Multiple P029900 codes and check engine lights, coolant loss, coolant leaking and burning smell, loss of power. On the most recent trip to the dealership this problem was diagnosed, and the invoice states recommend replacing vacuum lines, actuators and all affected parts. The dealership will not send in the warranty claim stating there's not enough evidence. This is a known issue with leaking water pumps and coolant ingress into the vacuum system. Why are we still waiting for a recall on these issues? I am the 3rd to report this but would bet the affected number is 1,000 times higher.
No injuries · No fire · No crash
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.
No injuries · No fire · No crash
Two separate compounding defects. The first and most critical - on many occasions the lane keeping system in my SQ7 has unexpectedly and aggressively engaged and attempted to steer the vehicle into barriers, other vehicles and construction workers. This occurs despite positive driver steering input, normal driving (cruise control off), and creates a condition where I must “fight the wheel” to keep the vehicle from causing an accident. This problem is consistent and repeatable. Most often this has happened in two scenarios (1) in normal driving where lane markings are faded or ambiguous, and (2) where construction is occurring and the vehicle must be driven in accordance with temporary markings or instructions. As a workaround, the vehicle has a feature to turn the lane keeping system off. Due to a second critical defect, even if you have turned the system off, at random the lane keeping system turns itself back on. As a driver, you never truly know what the car is going to do. Audi recognizes this second defect in its internal Technical Service Bulletin (TSB) 90 24 88 2073280 of 1 May 16, 2024 and describes the issue as "Lane departure warning sporadically activates by itself". Instructions from Audi to dealers in this TSB are as follows: No repair is currently available. 1. Do not perform any repairs. Any repairs for this concern may be denied. 2. Instruct the customer that this condition is normal. I have engaged Audi's customer service on these issues. At their request, I have taken my SQ7 to two different area dealerships for evaluation. Both confirm that lane keeping is unpredictable and a frequent area of trouble - despite there being nothing "broken" that they can repair. My vehicle has been out of service since 2/9/2026 - 98 days as of the date of this report. This combination of safety defects creates a truly random and unpredictable driving experience that is unsafe for everyone involved.
No injuries · No fire · No crash
USB-C ports found on the front center console and second row center console have a defective design that leads to frequent "push in" of the USB connector. This is leading to shorts, circuit boards overheating, and potential fire risk. It is a frequent issue reported in online forums affecting a wide range of Audi models that include the SQ7 and Q7 among many others. Dealers and Audi of America are infrequently taking responsibility for the poor design and are suggesting repair fees in the 1000s of dollars. One of the USB-C ports in my center console was pushed in before I purchased it, and the dealer is unwilling to help repair it. Their initial quote was $3000 to repair this defectively designed part.
No injuries · No fire · No crash
My vehicle is a 2022 Audi SQ7. On Feb 4th 2026 at 22,100 miles dealer determined that the water pump is leaking and quoted ~$4400 for replacement. Stating that my warranty expired less than 2 month ago on Dec 6th 2025. After reading multiple online resources it looks like it's a very common problem on this vehicle but it was not included in a settlement(Civil Action No. 2:21-cv-11251-MCA-MF) for some reason. I wanted to file this complaint so nhtsa could look into the water pump issue with 4.0 engines EA825 from Audi
No injuries · No fire · No crash