2021 Audi Q8 Power Rear Lid Not Closing TSB 2064476/4

The 2021 Audi Q8 power rear lid not closing completely is a common concern for owners, often accompanied by specific warning messages and diagnostic trouble codes. Audi has issued Technical Service Bulletin (TSB) 55 24 95 2064476/4 to address these issues, providing guidance for diagnosis and repair. This bulletin, dated March 22, 2024, supersedes a previous bulletin, Group 55 number 24-91, from February 19, 2024, incorporating updated information regarding production solutions and warranty procedures.

Symptoms

Owners of affected 2021 Audi Q8, A7, Q3, Q5, S7, SQ5, SQ8, RS 6 Avant, RS 7, and A6 allroad models may experience one or more of the following symptoms related to the power rear lid:

• "The power rear lid does not close completely."
• "The rear lid lock does not engage in the secondary latching position."
• "The instrument cluster indicates that the rear lid is open."

These symptoms can lead to concerns about vehicle security and functionality.

Fault Codes / DTCs

When diagnosing the power rear lid issue, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the rear lid control module J605 (address word 006D):

Code	Description	Module
B113E29	Closing assistance Range/Performance	Rear lid control module J605
B12E015	Rear lid closing assist motor Open circuit/short circuit to B+	Rear lid control module J605

Diagnosis / Trigger Conditions

The TSB identifies several potential failure modes that can lead to the symptoms and DTCs, particularly for the 2021 Audi Q8 power rear lid not closing issue:

1. Internal Clutch Blockage: The internal clutch of the closing assist motor may become blocked due to a dimensional deviation in its components. This mechanical interference prevents the motor from operating correctly.
2. Solder Joint Short Circuit: An improper solder joint within the closing assist motor can cause a short circuit. This electrical fault is specifically noted as a potential cause for DTC B12E015 to be stored.
3. Detached Bowden Cable Clip: The Bowden cable clip, which is crucial for the proper operation of the closing assist mechanism, may detach from the closing assist motor housing. This detachment can disrupt the mechanical linkage required for the rear lid to close and latch correctly.

Technicians will use a VAS tester with the current version of ODIS (Windows 10) to read fault codes and perform diagnostic tests to pinpoint the exact cause.

Repair Procedure Summary

The primary repair procedure outlined in TSB 55 24 95 2064476/4 involves replacing the rear lid closing assist motor. This repair should be performed according to the detailed instructions provided in the Elsa Repair Manual. The process generally includes:

1. Accessing the rear lid closing assist motor.
2. Disconnecting electrical connectors and mechanical linkages, such as the Bowden cable.
3. Removing the faulty closing assist motor.
4. Installing a new, optimized closing assist motor.
5. Reconnecting all components and verifying proper operation of the rear lid.
6. Clearing any stored DTCs and performing a functional test.

Warranty Information

Audi provides specific warranty coverage for this repair:

• Standard Warranty: Up to 48 months or 50,000 miles, whichever comes first.
• Certified Pre-Owned (CPO) Vehicles: Covered under the G10 claim type, requiring verification of owner eligibility.
• Out-of-Warranty Vehicles: If the vehicle is outside any applicable warranty period, this Technical Service Bulletin is informational only, and repair costs would typically be the owner's responsibility.

The service number for this repair is 5584, with a damage code of 0010. Labor operations for "Closing assist motor remove & reinstall" are designated 5541 19XX, and diagnostic time (GFF) is 0150 0060, with a maximum of 30 Time Units (TU). No additional time is allowed for road tests before or after the service procedure. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Required Parts and Tools

To perform this repair, technicians will need specific parts and tools:

Required Parts

• 3V5827887C: Motor, liftgate
• 5TA827887C: Motor, liftgate (Q3)
• Fasteners, Bolts, Nuts, and Screws: As needed, per the Elsa Repair Manual (refer to ETKA for specific part numbers).

Required Tools

• VAS 6160 / VAS 6150: A VAS tester equipped with the current version of ODIS (Windows 10) is necessary for diagnosis and post-repair checks.

Important Warnings

Owners should be aware that if their vehicle is outside the specified warranty period (48 months or 50,000 miles, or CPO coverage), this Technical Service Bulletin serves as an informational guide only. In such cases, the cost of diagnosis and repair, including parts and labor for addressing the 2021 Audi Q8 power rear lid not closing, will typically not be covered by Audi. It is always recommended to consult with an authorized Audi service center to determine specific warranty eligibility.

NHTSA Citation

This information is based on Technical Service Bulletin 55 24 95 2064476/4, published by Audi of America, Inc., and filed with the National Highway Traffic Safety Administration (NHTSA) under ID 10252099.