Engine And Engine Cooling Problems of Audi Q7 - part 1

Catastrophic engine failure, this occurred 2 weeks after a service appointment where nothing was detected. The car only had 86,000 miles and it is unrepairable. We have now found that this could be due to a design flaw in this model which we were unaware of.

See all problems of the 2018 Audi Q7 🔎.

- engine water pump failure and coolant intrusion into the vacuum system. Parts were replaced on 5 Nov 2025 and possible still at the dealer's location. - the defect poses the following safety risks: it resulted in contamination of vacuum lines; potential for sudden engine stalling or loss of power while driving; potential for catastrophic damage to engine-management systems dependent on vacuum integrity; potential for damage to emissions and combustion-control systems; potential for reduced braking system performance if vacuum supply is compromised, expensive and unexpected component failures, and possible recurrence since the cause appears related to design rather than normal wear. Any failure can create cascading hazards affecting safety-critical functions. - the problem was confirmed by an authorized Audi dealer. Dealer name and contact info can be provided upon request. - I do not know if the dealer delivered the involved parts to the manufacturer or insurance representative for inspection. Police or others did not inspect it. - there were no warning lights, messages, or other symptoms of the problem prior to the failure. It was identified by the Audi technician on 5 November 2025 while the vehicle was in the dealer for other services. The failure occurred at 47,855 miles which is far below the average lifespan of a water pump or vacuum system.

See all problems of the 2021 Audi Q7 🔎.

2018 Audi Q7 piston melting diagnosed by a certified mechanic due to excessive oil consumption due to defective pistons. A class action suit was filed. And a warranty extension extension issued. There is no record of a warranty extension and should be. Please advise.

I am reporting a progressive oil consumption defect that led to a catastrophic engine failure in my 2018 Audi Q7. The vehicle was purchased certified pre-owned (cpo). I reported the excessive oil use to an Audi dealer. The dealer attempted to address the issue by performing an engine cleaning/flush, but the engine failed shortly afterwards. Over time, the vehicle required frequent top-offs between service intervals. Eventually, the engine suffered a mechanical failure, resulting in a broken exhaust valve and internal engine damage while driving on the highway. The Audi dealer provided a repair estimate of approximately $12,000. Audi of America offered 40% assistance to make the repair, but does not recognize the underlying excessive oil consumption issue. Furthermore, the proposed repair only replaces the damaged valve and related components, but does not address the underlying excessive oil consumption that caused the failure. This means the vehicle may still: •unexpectedly run low on oil, •lose power while driving, •suffer additional internal damage, or •again experience sudden engine failure while driving. These conditions can cause dangerous drivability issues, including loss of acceleration and potential stalling at highway speeds. This appears to be a serious safety-related defect involving lubrication failure, component breakage, and potential loss of power. I am requesting that NHTSA review this issue to determine whether similar failures are occurring in other Audi Q7 vehicles with the 3. 0t engine.

I am submitting this complaint regarding a serious safety issue I experienced with my vehicle. Shortly after starting to drive, about 2 miles from my home, while traveling at approximately 25 mph, the vehicle suddenly began to shake violently and came to a complete stop at the intersection of crescent street and astoria boulevard. At that moment, I lost all control over the steering wheel—it completely locked up. The dashboard displayed the message: “drive system malfunction – contact service. ” these diagnostic trouble codes (dtcs) appeared: •p2179 •p025c •p0087 •p0306 this incident posed a major safety risk, as I was unable to steer or move the vehicle in a high-traffic area. I am very concerned that this could happen again or to other drivers under more dangerous conditions. Please investigate this matter as it may indicate a serious defect that could affect others.

See all problems of the 2017 Audi Q7 🔎.

This vehicle developed low oil alerts within 6 weeks of me receiving it with normal city driving. Multiple testing visits and comprehensive consumption testing later, it continued to have the low oil alerts very frequently and various random malfunction alerts like parking brake alert etc. For each complaint I took it to the dealership and did whatever they recommended but no eventual resolution was found. Early October this year, in the middle of traffic multiple alerts came on including drive system malfunction, parking brake malfunction and start stop malfunction. So many that the whole console just lit up and the car started rocking in the middle of traffic and I had to slow down to keep the vehicle in control. The car was rocking visibly and I had difficulty in maneuvering it to a safe location . I contacted the dealership and they gave me an appointment 4 weeks out saying that since the lights were solid and not flashing I could choose to drive the car. However it didn’t look safe to drive so I didn’t use it thereafter. They later told me after a diagnostic evaluation that the engine needed to be replaced as the slapping piston rings had scraped the cylinder walls.

