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

Owners of 2021 Audi e-tron, Q3, and Q8 models may experience an Audi e-tron sunroof water leak or water dripping from the headliner. Audi has released Technical Service Bulletin (TSB) 2056944/3 to provide guidance on diagnosing and repairing this issue. This bulletin supersedes an earlier version, TSB 20-39, and details the various potential causes and the necessary steps for resolution.

Symptoms

The primary symptom of this issue is a water drip from the headliner area, typically near the sunroof. This Audi e-tron sunroof water leak can occur when the vehicle is exposed to water, such as during rain or a car wash, or even after driving. Water may migrate along the wind deflector hinge arms and into the headliner, eventually dripping into the cabin.

Fault codes / DTCs

This Technical Service Bulletin does not mention any specific Diagnostic Trouble Codes (DTCs) related to the sunroof water leak. The issue is mechanical and related to water intrusion, rather than an electronic fault that would trigger a DTC.

What the service bulletin says

Audi's TSB 2056944/3 outlines several potential root causes for water entry into the cabin from the sunroof area. These include damaged or obstructed sunroof drain hoses or outlet valves, detached or malformed roof opening seals, and poorly adjusted glass sunroof panels. The bulletin also notes that water can sometimes bypass normal drainage channels, especially if the sunroof is opened or vented while the vehicle is wet.

The repair procedure involves a thorough inspection of these components. Technicians are instructed to ensure that sunroof frame drainage areas flow freely, replacing any pinched or obstructed drain hoses (Service Number 6048) or valves. If the roof opening seal is found to be detached, malformed, or damaged, it must be replaced (Service Number 6042). For issues with glass sunroof panels, adjustments may be necessary (Service Number 6039).

Additionally, the TSB describes a modification to the sunroof frame and glass panel. This involves cleaning specific areas of the sunroof frame using an all-purpose cleaner (D 00940104) and a primer applicator (D 00950025), followed by the application of Butyl adhesive/sealing cord (AKL 450 005 05). The glass panel 'skirt' also receives a bonding agent (D 355205A2) and packing pads (251 201 525), which are then pressed into place with a roller tool (3356) to enhance adhesion. The damage code associated with this repair is 0050, and sunroof frame modifications are covered under labor operation 6039 9999.

What to do

If you own a 2021 Audi e-tron, Q3, or Q8 and are experiencing a water drip from your headliner or any signs of an Audi e-tron sunroof water leak, it is recommended to contact your authorized Audi service center. Describe the symptoms you are observing, and mention that you are aware of TSB 2056944/3. A qualified technician will be able to diagnose the exact cause of the water intrusion and perform the necessary repairs as outlined in the service bulletin.

NHTSA ID: 10175957