Image Credit: Audi Pressroom.Audi is facing yet another legal battle over alleged cooling-system problems, and this one could affect a massive number of vehicles powered by the company’s EA839 V6 engine family. A newly filed class action lawsuit claims certain Audi models suffer from defective water pumps that can leak coolant internally and potentially trigger expensive engine damage.The lawsuit targets both the 2.9-liter and 3.0-liter versions of Audi’s EA839 engine, which has been used across a huge portion of the brand’s lineup since the 2018 model year. According to the complaint, the issue stems from premature failure of seals, housings, and internal components inside the coolant module and water pump assembly.Plaintiffs allege the defect can allow coolant to seep into the vacuum system and surrounding components, contaminating systems that were never designed to handle fluid exposure. In some cases, the lawsuit claims the resulting problems can include overheating, damaged PCV systems, turbocharger issues, and potentially catastrophic engine failure.AdvertisementAdvertisementThe lawsuit also accuses Audi of knowing about the alleged defect for years while customers were left paying repair bills that can easily climb into the thousands once factory warranties expire.A Long List Of Audi Models Are IncludedImage Credit: Audi.The class action covers a broad range of Audi vehicles sold in the United States between the 2018 and 2024 model years. The lawsuit was filed in the U.S. District Court for the District of New Jersey under the case Larr, et al., v. Volkswagen Group of America, Inc., et al.According to the plaintiffs, Audi allegedly became aware of the issue as early as November 2018 but failed to properly disclose the risks to owners or extend warranty coverage to address the problem proactively.The affected models are:AdvertisementAdvertisement2018-2024 Audi A42018-2024 Audi A52018-2024 Audi S5 Cabriolet2018-2024 Audi S5 Sportback2018-2024 Audi RS 52018-2024 Audi SQ52019-2024 Audi A62019-2024 Audi A72019-2024 Audi A82019-2024 Audi Q82019 and 2021-2024 Audi RS 5 Sportback2020-2024 Audi A6 Allroad2020-2024 Audi S62020-2024 Audi S72020-2024 Audi Q72020-2021 Audi A8 e quattro2021-2024 Audi SQ5 SportbackOwners Say Repairs Quickly Become ExpensiveThe lawsuit centers around two plaintiffs who say they were forced to pay large repair bills after their vehicles developed coolant leaks outside the warranty period.California owner Doug Larr says his 2019 Audi A6 was diagnosed with a leaking water pump during a routine oil change in March 2026. According to the complaint, the leak contaminated the vacuum hose system and required replacement of the water pump, PCV valve, and associated vacuum components.Because the car was outside Audi’s factory warranty coverage, Larr reportedly paid nearly $6,000 out of pocket for repairs performed by an independent mechanic.AdvertisementAdvertisementNew Jersey plaintiff Kaelin Crawford tells a similar story involving a 2021 Audi SQ5. The lawsuit says the SUV developed a coolant warning light at roughly 62,000 miles, with technicians later diagnosing a leaking water pump near the PCV system.An Audi dealership allegedly quoted Crawford roughly $2,800 for repairs, though he eventually completed the work through an independent mechanic for approximately $1,460.Complaints About EA839 Cooling Systems Have Been GrowingImage Credit: Audi.The lawsuit arrives after years of complaints from owners involving coolant leaks and water pump failures tied to EA839-powered vehicles.Several complaints posted through the National Highway Traffic Safety Administration describe failures occurring well before 50,000 miles. Some owners claim they were denied warranty assistance despite relatively low mileage and recurring cooling-system issues.AdvertisementAdvertisementAudi has also issued technical service bulletins related to coolant loss and warning-light concerns affecting multiple EA839-equipped models. One bulletin reportedly published in late 2025 references coolant leaks and illuminated coolant or engine warning lights.The lawsuit argues the problem is especially dangerous because owners may not immediately notice internal coolant leaks until damage has already spread through surrounding systems.Another Headache For Audi OwnersUnfortunately, cooling-system failures are not uncommon among modern European luxury vehicles, especially as engine packaging becomes tighter and systems become more complex. Still, the scale of the EA839 engine’s usage across Audi’s lineup makes this particular lawsuit potentially significant.The EA839 family powers everything from mainstream luxury sedans to high-performance RS models, meaning a widespread defect could affect a huge number of owners across multiple price segments.AdvertisementAdvertisementAudi has not publicly admitted wrongdoing regarding the lawsuit, and the claims remain allegations at this stage. Still, owners of affected models may want to monitor coolant levels carefully and pay close attention to warning lights or unexplained coolant loss.Catching a leak early could make the difference between a relatively straightforward repair and a much larger engine-related bill later on.If you want more stories like this, follow Guessing Headlights on Yahoo so you don’t miss what’s coming next.
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