During a routine service on my 2021 Audi Q7, the shop found the coolant level low and traced it to a leak. The Audi dealer later diagnosed failure of the water pump, thermostat, valves, and related parts, with a repair estimate of nearly $5,000. I discovered that prior model years (up to 2020) were included in a class action lawsuit for the same type of cooling system failures, though my VIN is not covered. This appears to be the same issue, happening just a few months outside of warranty, and raises concerns about premature failure and safety risk from overheating.

My water pump went out on my 2021q7. The car had 57271 miles on it. I looked up the VIN and it is not covered in the class action lawsuit however, my model and my year comes up but not my VIN. I feel a water pump should last until 100,000 miles.

Warranty will be over in 60 days; the catalyst coverter is going back, the Audi dealer and Audi corporate are delaying the fixture do to some mis communication between dealer and corporate. The problem has to do with def gases not being cleanup. The error code is p20ee00 and the engine light is on. The part is under warranty and Audi corporate is delaying the fixt because the do not wish to pay for the cost. They have had my vehicle for a full week and no decision when to replace the part. I strongly believe they want the warranty to expire so the customer has to pay for cost of the catalyst. The dealer has verified that part is under warranty but corporate does not response to the dealer. 0.

See all problems of the 2015 Audi Q7 🔎.

El carro fue comprado en febrero 2024 en greenway Ford inclui un paquete DE cambio DE aceite,rotacion DE llantas y cambio DE los limpiabrisas. Esto ha sido un dolor DE cabeza. Cada vez que se le realiza el servicio sale con la luz del ingenier prendido, en la computadora DE auto zone aparece turbocharger intercooler(p0299). Ademas el asiento del pasajero esta siempre muy caliente el carro gasta demasiada gasolina y esta perdiendo velocidad,en verdad no se si el carro esta gastando aceite, ya que recién cambiado el sistema me mostro falta DE aceite . O el consecionario no cambio el aceite correctamente. .

Water pump failure.

To whom it may concern, I am writing to formally report a serious and recurring safety issue involving my 2018 Audi Q7. The vehicle has experienced repeated drive system malfunctions that result in sudden loss of power, reduced acceleration, and warning messages on the dashboard such as “drive system: malfunction” and “electrical system failure. ” these incidents have occurred while the vehicle was in motion, creating a hazardous situation for both the occupants and surrounding drivers. In my case, the vehicle unexpectedly lost power while driving at highway speeds, forcing me to maneuver to the shoulder with diminished control. This sudden malfunction is unpredictable and could easily result in a collision or serious injury, especially in high-speed or high-traffic conditions. Upon researching this issue, I found that numerous other 2018 Audi Q7 owners have reported similar problems. These complaints consistently cite the same symptoms, including sudden deceleration, electrical system errors, and power steering failure. It appears to be a widespread defect that may warrant a recall or further investigation by the NHTSA. I urge your office to investigate this matter promptly to prevent potential injuries or fatalities. I am willing to provide service records, diagnostic codes, photos, or any other documentation that may support this complaint. Thank you for your attention to this serious safety concern. I hope the NHTSA will take appropriate action to ensure the safety of all drivers affected by this defect.

The engine burns oil. At about 60k miles started to burn about a liter every 10k miles. Once the engine got to about 80k engines it started burning a leter about every 1k miles. The high amount of oil consumption fouled the spark plugs, coils, injectors and sensors. This resulted in a drive system malfunction, caused loss of power in the engine that ultimately ruined the engine with less than 100k miles.

Lights on dash were flashing in cluster which made it look like it was low tire pressure. I had a portable air pump which showed tires were fine. The vehicle went into some kind of limp mode which prevented the vehicle from driving the speed limit. It was taken to auto service center. The diagnosis was engine failure due to a burnt valve. It's been confirmed through the dealership, mechanics and consumers that is a common problem with this particular make and model vehicle. This engine failure left me on the side of the road and not feeling safe at all while being approximately 3 hours from my home. As an Audi owner I'm was so disappointed to be told that I needed a new motor even though it still runs in limp mode. This vehicle has less than 150k miles. It was the best european vehicle I ever owned until it wasn't. Bad call and poor quality control Audi!.

