Audi owners say faulty EA839 V6 water pumps can leak coolant badly. Some repairs reportedly exceeded $6,000 once warranty coverage expired. Plaintiffs allege Audi knew about the issue but never warned buyers. Water pumps aren’t exactly the kind of component that gets enthusiasts fired up. Nobody hangs posters of them on bedroom walls, and nobody shows up at Cars & Coffee asking what seal material your coolant module uses. But if a new lawsuit is accurate, a tiny part buried deep inside Audi’s twin-turbo V6 lineup could turn into a wallet-emptying nightmare. A newly filed class action lawsuit claims Audi’s EA839-family 2.9-liter and 3.0-liter engines suffer from defective water pumps that can fail prematurely, potentially leading to coolant leaks, contamination, overheating, and in severe cases, engine damage. Read: Audi Knew Its Door Locks Could Trap Drivers In Or Leave Cars Unlocked, Lawsuit Claims The lawsuit covers a long list of vehicles stretching across much of Audi’s lineup, including the A4, A5, A6, A7, A8, Q7, Q8, SQ5, S6, S7, and RS5 models from the 2018 through 2024 model years. What The Lawsuit Actually Alleges According to the filing seen by Carcomplaints, the issue isn’t about a tiny, sporadic coolant leak. Plaintiffs allege that the coolant module’s seals, housing, and internal parts degrade prematurely under totally normal operating temperatures. After that begins, the coolant evidently leaks into the vacuum system and other components and begins to wreak havoc. Obviously, owners aren’t going to notice a tiny leak when it first begins. By the time warning lights illuminate or coolant levels drop enough to trigger concern, plaintiffs argue damage may already be underway. The suit also alleges the problem can affect turbochargers. There’s not a single car made in this century with turbochargers that are super cheap to replace at the dealer. The Owners Footing The Bills Two owners are leading the case. One California owner says his 2019 Audi A6 needed a water pump, PCV valve, and vacuum system replacement after a mechanic found coolant leaking into vacuum hoses. Audi allegedly declined assistance because the car was out of warranty, leaving him with nearly $6,000 in repair bills. A second plaintiff with a 2021 SQ5 says his coolant warning light appeared at roughly 62,000 miles. After warranty coverage expired, he says Audi refused help, and he ultimately paid over $1,400 for repairs. The lawsuit claims Audi knew of the issue as early as November 2018 and concealed the alleged defect while continuing to sell affected vehicles. At this point, it’s up to Audi and VW to respond to the lawsuit or move to dismiss it. We’ll keep you updated here as the case unfolds, as it could affect plenty of owners.
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