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Volkswagen sold cars with defective engines and then refused to fix them

Volkswagen Sold Cars With Defective Engines and Then Refused to Fix Them

The Non-Financial Ledger: What It Actually Feels Like to Own This Car

Maria Lydia Martinez bought a brand-new 2023 Volkswagen Tiguan on November 25, 2022, from an authorized VW dealership in Snellville, Georgia. She paid full price. She was told it was safe and reliable. She drove it off the lot with a factory warranty promising that any defect in materials or workmanship would be repaired free of charge for four years or 50,000 miles.

She made it roughly 2,500 miles before a warning light appeared on her dashboard telling her the engine oil was critically low. She was not overdue for an oil change. She had not been racing it or abusing it. She had simply been driving a car she trusted.

She took it back to the dealership. They added oil and told her it was normal. She drove it another 2,000 miles. The light came back on. She returned. They added oil again. Still normal, they said. Another 2,000 miles. Same warning. Same trip to the dealer. Same answer. This happened seven times in the first 13,000 miles of ownership. Seven separate service visits. Seven explanations that the engine consuming its own oil faster than most people check it is simply how Volkswagen engines work.

Think about what that actually means for a person. You buy a new car because you need it to be reliable. Maybe you commute. Maybe you have kids in the backseat. Maybe you drive on a highway where pulling over on the shoulder is genuinely dangerous. Now imagine that car can silently run out of oil at any point between your service visits, with no predictable schedule, and that the manufacturer’s response to this problem is to hand you a paper towel and a funnel and tell you to check it yourself.

Martinez is not alone. The NHTSA complaint database is full of people who went through the same cycle. A driver in Nevada was told by a Las Vegas VW dealership that adding oil every 3,000 miles is just how the car works. A driver in New Hampshire sat in the dealership waiting room and listened to the service advisor give the exact same speech to another customer who happened to overhear the conversation. A 2018 Tiguan owner was working from home during COVID, driving “very minimally,” and still burned through oil fast enough to trigger the low-oil light after just 1,000 miles of driving. A mechanic with ASE certification owned one of these vehicles, confirmed through professional knowledge that this pattern is not normal, and was told by VW that the oil consumption test showed the car was functioning within acceptable limits.

That is the experience Volkswagen sold and the experience Volkswagen defended. What makes it worse is the word “normal.” VW’s dealers used it so consistently and so uniformly that it could not have been accidental. The company had internal documentation going back to 2008 acknowledging this exact pattern of complaints. They had a Technical Service Bulletin that documented it. They updated that TSB four times across sixteen years, each time expanding its coverage to include newer and newer model years. And every single time, under the field labeled “Product Solution,” they wrote two words: “Not applicable.”

There is a particular kind of betrayal in being told that the problem you are experiencing is normal when the company telling you that has spent sixteen years writing memos about it. It means your concern was never going to be heard, because the company’s official position is that there is nothing to hear. You take time off work to go to the dealership. You wait. You explain the problem. You are reassured. You drive home with an engine that is going to do the same thing again in 2,000 miles. And somewhere, in an office building in Herndon, Virginia, someone already knows.


How the Engine Is Designed to Work — and What VW Got Wrong

The EA888 is a four-cylinder turbocharged direct-injection engine. The lawsuit’s technical description of how it is supposed to function makes the defect easy to understand for anyone who has never looked under a hood.