See all problems of the 2013 Audi Q7 🔎.

The issue is related to Audi TSB 2048402/3. 2017 Audi Q7 3. 0t. First the an engine light appears, then get drive system malfunction warning appears, then car misfires, then car goes into limp mode causing the car to rapidly slow down (while driving on a highway!!!!!). This is is common issue on the 2017 Audi Q7, code is p05a000 active grill shutter "a" stuck on. Which then triggers the drive system malfunction, misfire, and limp mode. Audi will not repair due to mileage on vehicle. Concern is this is a know issue and a safety concern.

The gasket seals and the seals on the cylinder are not sealed causing fuel to peak from fuel injectors.

My engine just failed after over a year of having to put oil in. The car has 77k miles and has been regularly maintained. Audi used this as a "demo car" and after purchase we immediately had to put oil in and were told verbally this is not an issue. The excessive engine oil consumption caused this catastrophic engine failure our an independent and trusted mechanic reports the engine has failed and cylinder number five only has 30 pounds of pressure. Please advise on what I can do with Audi for repair. We also have a 2019 and are fearful this will happen to that car as well. Thank you.

Engine started knocking. Excessive use of oil in vehicle. Even after putting oil in and getting the oil changed several times, the vehicle constantly leaks and is consuming massive amounts of oil.

#1 cylinder lost compression causing car to almost immediately stop while driving 78mph on the interstate. Car was towed back to manufacturer where I bought the car. The car 2018 Audi Q7 has 68,000 miles, all servicing of vehicle was done at dealership where I bought the car. Never any problems with engine except the occasional need for engine oil requiring being topped off.

Engine rebuild/replace: cylinder 1 intake valve has broken causing misfire/ oil consumption. Due to piece of valve falling into combustion chamber, damage/scoring on cylinder wall. Recommend replacement of engine.

According to the dealer’s diagnosis, a burnt and broken valve caused the car to shake violently while I was driving on the highway with my family, including our three children. Prior to this incident, there were no warning lights or error messages. Only after the shaking began did a “drive system malfunction” alert appear on the dashboard.

For over 24+ months now, the engine has been showing signs of excessive oil consumption. I've had the engine light come on requesting for me to add a quart of oil. . . On average, every 2,000 miles. I'm concerned with this excessive oil consumption as it is a major safety issue, as the piston rings may fail due to a possible faulty engine design (most likely since this excessive oil consumption is a frequent occurrence with other drivers of this vehicle). When discussed with the dealership, they are aware of the situation (2017-2019 Audi Q7 excessive oil consumption) and they request that I pay for an engine compression test. This amount of oil consumption shouldn't happen.

First time on highway since getting it back from the car repair vendor two days prior. Drive system malfunction occurred on the highway drive approx. 13 miles from my house. Car lost power and would stall and would barely idle. Stopped in the middle of highway traffic 3 times. Got the car towed to vendor that had serviced my car 2 days prior which involved changing rear brake pads and rotors, 6 supercharged spark plugs and air filter. Estimate of issue was damaged exhaust valves on cylinder 2 & 4. Recommended service was remove the cylinder heads, replace all exhaust valves, clean pistons and combustion chambers $8,032. 99.

The vehicle developed a misfire on cylinder 1. The dealership ran a 3 hour diagnostic that included using a borescope on all cylinders. One of the valves on cylinder 1 was identified as bad. The dealership indicated the only solution was to replace the engine and suggested trading the vehicle in for a new car.

