I am reporting premature cooling system failure on my 2021 Audi SQ7 equipped with the 4.0L twin-turbo V8 (EA825 engine). The vehicle developed a coolant leak from the water pump and thermostat housing assembly at relatively low mileage (less than 27,000 miles). The failure caused coolant loss and low coolant warning messages, requiring major repair due to the engine’s integrated “hot-V” cooling system design. Research shows many similar reports involving Audi EA825 4.0T vehicles (SQ7, SQ8, RS6, RS7, etc.) experiencing water pump and thermostat leaks, along with multiple revised OEM part numbers and redesigned components. This defect creates a potential safety risk because sudden coolant loss can lead to overheating, limp mode, loss of power, or breakdown while driving. I request that NHTSA investigate whether these recurring cooling system failures on EA825 4.0T engines represent a broader defect trend. Thank you for your attention to this matter.
- NHTSA ID
- 11739537
- Incident
- Mar 27, 2026
Electrical
Filed Jan 21, 2026
The contact owns a 2021 Audi SQ7. The contact received notification of NHTSA Campaign Number: 25V201000 (Electrical System). The contact scheduled an appointment with a local dealer; however, the dealer advised the contact that the USB ports needed to be repaired to complete the recall repair. The contact had never used the ports and was unaware of the failure prior to the recall notification. The vehicle was not repaired. The manufacturer was informed of the failure and referred the contact back to the dealer for assistance. The failure mileage was approximately 46,000.
- NHTSA ID
- 11712409
- Incident
- Aug 21, 2025
- Mileage
- 46,000 mi
Electrical
Filed Apr 28, 2025
The contact owns a 2021 Audi SQ7. The contact stated that while driving at undisclosed speeds, the instrument cluster became inoperable. Additionally, the contact stated that the failure was intermittent. There were no warning lights illuminated. The contact received notification of NHTSA Campaign Number: 25V201000 (Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 44,540. Parts distribution disconnect.
- NHTSA ID
- 11657203
- Incident
- Mar 1, 2025
- Mileage
- 44,540 mi
Driver assistanceElectrical
Filed Apr 8, 2025
The presense and parking and lane change and rear warning lights go on. Have had the sensors changed and recalibrated. Been to dealership 3 times without a solution. Not sure if the system is functioning or not as is sporadic
- NHTSA ID
- 11653556
- Incident
- Feb 3, 2025
The car started over heating at 39,000 miles with the warning that “coolant temperature too high, let engine run with vehicle stationary.” Took it to the dealer for repairs and they said it’s a bad thermostat and water pump which requires the entire front end to be disassembled to change. Surprised that this occurred at only 39,000 miles. Luckily my car is under warranty a few more months.
- NHTSA ID
- 11574768
- Incident
- Feb 28, 2024
Driver assistance
Filed Oct 18, 2022
Sporadic failures of saftey systems by driver warning -Adaptive vehicle assistance Predictive regulation restricted -Audi adaptive light malfunction -Audi pre sense system malfunction -Adaptive vehicle assistance restricted This has happened since new and told by Audi no fix for months related to Audi solution number 2061489/4
- NHTSA ID
- 11489825
- Incident
- Jun 8, 2022
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.