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This EGR valve was installed primarily to improve fuel efficiency and thermal efficiency, but when the vehicle is driven too much, it can cause malfunctions due to the accumulation of sludge, etc. For this reason, cleaning the entire mechanism is important, so we carried out some maintenance this time. We also provide detailed explanations of the key points of the work, suitable tools, and replacement parts. #prius30#priusα#prius30#EGR valve cleaning#PCV valve replacement#intake manifold cleaning