  • Each cylinder contains a piston that moves up and down, converting the force of exploding fuel into rotational motion. Three rings circle the piston to manage two things: keeping combustion pressure inside the cylinder, and keeping engine oil out of it.
  • The top two rings are compression rings. They press against the cylinder wall and create a seal so the explosive force of ignition stays in the right place. On the turbocharged EA888, this seal is especially critical because the engine operates under higher-than-average pressure to achieve its power output.
  • The third ring is the oil control ring. Its job is to scrape excess oil off the cylinder wall on the piston’s downward stroke, leaving only a thin lubricating film. This is what prevents oil from entering the combustion chamber and burning.
  • In the defective EA888 engines, the piston rings have insufficient tension. They cannot maintain proper contact with the cylinder wall. The result: oil passes through the seal, enters the combustion chamber, and burns alongside the fuel mixture. It does not leak out onto the driveway. There is nothing visible to warn the driver. The oil simply disappears.
  • Once the oil level drops low enough, the engine’s remaining oil is spread too thin across too many moving surfaces. Metal contacts metal. Components wear faster. If the oil drops far enough, the engine can seize while the vehicle is in motion at any speed on any road.
Figure 1: How the Defective Piston Ring Allows Oil Into the Combustion Chamber EA888 CYLINDER CROSS-SECTION: THE OIL BURN PATHWAY Cylinder Wall PISTON Compression Ring 1 Compression Ring 2 GAP Oil Control Ring (Insufficient Tension — DEFECTIVE) COMBUSTION CHAMBER Oil burns here with fuel → smoke, emissions, oil loss CRANKCASE (Blow-by gases collect here) Unburned gases leak into crankcase PCV system vents to atmosphere

Sixteen Years of Knowing and Doing Nothing: VW’s Internal Paper Trail

The lawsuit does not speculate about when VW first knew. It cites specific internal documents with dates. Those documents tell a story the company clearly hoped would stay internal.

  • December 10, 2008: VW issued Technical Service Bulletin No. 17-08-03, covering 2000 through 2010 model year vehicles. The bulletin acknowledged customer complaints of “high oil consumption” that may exceed VW’s own acceptable standard. VW required dealers to contact its Technical Assistance Center before performing any oil consumption repair. The “Product Solution” section stated: “Not applicable.”
  • November 5, 2020: VW revised the same TSB as No. 17-18-06, expanding coverage to 2000 through 2021 model year vehicles. The updated bulletin added instructions for inspecting for oil leaks before conducting consumption tests. The “Product Solution” section still stated: “Not applicable.”
  • March 14, 2022: VW updated the TSB again to cover 2000 through 2022 model year vehicles. The word “Tiguan” now appeared in the coverage list for the specific model years at issue in this lawsuit. Product Solution: “Not applicable.”
  • September 18, 2024: VW updated the TSB a fourth time, expanding coverage through 2025 model year vehicles. Sixteen years after the first bulletin. Still no solution.
  • The complaint notes that preparing and releasing a TSB requires VW to first collect warranty data from dealers, compile consumer complaint records, investigate the engine issue, and coordinate internally. That process takes time. The December 2008 TSB therefore represents knowledge VW possessed before December 2008. This problem predates the 2022-2023 Tiguan by well over a decade.
  • Federal law under the TREAD Act (Pub. L. No. 106-414) requires automakers to report safety-related defects to NHTSA and to monitor NHTSA complaint databases as part of their Early Warning Reporting obligations. VW had a legal duty to track these complaints and act on them. The complaint alleges VW did track them and chose not to act.
Figure 2: VW’s Internal Knowledge Timeline vs. Consumer Harm Timeline DEC 2008 TSB 17-08-03 issued “No Fix” 12 years NOV 2020 TSB revised, expanded to 2021 “No Fix” 16 mo. MAR 2022 Covers 2022 Tiguans “No Fix” 2.5 yrs SEP 2024 Covers thru 2025 models “No Fix” JAN 2025 Class action lawsuit filed 16+ Years of Documented Knowledge. Zero Product Fixes. Tiguan complaints begin appearing publicly: June 2022
“VW considers it acceptable for their cars to burn through a quart of oil every 1,000 miles.” A service advisor said this to a customer with a car that had fewer than 16,000 miles on it.

Legal Receipts: What the Court Filing Actually Says

The following are direct quotes from the class action complaint filed January 8, 2025, in the U.S. District Court for the District of New Jersey (Civil Action No. 2:25-cv-00191). These are not paraphrases. These are the specific legal allegations and verbatim consumer testimony submitted as evidence.


