Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Audi Q7 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2018 Audi Q7. The contact stated that while driving at an undisclosed speed, the low oil warning light illuminated. In addition, the contact stated that the oil level was topped off every 700 miles. The vehicle was taken to the dealer where it was diagnosed with a failed piston and excessive oil consumption. The contact was informed that the piston needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 75,000.
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. …
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. …
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 am reporting suspected odometer fraud on my 2018 Audi Q7 3.0T Prestige (VIN: [redacted] ). Between May 8 and June 13, 2025, while I was the sole driver of the vehicle, Audi dealership service records show an odometer increase of 5,282 miles (from 78,260 to 83,542). However, independently verified GPS trip data from the Audi Connect system confirms I drove only approximately 2,103 miles during this period - a discrepancy of approximately 3,178 miles. The vehicle was serviced at two Penske-owned dealerships: Audi of Arlington (3200 Columbia Pike, Arlington, VA 22204) and Audi of Chantilly (14839 Stonecroft Center Ct, Chantilly, VA 20151). Only authorized dealer diagnostic equipment can alter odometer values. This manipulation resulted in the wrongful denial of my extended warranty coverage and a $37,567.16 out-of-pocket engine replacement. …
At approx 56,600 miles I received a low engine coolant error on my vehicle. Upon inspection, all engine coolant was gone from the tank. Engine coolant was refilled by me at home. The next day, I received a low oil error on my vehicle. Upon inspection, the oil was below the minimum level. 1 quart of oil was added to my vehicle and we promptly took the vehicle in for inspection as this did not seem like a coincidence. Upon inspection at Motor City Euro Repair, it was noted that the water pump was leaking causing the engine coolant and oil levels to decrease. Water pump replacement required, which should typically not be a required repair until 100,000 miles. Audi is aware of this issue, but no recall has been made. There is also a class action lawsuit for this issue, but the 2018 Q7 Prestige 3.0 is not part of the vehicles in the suit. …
This is a well known issue and multiple People have reported on this issue to Audi. It's is very common in Audi Q7 models from the year 2017 - 2023 where the PCV valve have a defect and the marker on the front passenger and driver side lights as well are out. These are both very costly repairs that are thousands of dollars that truly hurt the consumer. They know that the 3.0 L engine had a severe problem with the PCV valve and crack case and they have not warned customers and it's truly hurting the consumer in this economy. Please file this petition and I bet customers flock as I saw a Reddit thread with thousands of people complaining about the same common issue and problem with their Audi Q7. CRANK CASE VALVE/OIL SEPARATOR. …
I have received two "cylinder misfire" notifications. The first occured in December 2023 on a remote stretch of freeway. The second occured in June 2024 on a remote stretch of highway. In both cases, I immediately lost power and put myself and cars around me at risk because I had to pull over onto the side of the road to re-start the car. After the second incident, I now have no confidence in taking my car, only 6 years old and with 74K miles on it, out of the city and into the countryside. The symptoms of this issue include frequent oil burn / oil top-offs. My car requires a quart of oil every 200-300 miles. There are no leaks in my driveway. The leaking all seems to be coming from the cylinders. I am taking my Q7 into a mechanic, again, next week and I am concerns the solution will be "new engine" which costs more than the car is worth.
1.Interior color light bars: These light bars developed inconsistency. Audi repaired the inconsistency however now the light bars only display pink (not white) during start up. The dealership tried telling me it's not pink, then claims to be color blind. I have artiest friends who maintain the color is pink. 2.Engine start-stop: Dealership confirms the Q7 will shut down as part of the start-stop feature before the vehicle has stopped. I explained to the dealership that the Q7 speedo claims moving 1 to 2 mph faster than it is moving. Therefore, during slow speed braking, stop sign, the Q7 will shut down before it stops moving. Without the engine on, the Q7 will lurch to a stop or and forcing the transmission to turn. 3. Low oil light comes on between oil changes sometimes.
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.
Engine complaints in other Q7 years
Frequently asked questions
How common are engine problems on the 2018 Audi Q7?
NHTSA has 40 complaints about the engine & cooling of the 2018 Audi Q7, 28% of the model year's 144 complaints. The component named most often is cooling system (1 mentions).
Is there a recall for 2018 Audi Q7 engine problems?
No. NHTSA lists no engine & cooling recall for the 2018 Audi Q7, though it has 3 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2018 Audi Q7 engine problems start?
Half of the complaints with a recorded mileage happened before about 20,000 miles, and 75% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.