver is wearing their seat belt." This highlights that the Audi S3 transmission shift issue is mitigated by proper seat belt use.

Service Advice for Technicians

For technicians diagnosing this condition, Audi provides clear guidance. The seat belt recognition system takes precedence over the seat occupied recognition if the driver's seat belt is fastened. Therefore, technicians are advised to ensure the driver's door is always closed and the seat belt is always fastened when testing or driving the vehicle.

It is crucial not to replace the seat occupied sensor unless there are clear event memory entries in the airbag control unit specifically related to the sensor. The TSB emphasizes that any unjustified parts replacement or repair attempts will be charged back to the dealership, and such work cannot be invoiced under warranty.

Revision History

Audi Technical Service Bulletin 2071692/6 has undergone several revisions to update its content and scope:

• Revision 6 (Date: -): Revised header to include additional models and a revised Condition section with an updated model table.
• Revision 5 (Date: February 3, 2025): Modified the title, revised the header to add customer codes, and updated the Technical Background section.
• Revision 4 (Date: October 25, 2024): Modified the Technical Background section.

Additional Information

All part and service references mentioned in TSB 2071692/6 are subject to change or removal. Technicians and service personnel should always consult their Parts Department and/or ETKA for the most current information and bulletins. Furthermore, it is important to check the Repair Manual for any fasteners, bolts, nuts, and screws that require replacement during any repair process.

NHTSA ID: 2071692/6