2021 Audi Q7 engine problems

Filed Sep 15, 2026 · Engine, Fuel system · OK

I have heard a knocking and experienced sudden loss of power while driving- not electrical loss, but vehicle suddenly slows down and unable to pick back up speed effectively creating a safety concern when driving- especially at on ramps. A warning light comes on and then it will go off randomly with the loss of power. I have taken it in multiple times and was told it is an emissions issue and a vacuum hose issue that allows fluid to get into my turbos or something along those lines. I have both been told by my Audi service advisor and done my own research and seen there have been issues with previous years and ultimately a recall was done to fix those- My vehicle is the 1st year following previous recalls. I have been told by the service professionals that they are at a loss whey a recall has not been issued on this issue again. That it is not only an environmental concern, but a huge safety concern. I have contacted Audi America twice now regarding this and ZERO has happened.

Filed Sep 8, 2026 · Engine · AL

Water pump failure causing coolant to leak into engine.

Filed Aug 11, 2026 · Engine · NY

waterpump is leaking- known issue that is currently being investigated for class action lawsuit. My car is now out of warranty.

Filed Jun 27, 2026 · Brakes, Electrical · WA

My independent repair shop has just diagnosed a coolant leak weeping from the vacuum line connection at the water pump; they referred to this problem as “coolant migration”. As documented extensively by Audi in Technical Service Bulletin 19-23-45 (2070349/2), this indicates an internal seal failure of the water pump, causing pressurized engine coolant to migrate directly into the vehicle’s vacuum system. While I understand that my vehicle is technically past its 4-year factory warranty timeline, a mechanical failure of this nature at just 43,000 miles is highly premature and points to a known manufacturer design defect rather than standard wear and tear. More importantly, this defect poses an immediate, severe safety risk. Because the vacuum system directly services the power brake booster, the migration of coolant into these lines risks catastrophic contamination of the braking system. This results in a stiff brake pedal and compromised vehicle stopping ability. I am deeply concerned about operating this vehicle with an active, manufacturer-acknowledged safety hazard affecting my brakes. At this time, I have not had this problem confirmed by the dealer, but plan to in the next week. The vehicle it available for inspection upon request.

Filed May 20, 2026 · Engine · 60,000 miles · NC

The contact owns a 2021 Audi Q7. The contact stated that while driving approximately 50 - 55 MPH, the Check Engine light had illuminated. The vehicle was taken to the dealer, who diagnosed code PO299, which referred to coolant migration into the vacuum system. The contact was unable to provide the exact parts that were needed for repairs. The vehicle was not repaired. The manufacturer was informed of the failure. The manufacturer opened a case regarding the issue. The failure mileage was approximately 60,000.

Filed May 15, 2026 · Engine · WA

Early fuel pump failure at 55k miles. Coolant is now leaking and the fuel pump and vac system need replacement.

Filed Dec 15, 2025 · Engine · GA

- Engine water pump failure and coolant intrusion into the vacuum system. Parts were replaced on 5 Nov 2025 and possible still at the dealer's location. - The defect poses the following safety risks: It resulted in contamination of vacuum lines; potential for sudden engine stalling or loss of power while driving; potential for catastrophic damage to engine-management systems dependent on vacuum integrity; potential for damage to emissions and combustion-control systems; potential for reduced braking system performance if vacuum supply is compromised, expensive and unexpected component failures, and possible recurrence since the cause appears related to design rather than normal wear. Any failure can create cascading hazards affecting safety-critical functions. - The problem was confirmed by an authorized Audi dealer. Dealer name and contact info can be provided upon request. - I do not know if the dealer delivered the involved parts to the manufacturer or insurance representative for inspection. Police or others did not inspect it. - There were no warning lights, messages, or other symptoms of the problem prior to the failure. It was identified by the Audi technician on 5 November 2025 while the vehicle was in the dealer for other services. The failure occurred at 47,855 miles which is far below the average lifespan of a water pump or vacuum system.

Filed Nov 13, 2025 · Engine · FL

My water pump went out on my 2021Q7. The car had 57271 miles on it. I looked up the Vin and it is not covered in the class action lawsuit however, my model and my year comes up but not my Vin. I feel a water pump should last until 100,000 miles.

Filed Sep 25, 2025 · Engine · GA

During a routine service on my 2021 Audi Q7, the shop found the coolant level low and traced it to a leak. The Audi dealer later diagnosed failure of the water pump, thermostat, valves, and related parts, with a repair estimate of nearly $5,000. I discovered that prior model years (up to 2020) were included in a class action lawsuit for the same type of cooling system failures, though my VIN is not covered. This appears to be the same issue, happening just a few months outside of warranty, and raises concerns about premature failure and safety risk from overheating.

Filed Aug 30, 2025 · Engine · FL

El carro fue comprado en febrero 2024 en greenway ford inclui un paquete de cambio de aceite,rotacion de llantas y cambio de los limpiabrisas.esto ha sido un dolor de cabeza. cada vez que se le realiza el servicio sale con la luz del ingenier prendido, en la computadora de auto zone aparece TURBOCHARGER INTERCOOLER(P0299). Ademas El asiento del pasajero esta siempre muy caliente el carro gasta demasiada gasolina y esta perdiendo velocidad,en verdad no se si el carro esta gastando aceite, ya que recién cambiado el sistema me mostro falta de aceite .o el consecionario no cambio el aceite correctamente..