NHTSA Complaint #11689452 — 2017 NISSAN PATHFINDER

Engine failure in my vehicle equipped with the VQ35DD engine, which I believe is the result of a widespread and well-documented design defect involving internal sludge buildup. I have owned this vehicle for over five years and have followed the recommended routine maintenance schedule, including on-time oil changes using high-quality oil. At no point during any inspection, service, or maintenance appointment was I informed of any sludge buildup or concerns with the engine. Only after a serious mechanical failure did the Nissan servicing dealership claim the engine was full of sludge, subsequently recommending an engine replacement. Despite my diligence in maintaining the vehicle, I am now facing an engine replacement that was entirely unexpected and has created a safety risk due to loss of motive power. This could have resulted in a serious accident, and I believe this issue merits urgent and transparent attention. Upon researching this issue, I found dozens of similar complaints from other owners with VQ35DD engines, many of whom reported premature engine failure, sludge accumulation, and PCV system defects—despite maintaining their vehicles properly. This issue is being widely discussed on forums, including: [XXX] [XXX] It is unacceptable that Nissan has not issued a technical service bulletin, recall, or extended warranty to address this problem, particularly when it may stem from a known defect in the PCV system or engine design (such as poor oil flow, crankcase ventilation failure, or GDI-related contamination). Given the facts outlined above and the potential safety hazard, a full investigation should be taken to help Nissan customers. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)