Gateway control module failure from water ingress
ELECTRICAL SYSTEM
22 NHTSA complaints · 2021-01 → 2026-10
“Driver was with 2 passengers (3 young females) driving in a new 2021 Audi Q5 (less than 5 months old and less than 6000 miles) at about 70 mph on Garden State Parkway in NJ. A brake malfunction warning light appeared on the dashboard and within 5 seconds the car completely shut”
“Q5 HAS A VERY SERIOUS DEFECT, THAT IS, THERE IS A GATEWAY MODULE LOCATED UNDER THE REAR SEAT CUSHION/CUP HOLDER. ALL OF THE COMMUNICATIONS TO ALL THE CONTROLLERS GO THROUGH THIS LITTLE BOX. IF WATER SPILLS, IT COLLECTS AROUND THE GATEWAY AND CORRODES IT, WHICH WILL SHUT DOWN THE…”
“The Gateway control module failed in September 2025 on my 2021 Audi Q5. Vehicle error messages included the following failures: Cruise control, Parking brake, transmission, brakes, and steering, windows rolled down, seats moved, dash and MMI black followed by a sudden loss of”