Nissan VC-Turbo Engine Defect Lawsuit: Rogue, Altima, and QX50 Owners Explained

Four vehicle owners filed a class action lawsuit against Nissan North America, Inc. and Nissan Motor Co., Ltd. on July 8, 2025, alleging the company knowingly concealed a dangerous defect in its VC-Turbo engines and sold hundreds of thousands of defective vehicles across the Nissan Rogue, Nissan Altima, Infiniti QX50, and Infiniti QX55 model lines. The 96-page complaint, filed as Becker et al. v. Nissan of North America, Inc. et al., Case No. 1:25-cv-00845, is pending before Judge Richard G. Andrews in the U.S. District Court for the District of Delaware.

The lawsuit arrived one week after Nissan issued NHTSA Recall No. 25V-437, covering 443,899 vehicles with defective VC-Turbo engine bearings. Plaintiffs argue the recall remedies are inadequate. They allege Nissan knew about the defect as early as 2019 but concealed it, denied it to customers, and forced owners to pay out-of-pocket repair costs that often ran into thousands of dollars. The case is ongoing as of 2026.

Nissan VC-Turbo Engine Lawsuit Timeline and Updates

2019 — VC-Turbo Technology Debuts in Altima and QX50

Nissan introduced the Variable Compression Turbo engine, marketed as a breakthrough in automotive engineering, with the 2019 Nissan Altima and 2019 Infiniti QX50. The technology was designed to dynamically adjust its compression ratio, balancing fuel economy against performance demands in real time.

Nissan marketed the VC-Turbo engines as delivering higher power and better fuel efficiency than conventional fixed-compression engines. The KR15DDT three-cylinder 1.5-liter and KR20DDET four-cylinder 2.0-liter engines were positioned as flagship technology. The lawsuit alleges that from this launch year onward, Nissan received internal signals, warranty data, and early consumer complaints indicating the variable compression system was failing in the field.

December 2023 — NHTSA Opens Formal Investigation

The National Highway Traffic Safety Administration opened a formal safety investigation in December 2023 after accumulating owner complaints about engine knock, metal shavings found in oil pans, and complete engine failures in VC-Turbo vehicles. The investigation focused on the bearing components in the KR15DDT and KR20DDET engines.

NHTSA identified that engine bearing failures were “not typically instantaneous” but tended to progress over time, allowing metal debris to accumulate in the engine oil before catastrophic failure occurred. The regulator received multiple Product Information Requests from Nissan as the investigation advanced through 2024 and into 2025.

June 27, 2025 — Nissan Issues NHTSA Recall 25V-437

Nissan issued its first formal recall on June 26, 2025, officially recorded by NHTSA on July 1, 2025, as Campaign No. 25V-437. The recall covered 443,899 vehicles with manufacturing defects in their VC-Turbo engine bearings, affecting main, A-, C-, and L-link bearings that could seize and release metal debris into the engine oil.

The recalled vehicles were: 2021-2024 Nissan Rogue, 348,554 vehicles; 2019-2022 Infiniti QX50, 84,536 vehicles; 2019-2020 Nissan Altima, 5,685 vehicles; 2022 Infiniti QX55, 5,124 vehicles. All had production dates between October 6, 2017, and August 1, 2024.

The recall remedy required dealers to inspect the engine oil pan for metal debris. If debris was found, Nissan would repair or replace the engine at no cost. For vehicles with the 1.5-liter engine and no debris detected, dealers would replace the oil pan gasket, change the engine oil, and reprogram the Engine Control Module software. For 2.0-liter engines with no debris, only an oil change was required. Owner notification letters were scheduled to mail beginning August 25, 2025.

July 8, 2025 — Class Action Lawsuit Filed in Delaware

One week after Nissan’s recall announcement, four plaintiffs filed Becker et al. v. Nissan of North America, Inc. et al. in the U.S. District Court for the District of Delaware. The lead plaintiff, Dennis Becker, was joined by Jean Coney, Gabrielle Wrigley, and Vicki Laquidara. Judge Richard G. Andrews was assigned the case.

