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Open hood , remove neg battery cable , remove intake hose , air filter box , remove throttle body and wires , water hoses that are connected to it , remove intake manifold , there are 2 sensors under the intake , one of them is the oil press switch , other one is the knock sensor , knock sensor is the one closest to the cylinder head

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Q: How do you change the Knock Sensor for Toyota 2004 Echo?
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