2018 Audi Q5: water leaks into the cabin

Filed Jul 17, 2026 · Electrical, Engine · WI

My 2018 Audi Q5 experienced significant water intrusion due to a failure of the panoramic sunroof drain system. Water entered the vehicle interior and traveled down into the electrical compartment, submerging the comfort module and damaging multiple wiring harnesses. This caused the vehicle to become inoperable and unable to start. Audi has issued Technical Service Bulletin 2075969/2 describing this exact defect. The bulletin states that the sunroof drain hoses can be kinked during factory installation of the headliner, which blocks drainage and causes water to enter the vehicle. This is a manufacturing defect affecting multiple model years of the Audi Q5. In my case, the water intrusion caused electrical failure, loss of vehicle function, and required thousands of dollars in repairs. Audi declined to cover the defect and stated the vehicle was not maintained on schedule, even though maintenance has no relationship to kinked or improperly routed sunroof drains. This defect poses a safety risk because water intrusion into electrical components can cause sudden vehicle failure, electrical shorts, corrosion, and loss of critical systems. The failure occurred without warning. I am reporting this because the issue appears to be widespread, documented by Audi, and has the potential to disable vehicles unexpectedly.

Filed Sep 11, 2024 · Electrical, Engine · MI

The comfort control module in the trunk of the car was sitting in water due to an ingress of water coming in the car. The car would not start due to this water ingress and could have shut off completely on the freeway or while driving. This caused my car to completely shut off and malfunction. There were no warning lamps or messages of the problem. I found out about the problem by taking the car to the Audi dealership. They originally thought the problem was the gateway module which has already been recalled due to the same problem of an ingress of water. The Audi dealership has claimed that the ingress of water is from a clogged drain pipe in the sunroof. They said there is nothing you can do to prevent this from happening.

Filed Jul 18, 2024 · Acceleration, Electrical · WI

Car was left outside for two weeks while we were gone on a trip. When we returned and attempted to start the car numerous warning lights went off related to turn signals, tail lights, engine ignition, key recognition, etc. We were able to drive the car home but the turn signals and tail lights were malfunctioning and the engine would lose power unexpectedly. Upon researching on AudiWorld Forums I came to learn I should check to see if there was any moisture in certain areas, including the rear fuse box area at the rear of the car. I checked that location and found many inches of water in the fusebox!!! I learned that MANY, MANY people with q5s have had the same problem which is RAINWATER ENTERING THE VEHICLES ELECTRICAL SYSTEM DUE TO NON-OPERABLE SUNROOF DRAIN PORTS. Yes, I searched and found an unrelated recall 90s9 but the dealer said this was not the issue, the issue is non-operable sunroof drains and the repair cost is $8,000. Having no idea of the danger I was placing my family in by driving this vehicle while its electrical system was swamped with water, I feel a class action lawsuit should be brought against the company for damages for material, labor, as well as the risk of injury or death I placed my wife and I in by driving this vehicle under such unsafe conditions. I noted there was a suit settled for this issue with other models, but not the 2018 q5. [XXX] V Audi/Volkswagon [XXX] . The idea that someone should have to face death for leaving their car in the rain does not even pass the laugh test. Someone in Audi's risk management department needs to address this and make owners whole again. Please advise. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 14, 2024 · Body, Electrical · 190,000 miles · OH

The contact owns a 2018 Audi Q5. The contact stated the vehicle was parked during a rainstorm and the contact attempted to start the vehicle, but the vehicle failed to start. The vehicle was taken to the dealer who performed a diagnostic test and stated that water entered the vehicle through a fractured seal causing the electrical wiring to get wet. The vehicle was not repaired due to the cost. The contact referenced the federal safety agency Campaign Number: 21V947000 (Electrical System, Structure) as a possible solution to the failure however, the VIN was not included in the recall. The manufacturer was notified of the failure. The failure mileage was approximately 190,000.

Filed Sep 7, 2023 · Electrical · NY

Warning lights on the dash began to light up about a minute after starting and driving the car. Pulled over, stopped the car and tried to restart but couldn't restart. Apparently water leaked in from the closed sunroof over night and flooded the spare tire well where a control module is located and shorted. Car was serviced by Audi as recommended during the entire time. Had to have the car towed to an Audi dealer and was charged $1,600 to correct after 10 days.

Filed Aug 16, 2023 · Electrical · FL

The comfort control module catastrophically failed. There is video evidence of the condition the module is in. The whole car shut down. Nothing electronic worked. Doors unlocked, trunk opened, gas cap unlocked, couldn't start car or change gears, roll up/down windows, or lock the doors. The dealership has confirmed the sunroof drains leaked water into the rear left wheel well filling it up with water into the trunk where the spare wheel well is with picture evidence of the amount of water. It rained the night prior. There were no prior warning signs or any issues. Everything was working fine until it was not. The comfort control module needs to be completely rewired and the sunroof drains need to be completely replaces. If this happened while I was driving I would have lost complete control of the vehicle as all power to the car was off.

Filed Jul 25, 2023 · Body, Electrical · VA

In early July, 2023 various warning and fault lights began to show on the dashboard: engine start system, brake lights, start/stop system, and others - indicating malfunctions with systems important to safety. Also, the car alarm system sounded without cause and key pods would not lock/unlock the doors electronically. These warning lights proliferated over several days. We took our car into our local Audi dealership. They diagnosed the problem as follows: "Performed GFF and found code for 3393 comfort system control module replacement. Control module faulty due to control unit being submerged in water and fried the control unit. Water leak due to rear drains clogged causing the water to overflow. Performed/fixed the water leak, cleaned out the pools of water that have accumulated, replaced the control unit 3393 comfort system control module, performed control unit replacement test plan and program keys." The Audi Q5 is well known to have design/parts problems in the sunroof drainage system. As has occurred in thousands of other Q5s, those issues caused the rear cargo area to flood, frying an important electronic component and activating warning/fault lights for a range of other systems. Malfunctions in several of those systems could have caused critical safety issues. We are fortunate because we decided to take our Audi directly to the dealership service center. Repairs cost several thousand dollars.

Filed Nov 11, 2021 · Body · CA

Panoramic sunroof leaked water into the car's electrical system during a rainstorm (despite being closed tight), resulting in a total failure of the car's electrical system, potentially a catastrophic occurrence. Fortunately the electrical failure happened when the car was stationary.