Plaintiffs were represented by three law firms: Smith, Katzenstein & Jenkins LLP (Kelly A. Green and Jason Z. Miller); Capstone Law APC (Abigail Gertner, Cody R. Padgett, and Nathan N. Kiyam); and Milberg Coleman Bryson Phillips Grossman PLLC (Adam A. Edwards, Will A. Ladnier, and Virginia Ann Whitener).

The 96-page complaint alleged violations of the Magnuson-Moss Warranty Act and consumer protection statutes in multiple states, including the New York General Business Law, the Florida Deceptive and Unfair Trade Practices Act, and the Missouri Merchandising Practices Act. The complaint demanded a jury trial.

July-August 2025 — Case Procedural Filings

Nissan entered its appearance in the case on July 30, 2025, represented by Renee Dudek. The parties filed a stipulation extending Nissan’s deadline to respond to the complaint. The court ordered Nissan’s answer due September 8, 2025.

February 2026 — Recall Expanded to 2023-2025 Rogues

Nissan issued two additional recalls in February 2026, designated R25E2 and R25E3, expanding the affected vehicle pool significantly. The new recalls covered approximately 323,917 Nissan Rogue vehicles from model years 2023-2025 equipped with the 1.5-liter KR15DDT VC-Turbo engine.

Nissan’s investigation between August 2025 and February 4, 2026, identified elevated engine oil temperatures under certain operating conditions as a key failure mechanism. By the time of this expansion, Nissan had confirmed 690 warranty claims for engine failures on 2023 and 2024 Rogue models. NHTSA had received three additional Product Information Requests from Nissan about bearing seizures and abnormal engine noise in 2023-2024 Rogues. Nissan scheduled owner notification letters to mail on March 27, 2026. Combined with the original 25V-437 recall, the total affected vehicle count reached well past 760,000 U.S. vehicles.

What the Lawsuit Alleges

The complaint’s central claim is straightforward: Nissan knew the VC-Turbo engines were defective before the vehicles were first sold, chose to conceal that knowledge, and continued selling vehicles it knew could fail dangerously while in motion.

The defect, according to the complaint, originates in the variable compression system itself. The system regulates piston strokes to adjust the engine’s compression ratio. When the main bearings and lower-link components fail, they cannot withstand the heat and pressure of normal operation. Bearing material degrades and releases metal shavings into the engine oil. Contaminated oil accelerates internal engine wear. The process can escalate from subtle noise to complete engine seizure.

Plaintiffs allege Nissan’s knowledge of the defect came from multiple internal sources: pre-production testing data, consumer complaints logged after launch, warranty repair records from dealerships, and internal analyses of production and complaint issues. Despite that knowledge, the complaint alleges, Nissan “regularly denied the defect’s existence until after the expiration of the five year/60,000 mile Nissan New Vehicle Limited Warranty Powertrain Coverage,” leaving customers to absorb repair costs that should have been covered under warranty or a timely recall.

The complaint also challenges the recall remedy itself. Plaintiffs argue that for most owners, the recall amounts to an oil change, which does not address the underlying defect. For owners who receive replacement parts under the recall’s engine replacement provision, plaintiffs contend those parts are “equally defective,” meaning the fix does not fix the problem.

Affected Vehicles and Engine Models

Symptoms Owners Have Reported

The complaint and NHTSA complaint database describe a consistent symptom pattern across affected vehicles. Owners report hearing knocking or high-pitched whirring noises from the engine, which may begin faintly and intensify over weeks or months. Hesitation during acceleration is common, along with rough idling at stops.

More serious symptoms include excessive oil consumption, a check engine warning light, sudden loss of engine power while driving at highway speeds, and complete engine stalling without warning. In the most severe reported cases, the engine seized entirely, leaving drivers stranded in traffic or on highways with no ability to restart the vehicle. NHTSA has confirmed that failed bearings can detach components, damage the engine block, and allow engine oil to leak onto hot surfaces, creating a fire risk in addition to the collision hazard from sudden power loss.

