Audi Q8 Engine Problems
65 owner complaints filed with NHTSA across 5 model years.
Complaints by Year
Worst year: 2019. Best year: 2025.
Owner Reports
A representative sample of complaints filed with NHTSA.
I own a 2019 Audi Q8 3.0 TFSI that has been regularly maintained and serviced through authorized Audi dealerships. The abnormal engine ticking/knocking did not suddenly begin at 91,000 miles. A similar noise could be heard earlier, but ...
At approximately 52,000 miles, on August 11,2026 (or earlier), my vehicle developed a coolant leak that was traced to a failed coolant shut off valve. The coolant shut-off valve failure allowed coolant to migrate into the vacuum harness,...
On July 4, 2026 in the early evening, I was driving in the HOV lane of the freeway when the engine abruptly lost power. There was a warning light that came onto the dashboard but I did not see what it said as I was solely concerned about...
I was driving my car would not accelerate on the highway and it almost caused me to get into an accident with my niece in the car. When I took the car to Audi this is what I was told my the service adviser. “Good afternoon. The technic...
I own a 2019 Audi Q8. The vehicle was in the dealership’s possession for approximately three (3) weeks for service. During that time, I was not informed of any significant mechanical concerns or issues. After retrieving the vehicle, i...
Piston slap issues. The manufacturer is aware of the engine failure issues. They extended the engine warranty coverage from 50k to 80k miles knowing that the engine piston slap is an extreme issue but they won’t issue a total and compl...
Catastrophic engine failure on Audi Q8 3.0L turbo. Per service manager it a know issue and Audi just sent out a letter extending engine warranty to 80,000 miles. Per Audiworld forum Audi is replacing some engines and charging some owners...
The contact owns a 2021 Audi Q8. The contact stated that while driving at various speeds, the instrument panel failed to operate. The contact stated that while driving 70 MPH, the failure recurred. The contact received notification of N...
The vehicle is a 2020 model with less than 55k miles and experienced coolant leaks. Specifically, the water pump was faulty and leaked causing coolant liquid to leak in additional lines and gaskets. The repairs resulted into costs upward...
- The water pump failed, leading to a coolant leak and potential engine overheating. The failed component is not available for inspection, as it was replaced by an independent repair shop after the dealership quoted an excessive price an...
I was smelling fuel from my car so stopped to have it checked and was told there is a significant spray of fuel coming from the fuel rail and hitting the electrical wires. I was told that it could go on fire at anytime and the car cannot...
The alternator failed causing the vehicle to shutdown in the middle of traffic. I was on a surface road not the highway so I was able to get local police to assist. When it failed there was no car electrical system function, so I could ...