What VW Told You vs. What Was Actually Happening

Figure 3: What Was Claimed vs. What Was Hidden WHAT VW TOLD YOU (At point of sale and at the dealership) THE REALITY (What the internal documents show)
“The 2023 Tiguan is a safe, reliable, and high-quality vehicle.” (Dealership representations at point of sale)
VW’s own TSB from 2008 already documented the engine’s tendency to consume excessive oil across its entire product line.
The oil consumption warning is “normal” for Volkswagen engines. (Repeated by dealers at every service visit)
The consumption results from defective piston rings with insufficient tension — a manufacturing defect, not a design standard.
Adding oil during service visits constitutes warranty repair. (Dealerships presented oil top-offs as warranty service)
Topping off oil addresses the symptom only. The defective piston rings remain in place. The engine continues burning oil on the next drive.
The New Vehicle Limited Warranty covers defects in materials or workmanship for 4 years / 50,000 miles. (Warranty booklet provided at purchase)
VW refused to perform an actual repair under this warranty. No recall was issued. No adequate repair procedure was sent to dealers. The complaint alleges a direct breach of this warranty.

Societal Impact Mapping: The Wider Damage

Public Health

The defective piston rings do not just consume oil. They alter how the engine burns fuel, producing a measurable increase in emissions that enter the air everyone breathes.

  • Defective piston rings allow high-pressure combustion gases to escape past the piston into the crankcase. These gases include unburned hydrocarbons, carbon monoxide, and oxides of nitrogen. They are vented into the atmosphere through the vehicle’s Positive Crankcase Ventilation (PCV) system on every drive.
  • The loss of compression caused by failed rings produces incomplete combustion of the air-fuel mixture, generating higher levels of carbon monoxide and unburned hydrocarbons at the tailpipe. These are regulated pollutants with documented public health effects: carbon monoxide displaces oxygen in the bloodstream; hydrocarbons are a precursor to ground-level ozone, which triggers respiratory distress.
  • Oil that enters the combustion chamber burns alongside fuel and produces blue-gray exhaust smoke containing partially burned fuel, oil particles, and fine particulate matter. Fine particulates (PM2.5) penetrate deep into lung tissue and are associated with cardiovascular disease, asthma exacerbation, and premature death, according to EPA documentation.
  • Blow-by gases from defective rings recirculate through the PCV system back into the intake, disrupting the air-fuel ratio and causing repeated incomplete combustion cycles. This is a continuous emissions amplification loop, not a one-time event.
  • The complaint specifically notes NHTSA complaints describing “blue puffs of smoke” at startup and “abnormal white smoke” from the exhaust — both documented symptoms of oil combustion that are visible indicators of the above emissions harms occurring in real-world driving conditions.

Economic Inequality

The financial damage from this defect lands hardest on people who bought the car because it was supposed to be affordable and reliable transportation.

  • VW sold the 2022-2023 Tiguan as a mainstream family SUV, priced to compete in a segment where buyers are often making a significant financial stretch. These are not luxury vehicle buyers who can absorb unexpected recurring costs. They are ordinary consumers who financed a car based on representations about its quality.
  • VW’s warranty covers repairs but not the oil itself. Owners forced to add oil every 2,000 miles are paying out of pocket for a consumable their car should not be consuming. One NHTSA complaint describes a dealer in New Hampshire advising the customer to “add oil which is coming out of my pocket vs. theirs under warranty.” The cost of oil adds up continuously over months and years of ownership.
  • An engine that is chronically low on oil experiences accelerated wear on its internal components. Bearings, camshafts, and cylinder walls that are not properly lubricated degrade faster, leading to repair bills that can reach thousands of dollars and that fall outside the warranty if the vehicle reaches 50,000 miles before the catastrophic failure manifests.
  • One NHTSA complainant calculated the projected ownership cost of their affected 2022 Tiguan as “over $1,000 per mile to own” — a sardonic assessment that reflects genuine financial despair, not hyperbole.
  • The class action complaint notes that the diminished value of the vehicles is a documented harm. Cars with known or suspected engine defects are worth less on resale. Owners who try to trade in or sell their affected Tiguan absorb that loss directly in the form of lower offers or difficulty finding buyers.
  • Owners in lower-income brackets who cannot afford to monitor their oil between every 2,000 miles, or who do not have the mechanical knowledge to recognize the warning signs, face a higher risk of engine failure and total loss of the vehicle — a catastrophic financial event with no recourse from VW.

