2018 Audi Q5 electrical system problems

“The sunroof drainage system on my 2018 Audi Q5 failed to properly channel water away from the vehicle, resulting in significant water intrusion and approximately $6,000 in damage. The problem was confirmed by an authorized Audi dealership after the vehicle was brought in for inspection in August 2026. I am concerned that this represents a design or engineering defect in the sunroof drainage system rather than ordinary wear. A drainage system intended to remove water should not allow water to enter areas of the vehicle where it can damage electrical components or other systems. Water intrusion into these areas could potentially create electrical failures or other safety-related problems. The vehicle was inspected by an authorized Audi dealer, and Audi of America was contacted regarding the issue. Audi declined to cover the repairs. There were no clear warning lights or messages alerting me that the drainage system was failing before the water intrusion and resulting damage were discovered. The vehicle and affected components can be made available for inspection if necessary. I am submitting this complaint because I believe NHTSA should investigate whether…”

“I have a 2018 Audi Q5, VIN [XXX]. I am reporting a water intrusion/electrical defect involving the rear trunk area and the Comfort Control Module. My vehicle is within the model range affected by the water-intrusion recall 90S9. I want Audi to investigate whether the water intrusion that damaged my vehicle is related to the recall or a known manufacturing defect, and I am requesting that Audi cover the inspection, repair, and related expenses.It is unsafe driving the car as it is, and I can't afford the repairs. Audi dealer-hip in Alentown Pa diagnosis the car and found the problem.”

“Multiple electrical failures that control numerous safety systems, such as airbags, Collision avoidance, speed control, etc. Airbags will not activate in a collision. Vehicle will shut off at highway speeds, resulting in loss of steering control. The vehicle has been inspected by an Audi dealer. Multiple warnings on dash came on when the issue occurred.”

“Incident Description: While accelerating from a red light during rush hour, the vehicle suffered a sudden, catastrophic loss of steering control. The steering wheel locked completely and could not be turned. Simultaneous loud, long beeping and dashboard warnings appeared, stating: "Steering malfunction stop the vehicle immediately." The vehicle was immobilized in the middle of a highly congested, complex 5x5 intersection. Local police had to shut down traffic until the vehicle could be cleared. Safety Risk: Stalling abruptly in a major intersection during rush hour created an immediate risk of a multi-car rear-end pile-up. This jeopardized the safety of the driver and multiple children who were inside the vehicle, who faced a severe personal injury risk whether they remained trapped in the active roadway or attempted to exit. Diagnosis, Cost, and Recall Context: The vehicle was towed to an authorized dealership. Diagnosis revealed significant water intrusion inside the steering wheel wiring harness. Draining the water cleared the error and the vehicle become operational, but the dealership quoted $6,000 in repairs to replace the steering components completely…”

“Description of Incident and Safety Defect:Failed Component & Inspection Availability: The gateway control module, located in an unsealed floor compartment under the rear seat, failed due to liquid/moisture intrusion. The damaged module and vehicle are fully available for inspection upon request.Safety Risk: The sudden short-circuit of this module forced the vehicle into an immediate emergency "limp mode" and partial drivetrain shutdown while actively driving on the road. Unexpectedly losing engine power and throttle responsiveness in active traffic put my safety and the safety of surrounding drivers at an immediate, severe risk of a collision.Dealer / Independent Confirmation: The failure has been officially confirmed by an authorized Audi dealership service center. However, the dealer refused to perform a free safety repair because Audi has excluded my specific VIN from the active recall list.Prior Inspections: Outside of the diagnosing Audi dealership service center, the vehicle and failed component have not yet been inspected by the manufacturer, police, or insurance representatives.Warning Lamps & Prior Symptoms: Immediately prior to the drivetrain failure,…”

“XXX My wife drive her 2018 audi q5 2.0 on express way with mother([XXX]),the car suddenly stall and lost all power ,because car bcm2 module has suffered liquid damage due to known vehicle design defect, towing to nearest repair shop change new bcm2 module and fix wire spend near $4000.00 dollars .”