2017-2026 Audi Q7/Q8 Rear Suspension Lowering Issue TSB

Audi has released Technical Service Bulletin (TSB) 2059841/6 to address concerns regarding the rear suspension lowering function in various Audi Q7, Q8, SQ7, SQ8, and RS Q8 models. Owners may experience the rear suspension lowering function becoming unavailable, often accompanied by specific diagnostic trouble codes (DTCs).

This TSB, released on October 22, 2025, provides important information for technicians and owners, clarifying the root cause of the issue and advising against unnecessary parts replacement. The TSB emphasizes that the problem is typically not due to a faulty component but rather an operational condition.

Symptoms of Rear Suspension Lowering Issues

Owners of affected Audi vehicles may notice that the rear suspension lowering function is sometimes not available. This can manifest in several ways, often described by customers and workshops using specific complaint types:

• Lowering Lock: The system may indicate a "chassis -> damping\suspension regulation -> lowering lock", meaning the lowering function is inhibited.
• Incorrect Operation Sequence: The system might report "functionality -> operation sequence incorrect" for the damping/suspension regulation or level control system.
• No Function: The level control system or the loaded level adjustment may show "functionality -> no function" or "functionality -> cannot be selected."
• Partially Out of Order: The level control system, including pitch and roll compensation, or the level adjustment switch, might be described as "functionality -> partially out of order."

These symptoms collectively point to an issue where the vehicle's rear suspension cannot be lowered as expected, impacting convenience and potentially vehicle utility.

Fault Codes / DTCs

When the rear suspension lowering function is unavailable, the suspension control unit (diagnostic address 0074) will typically log one or both of the following diagnostic trouble codes (DTCs):

Diagnostic Address	Diagnostic Trouble Code	Fault Symptom	Storage State
0074 - Chassis control	C11B515	Load level button, high open circuit/short circuit to B+	Intermittent/Static
0074 - Chassis control	C11B615	Load level button, low open circuit/short circuit to B+	Intermittent/Static

These DTCs indicate an electrical issue (open circuit or short circuit to B+) related to the load level button. The storage state can be either intermittent, meaning the fault occurred temporarily, or static, indicating a persistent issue.

Understanding the Issue

According to Audi's technical background for TSB 2059841/6, the rear suspension lowering function can become sporadically unavailable if the button for this function is pressed accidentally while the vehicle is in motion. This often happens when objects in the luggage compartment inadvertently press the button. This accidental activation while driving can trigger the system to log DTCs C11B515 or C11B615, leading to the function's temporary unavailability.

Figure 1 in the TSB illustrates the location of the controls for lowering the rear suspension, typically found in the trunk area, making it susceptible to accidental presses from cargo.

Important Warning: No Repair Needed

Audi explicitly states in TSB 2059841/6 that replacing the button for the lowering suspension function will not solve the issue. This is a critical piece of information for owners and technicians alike. The problem is not a faulty button but rather the conditions under which it is pressed. Therefore, attempting to replace the button would be an unnecessary expense and would not resolve the underlying cause of the sporadic unavailability of the Audi Q8 rear suspension lowering function.

Owner Action and What to Do

If you own a 2017-2026 Audi Q7, Q8, SQ7, SQ8, or RS Q8 and experience the rear suspension lowering function not working, it's important to understand the information provided in TSB 2059841/6. The primary recommendation is to be aware of the rear suspension lowering button's location, typically in the luggage compartment, and take precautions to prevent accidental presses while the vehicle is in motion. Ensure that cargo is secured and does not come into contact with the button.

If the issue persists or you are concerned about the diagnostic trouble codes, it is advisable to consult an authorized Audi service center. They can confirm the presence of DTCs C11B515 or C11B615 and explain the situation as outlined in the TSB. Remember, based on this bulletin, a button replacement is not the recommended solution.

TSB Revision History

Technical Service Bulletin 2059841/6 has undergone several revisions to update its information:

• Revision 6: Revised header to add model years, updated technical background, and revised service information.
• Revision 5 (January 12, 2024): Revised header to include revised model years.
• Revision 4 (June 1, 2023): Revised header to add model years.

These revisions ensure the TSB remains current with applicable vehicle models and the latest diagnostic information.

NHTSA ID: 11025364