I have a question on this too. I have the original sensor and the car has 186xxx milea on chassis so most likely i should replace it? I checked the ohms and i was getting 1500-1600 i couldnt get it anywhere near 1 or OL

i just changed the origonal one which is at 135k miles and it was crap. the spring dident really have much force it wasent performing properly, yours being more miladge is probably worse off. I would replace it, for 70$ its not a bad investment

The thing with the TPS is that it's a potentiometer with resistance material laid down on a wafer in a steadily increasing density. A bad TPS may read fine as far as the resistance measure at the top and bottom but as the material wears down it wears down in between those extremes the most. The most effective way to measure it is to bench test it and test that the voltage output at pin VTA is linear and consistent from .48v to ~4.85v.

The TPS like the N/A's VAFM is a wear component which sees a lot of action. Replacing it every 75,000 to 100,000 miles is not excessive... if you don't want to, or are unable to, test it thoroughly.