What is an Evaporator Temp Sensor? and about the Japanese Inspection...

I have the part # as 2108300572

What is it? My dealer recommended replacing it ...
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Anyway it is time for the dreaded 2 year Japanese SHAKEN where many of the dealers and independents take the opportunity to screw their customers.

How much do you ask?
FIRST - gotta pay - 90,000YEN in more or less tax.

SECOND - gotta pay - 50,000YEN to the dealer to do the inspection.
This fee is a little high, but OK.

THIRD - Repairs - the Goldmine ...
We started with an estimate for 190,000YEN and are now at 30,000YEN - (brakes and fluid).
Obviously some of their customers just say OK and pay the 190,000YEN.

So obviously I do not trust the service advisor.... I just really do not know what the Evaporator Temp Sensor does, so I wonder whether it should be replaced or not.

I love the scene in the movie FARGO when the salesman is selling the Clearcoat! These guys are just like that!

Thanks Gary