There have been continuous indicators by way of the check engine light repeatedly appearing on my vehicle's dash for a number of years. A different determination was always discovered each time I took my vehicle to the only Audi certified dealership in my area. Most recently, I have been told that my vehicle now requires a fuel system replacement, high pressure fuel pump, all components in fuel tank, fuel rails, injectors, all rubber fuel lines for a cost of $16,830. 50. Coincidentally, I received information by mail from the manufacturer (Audi), indicating there was a safety recall 20w9--fuel pump flange for this exact same issue, and that my vehicle had been identified amongst the other reported 143,214 vehicles, as affected. This information was dated October 6, 2016. I immediately contacted my local Audi dealership to schedule an appointment to discuss next step options to resolve this recall issue, and was told then by my assigned service technician that the parts were not available at that time to render repairs, but I would be contacted when to bring my vehicle back in. Subsequently, I don't recall ever having that particular issue get resolved because a plethora of other issues related the countless times the check engine light regularly appeared became priority. Now I'm eing told that the exact recall issue I was notified about years ago is the latest identified problem and totally my "financial responsibility", because it's not being covered under warranty. This is as much of a safety issue now as it was then, but never got directly addressed or settled. Thankfully due to my awareness by being the regular, primary driver of my vehicle, I have been diligent in reporting check engine light ndicators, along with any other mechanical light issues each time they've appeared, and there have been no incidents or accidents posing a major threat to my safety. Of course, I wish to keep it this way when operating any vehicle on the roads I travel.

See all problems of the 2012 Audi Q7 🔎.

In July 2023, my 2020 Audi Q7 experienced a complete electrical failure at highway speeds due to a belt starter generator (bsg) malfunction. Audi replaced the bsg with the same faulty part. Months later, I noticed increased oil consumption and loud engine noise. Despite multiple service visits and reporting these issues, Audi failed to properly diagnose the problem. In January 2025, despite a clear check engine light indicating a problem, Audi dismissed my concerns. Just weeks later, in February 2025, the engine catastrophically failed due to undiagnosed internal damage. Audi repeatedly ignored diagnostic warnings and failed to address my complaints, putting my safety at risk. Audi consistently dismissed my concerns, attributing engine noise and oil consumption to normal wear. The failures posed safety risks, including sudden loss of power while driving. Despite documented defects, Audi refused to take responsibility or perform proper diagnostics, resulting in continued safety hazards. I am formally requesting NHTSA to investigate the widespread issues affecting the 2020 Audi Q7, including the bsg system and excessive oil consumption leading to engine failure. ” additional details: •component/system failure: the 48v belt starter generator (bsg) and the engine failed. The vehicle is available for inspection upon request. •safety risks: the electrical failure at highway speeds caused a sudden loss of power. The engine failure posed a risk of the vehicle shutting down unexpectedly while driving. •problem confirmation: the Audi dealership confirmed the engine failure and acknowledged the presence of metal shavings in the oil, indicating severe internal damage. •inspections: the vehicle has been inspected by the Audi dealership, and Audi representatives acknowledged the issue. •warning signs: the check engine light illuminated in January 2025. Additional symptoms included loud engine noise (‘tractor-like’) and increased oil consumption, which Audi dismissed.

See all problems of the 2020 Audi Q7 🔎.

2017 Audi Q7 with approximately 112k miles consuming oil at a rate of approximately 1qt per 500-700 miles. Misfire occurred on highway and then cleared overnight. Took to dealer and had them swap all coil packs and spark plugs. Approximately 500 miles later, multiple misfires in cylinders 3,5, and 6 and loss of compression while driving on highway at 70 mph. Vehicle taken to dealership where they completed diagnostics. 0 psi compression in cylinder 6, damaged cylinder walls, and broken valve. Cost of repair estimated at $25k.

The contact owns a 2023 Audi Q7. The contact stated that the mil warning light was illuminated. There was a yellow warning light illuminated with a message to take the vehicle to dealer displayed. While the contact’s wife was driving at an undisclosed speed and approaching an intersection, the yellow warning light turned red. The contact stated that the vehicle suddenly independently skidded to a screeching stop. The vehicle was towed to the local dealer but was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 32,000.

See all problems of the 2023 Audi Q7 🔎.

Drive system malfunction warning while driving on the highway at 75 mph and the car began sputtering, lugging, jerking and had to be manually shifted to get it safely off the highway. If we had been in traffic we would have been rear ended as the car drastically lost speed on the highway. Dealership initial diagnosis was a misfire in cylinder 4. Upon further inspection we were told that a piece of the exhaust manifold had broken off resulting in catastrophic engine failure and we needed to replace the long block at a quote of $32,000. Car had been serviced only at the Audi dealer and all Audi care maintenance had been completed. We had informed the dealer that the car was burning oil on two previous service visits and we were adding a quart every 1000 miles or so and we were told that was normal for a 2017 Q7 with over 80,000 miles on it. Last service inspection and Audi care package in September 2024 we were told the car was in great shape. Catastrophic engine failure in December 2024.

