Crankcase (pcv) Problems of Audi Q7

My 2017 Audi Q7 prestige 3. 0t 6cyl gas crec supercharged has experienced repeated, serious failures involving the engine, powertrain, and fuel system. - at 72,000 miles, the vehicle developed coolant leaks under the supercharger, a failed water pump, and soaked drive belts. Repairs included multiple hoses, gaskets, and thermostat replacement. -shortly after, repeated pcv/oil system failures caused oil leaks, warning lights, and engine shaking. Repairs included pcv system, oil separator, valve cover gasket, breather pipes, and new spark plugs. - at 111,000 miles, the low-pressure fuel pump and relay failed, causing the vehicle to stall and lose all power while driving- a major safety risk. -most recently, the engine developed a severe misfire in cylinder #4. Compression testing confirmed abnormally low compression (15 psi) due to a suspected cracked valve seat. The vehicle cannot be repaired without a complete engine replacement, quoted at ~$20,000. Safety impact: - vehicle has stalled suddenly in traffic due to fuel and engine failures, risking crash or injury. - coolant and oil leaks present a potential fire hazard. - loss of power and shaking while driving put my family and others at risk. Inspection/confirmation: -all problems have been repeatedly confirmed and repaired by an independent Audi specialty service center (s&s auto repair). - numerous invoices document coolant, oil, fuel, and engine failures. Warning signs: - multiple dashboard warning lights appeared either right before or during failure, including engine malfunction, coolant loss, and auto start/stop malfunction. These repeated failures at relatively low mileage suggest a design/manufacturing defect with the Audi 3. 0t engine platform that compromises both safety and reliability. The issue seems to be widespread amongst other Audi owners with the same 3. 0t engine- per Audiworld forums.

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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.

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I am reporting a severe defect in my 2020 Audi Q7 involving “coolant migration” due to a faulty water pump, a known issue in Audi models (q7, s4, a6, 2013–2022). This poses critical safety risks due to sudden failure with minimal warning. My out-of-warranty Q7 showed minor coolant fouling near a solenoid, with normal coolant levels and no fluid added. The dealer quoted ~$6,000 to replace the water pump and vacuum system. This defect is highly dangerous due sudden power loss: coolant in the vacuum system impairs solenoids and lines, disrupting engine/turbo function. This can cause abrupt power loss, risking loss of control in traffic or at high speeds, potentially leading to collisions. Catastrophic overheating: a failing water pump may halt coolant circulation, causing rapid engine overheating without warning, risking sudden engine shutdown and stranding drivers in hazardous conditions like highways. Brake assist failure: the vacuum system powers the brake booster. Contamination can reduce braking effectiveness, increasing pedal effort and stopping distances, heightening collision risks in emergencies. Emissions control issues: coolant fouling affects pcv and evap systems, causing misfires, stalling, or increased emissions, potentially triggering check engine lights and compromising engine stability. Undetectable progression: the defect often shows no clear symptoms or warnings until severe damage occurs. My vehicle had only minor fouling that could only be detected by visual inspection, yet extensive repairs were needed, indicating the issue’s stealthy nature, which prevents timely driver intervention. Systemic issue: forums and a class-action lawsuit confirm this defect across Audi models, yet owners face high repair costs post-warranty. This defect endangers drivers and others by risking vehicle failure, impaired braking, and unstable performance. I urge NHTSA to investigate and mandate a recall or extended warranty.

