2021 Audi e-tron / Q3 / Q8 Sunroof Water Leak TSB 2056944

Owners of 2021 Audi e-tron, Q3, and Q8 vehicles may experience water dripping from the headliner area, indicating a sunroof water leak. Audi has issued Technical Service Bulletin (TSB) 2056944/5 to provide detailed instructions for diagnosing and repairing this issue. This TSB supersedes a previous bulletin, 20-44, reflecting updated service and warranty procedures.

This bulletin aims to help technicians identify the root cause of the water intrusion and implement effective solutions, preventing unnecessary part replacements. If you are experiencing an Audi e-tron sunroof water leak, this information will help you understand the potential causes and remedies.

Symptoms

The primary symptom addressed by TSB 2056944/5 is a visible water drip from the vehicle's headliner area. This water intrusion can occur when the vehicle is exposed to rain, a car wash, or even standing water on the roof. The water may leak into the cabin if the sunroof's normal drainage channels are breached. In some cases, the water drip may not appear until after driving, as water slowly migrates along the wind deflector hinge arms.

Fault codes / DTCs

This Technical Service Bulletin does not mention any specific diagnostic trouble codes (DTCs) associated with the sunroof water leak. The issue is typically identified by the physical symptom of water dripping into the cabin.

What the service bulletin says

Technical Service Bulletin 2056944/5 outlines several potential causes for water entry into the cabin from the sunroof area and provides corresponding repair instructions. The bulletin emphasizes inspecting and correcting issues with four main components:

• Sunroof Drain Hoses and Outlet Valves: Technicians should visually inspect all four sunroof drain hoses and valves for any damage or obstruction. Any pinched or blocked hoses or valves must be replaced to ensure proper water flow.
• Roof Opening Seal: The entire perimeter of the roof opening seal needs to be inspected. If any detachment, malformation, or damage is found, the roof opening seal should be replaced.
• Glass Sunroof Panels: The adjustment of the sunroof glass panels should be checked. If poor adjustment is identified after dimensional measurements, the glass panels must be adjusted to the correct specifications.
• Sunroof Frame and Wind Deflector: If water appears to enter through the sunroof frame, technicians must first check for damage like cracks or holes in the drainage structure. If no structural damage is found, further modifications are required. This includes cleaning the sunroof frame, applying butyl adhesive/sealing cord (part number AKL 450 005 05) to fill grooves, and bonding small packing pads (part number 251 201 525) to the front corners of the sunroof glass panel's 'skirt' to create a gap and prevent water contact with the sunroof mechanism. Additionally, a redesigned wind deflector (part number 4M8 877 651) with specific tabs is available to enhance water flow and drainage.

The TSB also specifies service numbers for warranty claims, including 6048 for drain hoses, 6042 for the roof opening seal, and 6039 for glass panel adjustments and sunroof frame modifications. The damage code for this issue is 0050.

What to do

If you own a 2021 Audi e-tron, Q3, or Q8 and notice water dripping from your headliner, it is recommended to contact an authorized Audi service center. Inform them about the Audi e-tron sunroof water leak and reference Technical Service Bulletin 2056944/5. The dealership technicians are equipped to perform the necessary inspections and repairs as outlined in the bulletin, ensuring your vehicle's sunroof system functions correctly and prevents further water intrusion.

NHTSA ID: 10182485