Seller likely is misinformed, or has no clue altogether.
The only difference I am aware of, when it comes to those sensors, at least from a physical standpoint, is that early model year offerings were secured with two individual screws. One on either side.
Starting around that 2013 model year, the bean counters began monkeying with various things. Trying to cut costs wherever.
As such, the sensor in that year had a guide pin that protruded vertically out of/from the top of the intake plenum. FMC then used one screw to hold it down instead. Yes, one screw.
That's how ridiculous it became. Cost of one screw, at 'X' amount of units produced/sold.
I can't imagine it saved them all that much.
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