Where is the ect sensor located in a Mazda3 2007?

In a 2007 Mazda3, the ECT (Engine Coolant Temperature) sensor is typically located near the engine block, often on the cylinder head or near the thermostat housing. To access it, you may need to remove some components, depending on your engine configuration. It's usually a small sensor with an electrical connector attached to it. Always refer to the vehicle's service manual for specific details and procedures.