It depends on which of them. The one for coolant is located in the water inlet. Ambient temperature sensor is located in the filter box.
The Knock sesor is located on the backside of the block right underneath intake manifold.
The 2006 Toyota coolant temperature sensor is located on the front of the engine. The coolant temperature sensor will be a few inches above the thermostat housing.
The coolant temperature sensor on a 2001 Toyota RAV4 is located on the exhaust manifold. It is on the driver's side of the manifold.
It is located on the bottom of the radiator
The intake air temperature sensor is located on top of the intake. In a 1990 Toyota Camry the air temp sensor assures the ECU the engine is running at optimal temperature.
The termostat housing
On the throttle body.
Somewhere under the hood!
The coolant temperature sensor can be found on the front of the engine, near the thermostat. Remove the coolant temperature sensor retaining nut, to replace it.
the sensor is right next to a radiator cap at the bottom of the neck.
It is located in the thermostat housing on top of the motor.
The automatic transmission oil temperature sensor on a 1992 Toyota Land Cruiser is in the engine compartment. it is near the inlet/outlet tubes.