Vehicles using 3UZ-FE engine list:

Engine 3UZ-FE is known for reliability but can face issues like oil leaks from valve cover gaskets and timing belt wear. Diagnose leaks by inspecting gasket areas and check timing belt condition regularly, especially after 90,000 miles. Prevent problems with timely oil changes using high-quality synthetic oil and replace the timing belt and water pump as per manufacturer intervals to avoid failure. Some owners report VVT-i actuator noise; resolving this may require cleaning or replacing the actuator. Regularly monitor coolant levels and engine temperature to prevent overheating. Addressing these proactively ensures longevity and smooth performance in the Lexus models equipped with the 3UZ-FE engine.