replacing air intake sensor

My 1.5 Dci 82hp has a broken air intake sensor. Measuring a constant of -40 degrees, the fan never starts rotating.

I found out that this sensor is located in the throttle body, am I correct? Is it possible to only fit a new sensor or should I replace the whole body? As in the past I've had other fault codes (there were erased by a service mechanic, and are not coming back with the exception of p0089) should it be wise to replace it all?

Does anyone know where I can buy all of this, considering that I live in the Netherlands? :)
 
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