The “Cost of a Life” Metric: What VW Chose to Save

Figure 4: NHTSA Complaint Volume Over Time — 2018 to 2024 Tiguan Models 5 4 3 2 1 Complaints Cited Year Filed with NHTSA (from complaint citations) 2 2020 1 2021 4 2023 1 Late 2023 5 2024 Based on 15 NHTSA complaints directly cited in the class action complaint. Actual total complaints are higher.

What Now? How to Act on This Information

The lawsuit is in its early stages. The class has not yet been certified, and no damages have been awarded. Here is where accountability can come from and what you can do right now.

Corporate Roles Named in the Complaint

  • Volkswagen Group of America, Inc. is the named defendant. Its corporate headquarters is in Herndon, Virginia. It is incorporated in New Jersey. It markets, distributes, and warrants all VW-brand vehicles sold in the United States.
  • The complaint names no individual executives by name. Accountability targets are: VW’s warranty division leadership, the technical teams responsible for TSB issuance and product solutions, and the executive layer responsible for the decision not to issue a safety recall.

Regulatory Watchlist

  • NHTSA (National Highway Traffic Safety Administration): The federal agency with authority to investigate safety defects and compel recalls. The TREAD Act already obligates VW to disclose known safety defects to NHTSA. File a complaint at safercar.gov if you own an affected vehicle. Your complaint adds to the public record and the Early Warning database NHTSA uses to trigger investigations.
  • FTC (Federal Trade Commission): Has jurisdiction over deceptive trade practices at the federal level. The alleged conduct — marketing vehicles as safe and reliable while concealing a known defect — falls within the FTC’s unfair or deceptive acts or practices authority.
  • State Attorneys General: The Georgia Fair Business Practice Act is specifically cited in this lawsuit. State AGs have authority to investigate and pursue consumer protection violations independently of federal action. If you are in Georgia, contact the Georgia Office of the Attorney General. If you are in another state, contact your own AG’s consumer protection division.
  • Consumer Financial Protection Bureau (CFPB): Relevant if you financed the vehicle and believe you were sold a defective product under a financing arrangement based on misrepresented vehicle quality.

What You Can Do

  • If you own a 2022 or 2023 Volkswagen Tiguan: Check your oil every 500 to 1,000 miles regardless of what your service schedule says. Do not wait for the warning light. The defect makes the light an unreliable safety indicator because oil levels can drop below safe operating thresholds before the sensor triggers.
  • Document everything: Keep records of every dealer visit, every oil top-off, every service invoice, and every communication with VW or its dealers about this issue. Written documentation is what makes you a viable class member and what fuels further litigation and regulatory investigation.
  • File an NHTSA complaint: Go to safercar.gov and submit a vehicle safety complaint. This is free, takes less than ten minutes, and directly contributes to the federal record that NHTSA uses when evaluating whether to open a defect investigation or order a recall.
  • Connect with the class action: The lawsuit was filed by Lemberg Law, LLC, 43 Danbury Road, Wilton, CT 06897, phone (203) 653-2250. Class action websites like ClassAction.org maintain a searchable database where you can track this case and find information about joining the class.
  • Mutual aid and community: Owner forums like vwvortex.com and the r/Tiguan subreddit on Reddit are already organizing around this issue. Connecting with other owners gives you real-world repair intelligence, shared documentation strategies, and collective pressure on local dealers who are insulated from accountability when they deal with consumers one at a time.
  • Share this story: VW’s concealment strategy depends on owners believing they are alone and that the problem is normal. Spreading verified, sourced information directly undermines that strategy. The more owners who know, the harder it becomes for VW to maintain the “normal” narrative at the dealership counter.

The source document for this investigation is attached below.

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Aleeia
Aleeia

I'm Aleeia, the creator of this website.

I have 6+ years of experience as an independent researcher covering corporate misconduct, sourced from legal documents, regulatory filings, and professional legal databases.

My background includes a Supply Chain Management degree from Michigan State University's Eli Broad College of Business, and years working inside the industries I now cover.

Every post on this site was either written or personally reviewed and edited by me before publication.

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