2018 Audi Q5 Exterior lighting Problems

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.

NHTSA ID

11751123

Incident

Jul 7, 2026

On 06/13/24, milage 61023, I experienced a failure in Left Tail Light. There was no damage to the housing unit, ie a crack in the lighting unit, but I was advised that the entire housing unit needed to be replaced as there was water in the housing unit that corroded the light socket for the led light. The repair was $470.00 for parts and $100 in labor subtotal $570.00 before tax and a dealer discount of $57. 03 total $541.51. I was shocked that it was over $500 to replace a brake light. Then 09/12/24, milage 63515, (3) months and 2,492 miles later I experienced a failure in the Right Tail Light. Again, there was no damage to the housing unit and I was advised that the entire housing unit needed to be replaced as there was water in the housing unit that corroded the light socket for the led light. This repair was provided to me with a dealer discount to the price after tax $481.59. When I asked if this was a recall item I was told no it is not. I asked if there was after-market replacement part as this seems to be a product defect I was told no there are no after-market parts available. I was told that these parts are kept in stock as this is a know issue for all Audi's with the tail brake lights close to the bumper. This is a safety issue as you can not drive the car with a defective brake light. I called Audi USA and reported my complaint and asked for some compensation but more importantly wanted to document this safety issue and after review was offered $200 off future repairs at my local dealer. This is safety issue and there is no reason to pay $1,023.10 for required brake lights repair due to housing unit that does not keep moisture out.

NHTSA ID

11615892

Incident

Jun 13, 2024

The panel showed vehicle lights malfunction. The side marker lights are on all the time. This happened without any accident or changes of the setting.

NHTSA ID

11611311

Incident

Aug 27, 2024

Suddenly car entry stopped working. Warning messages on display about start/stop, engine starting malfunction, every single light. I found the driver rear side full of water where the fuse panel and control modules are located. There was water soaked into the insulation at the bottom of the space as well as the insulation over the wheel well. Water drops were viewed on the controllers in that space.

NHTSA ID

11552232

Incident

Oct 14, 2023

Comfort Control Module (J393) is malfunctioning due to water getting into the wiring components and surrounding areas. The rear lighting stops working all together; No taillights, no brake lights, no turn signals, no license plate lights, and no lights when backing up. The problem has been reproduced by an authorized dealer. The component was removed by the dealer and noted of water inside the module and corrosion on the pins/ internals because of the water. The warning lamps occurred at the same time the lights stopped working. There was never any "prior to" warning. The warnings disappear randomly, no set time until they cleared. I am assuming once the module dries out over time is when the warnings start to clear but that is just speculation. UNKNOWN cause of the incident, but water is getting into the inside of the car somehow.

NHTSA ID

11546356

Incident

Sep 25, 2023

Start/ Stop system malfunction shown on dash board. Took vehicle to Lynbrook Audi New York on 9/20/23. Water penetration causing multiple damage to electrical systems. Audi states water possibly entering through faulty skylight drain hose ? Quote service charge of 12,028.00 not including tax , declined service for a second opinion. Invoice # 207805. Paid 271.57 for diagnostic inspection. Vehicle was service at this location on 3/9/22 RO # 188998 Tag w107 Complete Complimentary Inspection on 3/9/22. Vehicle Certified ( pre-owned ) at this location on 12/20/2020 ( paid over 1,000.00)

NHTSA ID

11546309

Incident

Sep 20, 2023

Control modules located next to the gateway module that was recently recalled are getting wet and shorting out. Tail lights, brake lights, turning signals, license plate lights, and reverse lights all stop working. Once the area is dry, the lighting works only sometimes. I am not ever sure if the lights work or not while I'm driving and am concerned about getting rear-ended because of the lights being out and me not knowing.

NHTSA ID

11546126

Incident

Sep 21, 2023

As I was driving on the freeway on my way home from work, my car just started giving off warning signals That my brake lights were no longer working and my tail lights were no longer working. Which almost caused a serious accident Due to the car behind me not being able to tell that I was coming to a stop. When I got home I did a little research to see if I can see what the problem was and I come across multiple complaints online about a faulty hatch switch. I took my car into the dealer the next morning for service and the service provider told me that they will have to check my car and more than likely it is the hatch switch and they are aware of it. But Audi doesn't have a recall for something so deadly. faulty hatch switch That controls your brake lights and taillights It's a serious safety concern And should be addressed immediately, people can lose their lives all because of a faulty switch that audi is aware of

NHTSA ID

11544755

Incident

Sep 14, 2023

Audi engine start system malfunction continues to go off on the dash and the majority of the exterior lighting has gone into a malfunction as well. The left rear fuse panel in the luggage compartment has moisture in it and on the wires.

NHTSA ID

11541835

Incident

Aug 30, 2023

Passenger backup light failure. Taken to dealer and they recommended replacing part TSB 2063766/2. Yes I will supply this part if requested. No backup light is a safety hazard. Yes the vehicle was inspected by the dealer. They gave a parts and labor estimate of $805. Yes there was a warning message in the dashboard for this malfunction. This is a “common failure” in Audi Q5 automobiles to the point where the replacement part is on back order.

NHTSA ID

11540560

Incident

Jul 18, 2023

AS I WAS PREPARING TO PARK AT MY LOCAL GROCERY STORE IN AN ASSIGNED SPACE I EXPERIENCED A SUDDEN UNINTENDED ACCELERATION. THE FRONT END SLAMMED INTO A CONCRETE RETAINING WALL, CAUSING MAJOR DAMAGE TO BOTH MY VEHICLE AND THE RETAINING WALL. THE CAR WAS PRACTICALLY AT A COMPLETE STOP WHEN THIS OCCURRED. ADDITIONALLY WHEN I REVERSED THE CAR IT ACCELERATED BACK AT A RAPID SPEED. IT WAS VERY SCARY AND THANKFULLY NOBODY WAS INJURED OR WORSE. THIS COULD HAVE BEEN A SERIOUS OR FATAL SITUATION AND I FEEL THAT THERE WAS SOME KIND OF ELECTRONIC FAILURE. CONSIDERING THE SAFETY RECORD ON THIS CAR I FELT VERY UNSAFE AND NOT IN CONTROL.

NHTSA ID

11165262

Incident

Jan 3, 2019

Mileage

12,000 mi

HEY, IM CARMEN, IM GERMAN AND I M DIPLOMATIC, I WORK AT THE PERMANENT MISSION OF GERMANY FOR THE UNITED NATIONS TILL MARCH 2019. MY QUESTION IS, I WANT TO BRING A AUDI Q5 , BRAND NEW MODEL , A GERMAN MODEL, FROM GERMANY TO NEW YORK. AND AFTE MY JOB IN 2019, I WANT TO TAKE IT BACK TO GERMANY. IS THERE ANY PROBLEM?? MUST I CHANGE ANY STUFF BECAUSE OF OTHER SAFETY RULES OR SOMETHING? OTHER LIGHTS, MILES PER HOUR, ELECTRICITY?

NHTSA ID

11092612

Incident

May 9, 2018