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I urgently request a NHTSA investigation into systemic coolant leaks, a dangerous safety defect in Audi vehicles with the 3. 0l turbocharged v6 (ea839) engine. Affected models include the Q7 (my 2020 Q7 55 tfsi, VIN: [xxx] ), s4, s5, sq5, a6/a7, q8. These defects risk engine damage, sudden power loss, and catastrophic engine failure, endangering all road users. Many owners report premature failures of cooling components (water pump, thermostat, pcv system). Failures often occur post-warranty, costing owners over $3,000 for repairs. Online forums (audiworld, Audizine, reddit) document these widespread defects. The class action [xxx] et al. V. Volkswagen group of America, inc. Alleges water pump defects in ea839-equipped Audis (incl. Q7 up to 2022). Critical safety concerns: the primary safety risk from these coolant leaks involves: coolant ingestion: coolant enters vacuum lines, mixes with oil (faulty pcv), or enters intake (failing intercoolers). Engine malfunction: ingestion causes misfires, drivability issues, and sudden power loss during operation. Catastrophic engine failure: severe coolant ingestion can cause catastrophic engine failure, risking loss of control and collisions if the engine seizes/fails at speed. Sudden engine malfunction/failure while driving due to this systemic defect warrants immediate NHTSA investigation. Audi of America is aware. My contact (mike, ext. 43252) confirmed Audi is not addressing this widespread failure. Audi's inaction necessitates NHTSA intervention for consumer and road safety. Affected owners urge NHTSA initiate a formal investigation into systemic coolant leak issues and component failures in ea839-equipped Audi vehicles. Assess the safety risks, including potential engine failure and loss of vehicle control. If warranted, issue a safety recall for affected vehicles to prevent accidents and injuries. Public safety is paramount. Evidence indicates a defect compromising vehicle safety and reliability. Information redacted pursuant to the freedom of information.

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Pcv valve and pcv solenoid failure. Covered under an Audi extended warranty for 2013-2016, but not 2017. Exactly same failure.

We have had major problems with our 2018 Audi Q7 that are consistent with allegations made in various lawsuits against Audi and Volkswagen group of America for alleged defects with Audi piston rings and piston ring assemblies. The defects have purportedly caused excessive oil consumption, engine damage, and engine failure. As noted in one such lawsuit (that apparently settled), the engine failure caused by the defective Audi piston ring and piston assemblies could result in sudden loss of power to the engine. “it goes without saying that a sudden loss of power poses a clear-cut safety risk—it can prevent the driver from accelerating, maintaining speed, and even adequately controlling the steering wheel, engaging the brakes, all of which drastically increase the risk of collisions …” (gonzalez v. Volkswagen group of America, inc. 1:21-cv-15026) the problem with our Audi is consistent with the reports by plaintiffs in these lawsuits, as well as other Audi owners—including Q7s—who have shared their experiences online. Starting at around 60,000 miles, our vehicle increasingly consumed oil until eventually, we needed to add a quart of oil less than every 600 miles. And that’s despite our: 1) having followed all of the required oil change and other related maintenance standards published by Audi; and 2) having replaced the car’s ccv valve and pcv breather, which we were told sometimes corrects the problem. Most recently, in December 2023, I was driving with my children in the vehicle, and the engine started sputtering and laboring. Then the check engine light appeared. I was able to drive the car home but have been advised that, in order to make the car drivable, we’d have to replace the engine. Obviously, even if we have the engine replaced, the rebuilt Audi engine could have the same problems. Given the risk that the affected Audi engines will fail in vehicles traveling at high speeds on u. S. Highways, the NHTSA should investigate this matter immediately.

I got the checking engine malfunction. Took it to the dealer for dianogtic found code p052e001 pcv ( crankcase breather valve fault and it need to be replace because it also caused the emission issue). I found it was under extentison warranty to 10 year or 120000 miles , I contacted Audi and they said my VIN is not eligible to the warranty. I believed they should provide the extension warranty for all of their vehicles.

Water pump leaks because of pcv valve failure.

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Low oil light came on 3,000 miles after oil change. Noticed oil on ground under vehicle where it is parked in garage. Took it back to Audi service center and they went over it and said that it needs the pcv (pressure control valve) replaced as they have seen this in the past on similar engines and it fixes the problem. They stated that there is a valve that is not closing all the way and oil is passing through and is being consumed. They said that the new pcv has a different part number than the original pcv and is made better. If not fixed, it could lead to more expensive motor repairs. I'm having the pcv replaced tomorrow at the Audi service center for a cost of $1,700 and I hope this fixes the oil consumption. My Audi has 100,000 miles on it and I have had no other problems with it. Since they said the original part has been replaced with a "new and improved" part, shouldn't Audi recall the original pcv and offer a replacement pcv since it seems to be defective? they said they have seen this occur on similar engines which leads me to believe there are many out there that require replacement. The pcv could stay open and you lose all engine oil and then what happens when you're driving on the highway going 80 mph?.

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