Find helpful customer reviews and review ratings for MOBILETRON 4-Pack 315MHz TPMS Tire Pressure Monitoring System Sensors (Clamp-in) Pre-Programmed for Lexus Scion Toyota OE Replacement TX-S008-4 at Amazon.com. Read honest and unbiased product reviews from our users.
What is TPMS?
TPMS stands for tire pressure monitoring system. As its name suggests, a tire pressure monitoring system is more than a single part. In fact, TPMS involves a valve and a sensor, and it's also important to know that not all TPMS systems are created equal.There are two kinds of TPMS technology–indirect and direct. Indirect TPMS approximates tire pressure indirectly by using data from the vehicle's antilock brake system (ABS).
Direct TPMS is a warning system that warns a vehicle's operator of an unsafe change in the air pressure in one or more of the tires. Readings are provided by pressure sensing transmitters mounted inside each tire and sent to a central computer (ECU) for display on the dashboard. A warning indicator light on the instrument panel and an audible warning notify the driver if a 25% drop in pressure occurs.
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How Does TPMS Work?
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With both direct and indirect TPMS, if a tire is detected to be underinflated by 25% or more, an alert lights up on your dashboard. But with direct TPMS, drivers are alerted sooner and if the car is equipped with the four-tire TPMS display–can even see readings for each tire. One of the largest downsides of an indirect TPMS system is that it cannot detect when all four tires are low in pressure, which can happen quite frequently if tire pressure is not checked on a regular basis.
To get a better understanding of how TPMS works and how it helps make driving safer. You can learn more about direct vs indirect systems here.
Does anybody know what Costco charges to replace TPMS sensors with their their generic ones? The sensors in my wheels are probably reaching the end of their life and I have to get new all seasons this year, figure I should probably just bite the bullet and put new sensors in.I can get OE ones for $40 a piece from Rockauto and Lexus will charge a rip-off half hour of labor to just punch the new IDs into techstream ($60-70) to program them. Of course this introduces some possible headaches (one of the sensors is defective, or costco breaks one while installing and I won't know until I've paid Lexus to program them, for example).
If costco's sensors are anywhere close to being comparable in price, installed, I'll just let them put their generic ones in but I'm not willing to pay double. Problem is that over the last two days I've been completely unsuccessful at getting somebody at the tire center there to even pick up the phone and it's not convenient for me to go over there and accost them in person.
For the record tires23 wants $360 for a set of 4 (probably generic, also) installed which is even more expensive than having Lexus do it while getting treated to lunch and espresso while I wait. Which was surprising.