2019 Audi Q8 fuel system problems

Filed Nov 3, 2026 · Engine, Fuel system · GA

I am reporting a serious and recurring safety issue involving my 2019 Audi Q8. The vehicle has experienced repeated engine system malfunctions that have ultimately resulted in complete engine shutdown while driving. The first incident occurred when the vehicle would not start and displayed an “Engine System Malfunction” warning. I was able to get the vehicle operational and bring it to the dealership, where the fuel pump was replaced. Just three days after the repair, the same problem returned, requiring the vehicle to be towed back to the dealership. The dealership cleared the diagnostic code and kept the vehicle for approximately three weeks before returning it to me, stating that the issue had been resolved. A few days after receiving the vehicle back, the malfunction occurred again. This time, the engine completely shut off while I was driving at highway speeds. This created an extremely dangerous situation, as the sudden loss of engine power at highway speeds presents a significant risk of a crash, particularly in traffic or while attempting to maneuver out of danger. The vehicle is currently completely inoperable, and the underlying issue remains unresolved despite multiple dealership visits and attempted repairs. I am concerned that this recurring malfunction represents a significant safety defect that could affect other Audi Q8 owners. The possibility of an engine unexpectedly shutting down while traveling at highway speeds presents an unacceptable safety risk. I am requesting that this complaint be documented and investigated to determine the underlying cause and whether other vehicles may be affected.

Filed Sep 18, 2025 · Engine, Fuel system · TX

engine begin to misfire and felt like it was ready to stall. within a minute of the misfiring the engine light came on. i was in the middle of highway struggling to get my vehicle to the dealership where purchased which thankfully was only 5mins away. tech heard noise coming from fuel pump near the engine and recommended replacing along with spark plug. after replacing tech advised me to take my vehicle to audi to perform a software update that will correct the misfire and prevent the MIL from illuminating. Got that done to only be presented with a knocking noise again a month or two later. Took my car back to Audi to run a full diagnostic to find out my engine is in early engine failure due to metal shavings in the oil filter. tech states shavings in the oil could originate from the fuel pump failure and the debris would have traveled into the engine oil causing critical damage to the engine.

Filed Jan 26, 2025 · Fuel system, Steering · CA

There is helicopter type of noise coming from fuel pump and it’s increasing while driving very annoying and i feel steering is loose and I notice on google same problem with so many Audi q8 and sq8

Filed Sep 26, 2024 · Fuel system · NY

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 be driven. Audi has a recall for this exact issue for 2016-2018. This is clearly the same issue but they are not issuing a recall for 2019 models and it’s extremely dangerous.

Filed Apr 12, 2024 · Engine, Fuel system · PA

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 not even turn on my emergency blinkers. This is apparently very common on Audis, as the same part was used to replace the alternator…. It took a month for the dealership to get the part in stock.

Filed Oct 19, 2023 · Engine, Fuel system · PA

May 19th water pump cooling system pump my wife driving right on a highway on a left lane car start streaming and engines suddenly shut off thank God she make it to the left on hwy we throw the car to dealer they says engine went because of water went to engine and after that I have a big issue with the dealers and everything even my insurance pay for the new engine and everything and this is the issue a woman driving this car this is so much risk audi not doing anything about it

Filed Oct 7, 2023 · Electrical, Fuel system · NY

Electrical malfunction warning light and assorted other warning lights came on during acceleration on highway. Loss of car functions due to error. Car is waiting on parts due to failed belt start generator as part of its 48 volt mild hybrid system.

Filed Jan 10, 2023 · Electrical, Engine · MA

While driving in heavy traffic on 12/23/22 the entire electrical system shut down and all power was lost. Fortunately I was not hit by another vehicle and coasted into a parking lot with no power. This is very dangerous. Per conversations with the dealership and with Audi (1/10/23), alternators on thousands of vehicles are failing (possibly due to a software issue). The vehicles are sitting on dealer lots and in driveways useless. Audi online forums confirm this as well. There are no alternators available. No recall has been issued and no warning of this unsafe situation has been made by Audi. Per the dealership, they are largely in the dark as well as there has been no meaningful communication by Audi. Someone will get hurt when their car dies on a highway. People are paying thousands for their cars to be undrivable. Audi dealers will not trade the vehicles because they are effectively worthless until repaired.

Filed Jan 3, 2023 · Electrical, Fuel system · OH

The Generator (Part #: 4N0903028P) failed causing the car to shutoff while driving. This is a known issue by Audi as it has issued a TSB. Further steps must be taken by the OEM to ensure safe operation of the vehicle by its owners. This is a safety issue that must be resolved soonest!

Filed Dec 5, 2022 · Electrical, Engine · IN

Driving down the road when sensors stopped working. Car read electrical system malfunction and engine shut down. Had to coast to the shoulder. This is a known safety issue, and should be completely recalled.