I am reporting an ongoing cooling-system/water-pump issue with my 2020 Audi Q8, approximately 75,000 miles. The problem began when the vehicle repeatedly displayed a low-coolant warning. Inspection confirmed the coolant level was very low and a significant problem involving the coolant pump/vacuum system was diagnosed. The water pump was subsequently replaced. After the repair, the vehicle initially appeared normal, but problems continued. I experienced engine sputtering/rough running and the vehicle felt as though it might stall while stopped at a traffic light. A Drive System Malfunction/check-engine warning appeared, and cruise control/driver-assistance functions became unavailable. The check-engine light has continued to return intermittently. There was also an issue with a loose cap following the water-pump repair, which was corrected. Despite this, the low-coolant warning later returned and the coolant reservoir was again confirmed to be low. Coolant was added and the vehicle was returned to the repair facility to locate a leak. The shop kept the vehicle for several days and ran it for approximately two hours while inspecting it but could not reproduce or locate a coolant leak. The check-engine light went out during testing but returned shortly after the vehicle was picked up and driven normally. A sensor was also replaced based on a diagnostic code, but the check-engine light returned afterward. I have now spent more than $3,000 attempting to correct these issues, yet the cause of the recurring coolant loss and warning lights has not been determined. I am concerned that this may represent a recurring defect involving the water pump/cooling or related vacuum-control system. My primary safety concern is the possibility of unexpected coolant loss, overheating, engine malfunction, reduced power, or stalling while driving. I am requesting that this complaint be documented and investigated for similar incidents involving 2020 Audi Q8 vehicles.
- NHTSA ID
- 11758701
- Incident
- Jun 8, 2026
Engine failed at 78,990 from an manufacturer defect that Audi knows about for the last couple of years. Audi extended warranty due to the failure to 8 years or 80K miles. The engines can lock up due to a piston failure in the scored cylinder walls causing a crash. Oil consumption is very high causing vehicle to burn oil and not pass smoke test. Please investigate these engine failure and manufacturer defects with this engine in multiple vehicles 3.0L turbo gas engine thanks
- NHTSA ID
- 11712895
- Incident
- Jun 23, 2025
Water pump failed coolant leaked all over the vehicle five years old and a $7500 repair vacuum seals and most of the engine is damaged from the coolant. I have the video from the dealership but can’t upload
- NHTSA ID
- 11693465
- Incident
- Oct 1, 2025
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 $27,000 Audi needs to be investigated and held accountable for people that have faulty engines and can make the car crash when engine locks up
- NHTSA ID
- 11689306
- Incident
- Jun 9, 2025
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 upwards of $5k. When I first brought into dealer, the service rep mentioned that the fluctuating coolant lines wouldn’t be an issue but I further pressed them on doing a pressure test to which the issue was discovered. This is a huge safety problem if my engine was to overheat or face and other issues on the leak. I’ve never heard of a water pump going bad so quickly.
- NHTSA ID
- 11662231
- Incident
- May 2, 2025
- 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 and could not complete the repair in a timely manner. - A failing water pump can cause engine overheating, sudden power loss, or complete engine failure while driving, which increases the risk of an accident. Additionally, I noticed the smell of coolant inside the cabin, which could indicate a leak that might pose a fire hazard or expose occupants to coolant fumes. - Yes, the issue was diagnosed by an Audi dealership (Audi Northlake), which confirmed that the water pump had failed and needed replacement. Due to their high repair quote and scheduling delays, I had the repair completed at an independent service center, which also confirmed the failure and replaced the water pump. - The issue was confirmed by an Audi dealership but was not formally inspected by Audi corporate, law enforcement, or an insurance company. - Yes, I noticed a coolant smell inside the cabin for a few days before taking it to the dealership. However, there were no warning lights or messages on the dashboard before the failure was diagnosed.
- NHTSA ID
- 11643976
- Incident
- Oct 18, 2024
The contact owns a 2020 Audi Q8. The contact stated that the vehicle was consuming an excessive amount of engine oil. The contact stated that the oil needed to be topped off frequently. The Check Oil warning light was illuminated and remained illuminated. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 50,000.
- NHTSA ID
- 11572177
- Incident
- Mar 5, 2023
- Mileage
- 50,000 mi
EngineFuel system
Filed Dec 14, 2022
My boyfriend was driving the vehicle and it killed on him in the middle of Veterans Highway in Metairie. La back in August 2022. I did not want to drive the car after that. I have grandkids and am a single female and do not want to die or get in a serious accident because the fuel is not getting to the engine properly, or be stranded on the side of the road. i then tried to sell the car and was told that a recall was issued and no one would sell it for me. and so then I was not going to sell a vehicle that is now a danger to everyone on the road. I am still having to pay a car note, and insurance on a car I cannot drive. I have since tried to make several appointments with Audi to get this corrected and they have cancelled on me 3 times because there is no remedy/ solution. I had the car towed to Audi because I refuse to drive a car on the road that is unsafe and put everyone in danger and my grandkids. I even asked them for a rental and they told me because I did not buy the car from that Audi they could not provide me with one.
- NHTSA ID
- 11497429
- Incident
- Aug 11, 2022
EngineFuel systemPowertrain (other)
Filed Oct 22, 2020
THE VEHICLE'S START STOP SYSTEM OR TRANSMISSION SEEMS TO BE SLUGGISH LEADING TO VARIOUS BOUTS OF HESITATION ESPECIALLY WHEN SLOWING DOWN AND COASTING AT A SLOW SPEED AND THEN TRYING TO ACCELERATE. THIS WAS ESPECIALLY NOTICEABLE WHEN ATTEMPTING TO TURN LEFT FROM A LEFT TURN LANE AND HAVING THE CAR HESITATE FOR WHAT FELT LIKE A SECOND OR TWO WHICH COULD LEAD TO A CRASH IF SOMEONE WAS COMING IN THE OTHER DIRECTION.
- NHTSA ID
- 11365737
- Incident
- Oct 20, 2020
- Mileage
- 3,000 mi
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.