Perhaps, but TPMS also costs lawyers, the health care system, and auto repair shops money. Those who do not check their pressure will have more accidents, blown tires, hospital trips, etc.

Suppose you pick up a screw that causes your tire to go from 30 psi to 15 psi as you are driving. Are you really going to pick that up on your own? Will you admit that TPMS will pick that up faster than you can?

You can get (4) TPMS sensors for 2009 Honda Fit for $107.16 + $7.63 shipping = $114.79 from rockauto.com.

 

Thanks for the rock auto price on TPMS sensors. You appear to have misunderstood the reason for my post. I am not down on TPMS- I agree that they are a benefit while also being a PITA for people who do a lot of wheel swapping. I also agree that a slow or a fast leak from a puncture would become obvious much faster with TPMS than by eye or by feel unless you were to check your tire pressure before each drive. I was being sarcastic regarding the "conspiracy theorist" view of pollution controls, ethanol in fuels, and mandated safety measures in new car designs.

Your addition of another inexpensive TPMS source is appreciated, but I am betting that major tire service businesses will probably offer lower prices in package deals where they provide the replacements sensors and installation. It will probably cost more to buy the sensors yourself then take them to a tire shop for installation and re-programming. When '08 and '09 Fits hit age 9 or 10 and the TPMS sensors start to fail, someone will surely post about those costs.

 

As far as the TPMS part. Am I correct to say from the first link what you need to look for is just part 42753-TR3-A81 ?

Then with a google search for that part number,

It seems the MSRP of this genuine Honda part is $37.12 each, and you can often find it discounted for around $26 each or from your favorite forum-related sponsor.

Just a data point to keep in mind.

 

Wow! I was right. My local Costco tire shop says (these are today's prices, and will obviously change to some degree over the years to come):

If buying new tires and TPMS sensors also need replacing, sensor price is zero (free).
If replacing failed sensors and remounting the same older tires, sensor replacement price is a whopping $17.00. If you are a Costco customer, it would be silly to buy the sensors anywhere but the Costco tire shop where parts and labor are far less than parts alone bought anywhere else.