Infiniti discontinued the QX50 and QX55 models entirely after the recall came to light. Nissan dropped the VC-Turbo engine from the Altima starting in 2025, limiting the ongoing production exposure.

Why the Recall Is Not Enough, According to Plaintiffs

The recall addresses a symptom, not the defect, plaintiffs argue. For most affected owners, the remedy is an inspection and oil change. If metal debris is not yet present in the oil pan at the time of the inspection, the dealership performs minor maintenance and returns the car. The bearings remain. The variable compression system that caused the bearing failures remains. The owner drives away in the same vehicle with the same underlying engineering problem.

For the subset of owners whose oil pan inspection reveals metal debris, Nissan will replace the engine. But plaintiffs contend the replacement engines use the same defective VC-Turbo design, making engine-for-engine swaps a circular remedy. Nissan estimates that only approximately 0.6% of vehicles in the bearing recall will require a full engine replacement, a figure plaintiffs argue underestimates the real scope of failure.

The lawsuit also presses on the years-long gap between when Nissan allegedly first knew about the defect and when the recall was issued. Owners who paid thousands of dollars for engine repairs between 2019 and 2025, during which time Nissan allegedly denied the defect’s existence, received no compensation through the recall. The class action seeks to recover those out-of-pocket costs in addition to any future damages.

Who Qualifies to Join the Lawsuit

The class is defined broadly to include current and former owners of 2021-2023 Nissan Rogues, 2019-2023 Nissan Altimas, and 2019-2023 Infiniti QX50 vehicles equipped with KR15DDT or KR20DDET engines. The case is in active litigation, and the class has not yet been formally certified by the court.

Owners who experienced engine problems and paid for repairs out of pocket, including those who were denied warranty coverage for VC-Turbo related failures, are potential class members. Vehicle owners who experienced sudden power loss, engine noise, or complete engine failure may have claims regardless of whether they have already had their recall service completed.

Lemon law claims may offer a faster alternative for some owners. California’s lemon law, and similar statutes in other states, provides relief for vehicles that have undergone a reasonable number of repair attempts without resolving a defect that substantially impairs use, value, or safety. An attorney specializing in automotive defect litigation can advise on whether lemon law or class action participation better fits a specific owner’s situation.

What This Lawsuit Teaches Consumers

The Nissan VC-Turbo engine case follows a pattern that automotive defect litigation has repeated for decades. A manufacturer introduces new technology, markets it aggressively as innovative and reliable, receives early internal signals that the technology is failing, and then faces a choice: disclose the problem immediately, at great cost, or manage it quietly for as long as warranty periods and regulatory pressure allow.

Nissan chose the second path, according to the complaint. The result was six years between the technology’s launch and the first recall. Six years during which owners paid for engine repairs Nissan allegedly knew should have been covered. Six years during which vehicles with a documented safety hazard continued to be sold to new buyers who had no idea the engine could fail at highway speed.

The recall expansion to over 760,000 vehicles as of February 2026 confirms the scale of the problem. The NHTSA investigation that preceded the recall began in December 2023, four years after the first affected vehicles were sold. That gap represents the regulatory timeline Nissan navigated before mandatory action. The class action represents the consumer accountability mechanism that exists outside of that regulatory process.

Owners of affected vehicles should verify their VIN at nhtsa.gov/recalls and contact an authorized Nissan dealer to schedule their recall service, regardless of their decision on the class action. The recall repair is free. The lawsuit’s outcome could determine whether owners who already paid thousands in repair costs before the recall was issued receive any reimbursement.

This case mirrors what plaintiffs in similar automotive defect litigation have argued for years, including in cases tracked alongside the Home Depot pricing lawsuit, where systematic concealment of known problems from consumers formed the core of the legal theory. The Chobani yogurt lawsuit also addressed the gap between what a manufacturer knows and what it tells consumers, as does the Olaplex lawsuit, where concealed ingredient risks caused harm to consumers who trusted the brand’s safety claims. The pattern is consistent: when companies suppress known product defects rather than disclose them, the eventual legal reckoning tends to far exceed the cost of early disclosure.