What 139 owners told NHTSA about the 2018 Audi Q7

My 2018 Audi Q7 3.0T Quattro is experiencing extreme oil consumption — dropping from full to minimum level in approximately 230 miles. This is approximately 14x beyond Audi's own threshold for excessive oil consumption of 0.5 quarts per 1,000 miles. Documented timeline: May 2026 (88,692 miles): Oil change required 2.2 extra quarts beyond standard 7.2qt fill. Low oil light triggered during highway travel. June 27, 2026 (90,200 miles): Authorized Audi dealer formally documented "oil consumption is very high" in their service system and scheduled an official oil consumption test. June 28, 2026 (90,351 miles): Audi MMI system showed oil near minimum after only 151 miles. June 30, 2026 (90,397 miles): Audi MMI showed oil at Stage 2 warning after 197 miles. June 30, 2026 (90,430 miles): Audi MMI showed oil at minimum line after 230 miles total. All readings documented with timestamped photographs from Audi's own MMI system. The authorized Audi dealer has documented repeated oil top-offs in their service system. Audi USA Customer Care was contacted on June 30, 2026 and denied goodwill repair citing no active recall and vehicle out of warranty. An open case has been filed with Audi USA. The engine lubrication system appears defective. Oil dropping to minimum in under 230 miles without adequate warning poses serious safety risk of catastrophic engine failure while driving at highway speeds. The authorized Audi dealer has scheduled an official oil consumption test and inspection for July 2, 2026. Results will be available upon request. Vehicle is available for inspection upon request.

NHTSA ODI 11747856

I AM GETTING FRONT LEFT SIDE MARKER LIGHT FAULTY PROBLEM. I WAS TOLD THIS IS VERY COMMON FOR 2018 AUDI Q7. PLEASE INVESTIGATE THIS ISSUE AND SEE IF I AM QUALIFIED TO GET THIS REPLACED BY AUDI. APPARENTLY, THE REPLACING THE LAMP ISN'T EASY BUT WOUDL REQUIRE TO REPLACE THE WHOLE LIGHTING FIXTURE WHICH COULD COST OVER $2K. THANK YOU.

NHTSA ODI 11739746

Parking light defective message on dash board. Looked at the light and all lights present. Talked to a dealer and the headlight assembly to replace is 6K plus. For a small yellow side light inside of headlight that is still on, but the message on dashboard says otherwise. Was told that it isn't outputting enough light power.

NHTSA ODI 11738684

I am reporting suspected odometer fraud on my 2018 Audi Q7 3.0T Prestige (VIN: [XXX] ). 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. I have a fully documented demand letter with ten supporting exhibits including service records, Audi Connect trip data, and a detailed timeline. The dealerships did not respond to my demand letter. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11730885

I’m reporting a serious safety issue with my 2018 Audi Q7. Both rear suspension springs failed suddenly while I was driving at highway speeds 70 MPH, with no warning at all. This was extremely dangerous—I almost lost control of the vehicle when it happened. The rear of the car dropped and handling became unstable immediately. There were no prior signs, noises, or issues leading up to the failure. This kind of failure should not happen under normal driving conditions, especially on a vehicle like this. Having both springs fail at the same time creates a major safety risk not only for me but for others on the road. I had to replace both rear springs at my own expense. Based on what I’ve seen, this may be a known issue and not just a one-time occurrence. I’m asking NHTSA to look into this problem and determine if there’s a defect with the suspension system on the 2018 Audi Q7 that could require a recall or further action.

NHTSA ODI 11729693

ALERT " Left Front side marker light defective" see owner manual. That is the message

NHTSA ODI 11717586

The car has always (including during warranty period) required addition of engine oil in between scheduled maintenance interval, and problem got worse as function of age/miles. Audi has diagnosed this issue and it has been determined that the engine consumes excessive oil and requires new piston skirt. The cost of the labor is not something Audi is willing to pay for and there is a class action lawsuit. Audi has sent an email/letter to certain owners of the vehicle. My VIN for some reason wasn't included but now Audi has verified, but not willing to pay for the cost to replace the engine or fix it.

NHTSA ODI 11716861

Excessive oil consumption and potential for engine to blow up

NHTSA ODI 11715434

Left Front side marker light faulty. is the warning on the dashboard - I have noticed there is a recall I believe 2017 2018 for the same part and this is on a 2019 so it's obviously the part it actually says if there's a software fix

NHTSA ODI 11709667

The crankcase ventilation valve is malfunctioning resulting in excessive oil consumption and unsafe idling. The Extended Warranty dated 5/24/19 with Number AWA-19-03 should be extended to other model years.

NHTSA ODI 11705971

Right Front Parking Light Defective

NHTSA ODI 11701912

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

NHTSA ODI 11700992

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.

NHTSA ODI 11700557

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.

NHTSA ODI 11700458

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.

NHTSA ODI 11700218

The console displays side marker light defective warning, but both the side marker lights are working

NHTSA ODI 11698838

The contact owns a 2018 Audi Q7. The contact stated that on several occasions while driving at various speeds, an orange triangle warning symbol and a message that the "Driver’s side Front Marker Defective - See Owner’s Manual" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed that the front driver’s side marker needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 84,901.

NHTSA ODI 11698524

While driving on I-90 in January 2025, the steering wheel malfunctioned causing loss of control of the car. The warning message came on the dashboard to immediately stop driving. Was able to pull off to the shoulder, turn the vehicle off, and call AAA for assistance. They towed the car to a repair shop.

NHTSA ODI 11697260

Both rear coil springs broke which the Audi shop has said is very rare to have happened

NHTSA ODI 11688937

The contact owns a 2018 Audi Q7. The contact stated that there was an abnormal fuel odor inside the cabin of the vehicle at start-up, and the MMI System warning light remained illuminated. The vehicle was taken to a local dealer, where the vehicle was diagnosed, and the contact was informed that the fuel pump was faulty and needed to be replaced. The vehicle was repaired; however, the MMI System was not fixed. The manufacturer was notified of the failure. The approximate failure mileage was 93,000.

NHTSA ODI 11684539

Passenger side rear coil spring broken, shocks leaking. Confirmed by dealer. No warning lamps, messages. Potential safety risks include: Suspension compromise with the balance and alignment of the vehicle. There is a risk of loss of control especially with emergency maneuvers or sharp turns. This leads to poor vehicle control, increase risk of roll of vehicle and braking control. Can cause uneven wear on tires which can cause a blow out or loss of grip on roads. The leaking shocks puts stress on other parts of the vehicle. Suspension may not respond correctly if the vehicle were to hit a pothole or make a sudden turn. The broken coil can puncture a tire, causing loss of control which can result in an accident. The vehicle is garaged year round, maintained very well, with no excessive wear and tear. One owner vehicle.

NHTSA ODI 11677881

#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.

NHTSA ODI 11672505

The rear passenger side suspension spring coil broke while driving. The possibility of this failure puncturing a tire, dislodging from the vehicle into traffic, or causing control/stability issues of the vehicle is significant. The vehicle has been towed and is sitting until a fix is determined. No warnings were given before the incident. It happened on a smooth, flat, straight road at the time of occurrence.

NHTSA ODI 11672328

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. LOUD WHISTLE NOISE COMING FROM ENGINE Parts: BOLT, Qty 14.00, CA TRIM, Qty 1.00, CA REPAIR KIT, Qty 6.00, CA GASKET, Qty 6.00, CA GASKET, Qty 6.00, CA TUBE, Qty 1.00, CA TUBE, Qty 1.00, CA WASHER, Qty 1.00, CA

NHTSA ODI 11668291

Left front side marker light defective.

NHTSA ODI 11664230