The contact owns a 2017 Audi Q7. The contact stated that while driving on the highway at 40 mph, the front end started shaking violently, with several unknown warning lights illuminated. The following messages "drive malfunction and oil consumption" were displayed. The contact immediately pulled over and had the vehicle towed to a local independent mechanic, where the vehicle was diagnosed. The contact was informed that the engine was faulty due to oil consumption and needed to be replaced. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The contact was informed that the VIN was not under recall. The manufacturer was notified of the failure. The approximate failure mileage was 108,000.

Oil consumption issue began June 2021 with my 2017 Audi Q7 with the 3. 0 engine, we were at 78,841 miles. Our vehicle was always serviced at the dealer on the recommended schedule. The dealer stated high oil consumption of 1 quart per 1,000-2,000 miles was normal. The high oil consumption issues continued. At 99,559 miles the car began shaking on the way home from a routine oil change. They found cylinder 3 spark plug covered in oil and replaced all spark plugs to clear misfires. At 104,002 miles the n428 oil pressure regulation valve was replaced, which seemed to improve oil consumption temporarily, but gradually got worse with frequent top offs. On 1 December 2024 at 123,616 miles the car started to shake while traveling at 70mph on the interstate, with the engine lights on. The dealer found crusted spark plugs and identified that cylinder 1 had a burnt/broken exhaust valve due to excessive oil consumption and residue buildup. The required long block replacement would exceed the value of the car. Clearly a defect in the 3. 0 Audi engine.

2017 Audi Q7 premium plus. 85000 miles. The car runs normal and has no warning lights and has been regularly services at Audi dealership. 1. Rear driver side spring broken. This is stated as a common problem with this model as researched on Audi forums. 2. Engine burning excessive oil. Have to add a quart every 500 miles. This is also stated as a common problem with this model as researched on Audi forums. Both incidents have a potential safety concern as a damaged suspension and engine can be detrimental for driving.

Driving with the family on interstate 81south when suddenly the car went from riding smoothly to a rough rumbling sensation. Then all sorts of alarms sounded and the engine light, oil light and system malfunction indicator light came on simultaneously. We pulled over immediately and turned the car off. We looked in the manual to check the severity of the indication lights. We wanted to determine if we could drive to the nearest exit. We started it back up to see if it was some sort of glitch. It remained so thankfully we were right near an exit and exited and called for roadside service. It was towed from christiansburg, va back to roanoke Audi at 2006 peterscreek rd roanoke, va 24017 on Nov 9th. The dealership concluded that cylinder 1 was burned out with a possible damaged long block assy. I have had all services and taken great care of the car. However, in between services the car would always require an additional 1qt of oil.

Driving on highway at 70 mph and high engine temp light came on. Said to pull over and continue to run car until temp decreased. I got over as quickly as I could ( no more than 1/4 of a mile) and sat on side of PA turnpike as engine cooled. I was at bottom of an exit ramp. I slowly proceeded up the ramp and warning came on again and red temp light reached again. I pulled right into the gas station at top of tp exit ramp. It still said to continue to run the car. I sat with my son in the car and ran the car in the shade. The temp was decreasing and then all my electrical lights came on, yellow battery warning light on and then suddenly the red battery light and all systems failed. Car turned off. Called aaa to take to my mechanic as Audi was a 3 hour wait for a tow and 3 weeks for service appointment with no loaners available. My certified mechanic said water pump completely dislodged. He replaced water pump, thermostat (which was already replaced bc it failed in year 2 of ownership). After repair, 48 volt battery would not take a charge. Assumed faulty alternator and/or battery. Alternator was already replaced once at year 1 as car died while driving as well. We had car towed to Audi and they are reporting known issues with water pump but not issuing recalls. Also known issues with alternator repair parts that were used in year 1 but no warning to consumers. They are diagnosing problem now and if alternator and subsequent battery issue, it will be covered but not if battery issue comes back as electrical in nature.

At my 100k mile inspection it was noted that an engine mount is leaking. With a repair cost in the multiple thousands I checked online and have found this to be an extremely common occurrence with possible disastrous implications.