TPMS sensors, how do they work?

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Old Sep 24, 2017 | 09:25 PM
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TPMS sensors, how do they work?

Hi Guys,

I'm getting winter tires mounted on a different set of wheels for my 2011 G37x sedan so I can spare my OEM wheels from the harsh Canadian winters.

The wheels don't have TPMS sensors. I have some questions I'm hoping I can get some help with:
  1. Is the part number I found the right one? part# 40700-1LA0A
  2. New vs used sensors, is there anything I should know?
  3. I've seen a process on this forum to "reset" the sensors but does that work with new/used sensors that have never been used on my car? Or do they need to always be programmed for my car?
Thanks.

2011 Infiniti G37x sedan
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Old Sep 24, 2017 | 10:13 PM
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Here's a link from Bridgestone - scroll down to direct TPMS.

https://www.bridgestonetire.com/trea...how-tpms-works

Typically not much of a price difference between new and used OEM sensors - purchased OEM Honda sensors last year@ $25 ea.

They do need calibrated - here Discount Tire doesn't charge extra (besides installing) but I don't know about other retailers.

-Eric
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Old Sep 24, 2017 | 10:57 PM
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Like you, I've got 2 sets of wheels. I bought a used set of OEM sensors for the second set.

If you do the same, be mindful that age, and I believe mileage, have impact on sensors' lifetime (battery). Think I recall reading that sensors transmit signal based on wheel rotation, so higher mileage means more signals sent means battery was used more. And time degrades the battery's ability to hold charge (prob much less of a factor, though).

Read problems with aftermarket ones, which is why I stuck to OEM (but new from dealer is $$$)
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Old Sep 25, 2017 | 06:39 AM
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Originally Posted by llebcire
Here's a link from Bridgestone - scroll down to direct TPMS.

https://www.bridgestonetire.com/trea...how-tpms-works

Typically not much of a price difference between new and used OEM sensors - purchased OEM Honda sensors last year@ $25 ea.

They do need calibrated - here Discount Tire doesn't charge extra (besides installing) but I don't know about other retailers.

-Eric
Interesting. So sensors from other cars can be compatible with our cars or were you buying for your Honda?
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Old Sep 25, 2017 | 06:49 AM
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Originally Posted by STownSaint
Like you, I've got 2 sets of wheels. I bought a used set of OEM sensors for the second set.

If you do the same, be mindful that age, and I believe mileage, have impact on sensors' lifetime (battery). Think I recall reading that sensors transmit signal based on wheel rotation, so higher mileage means more signals sent means battery was used more. And time degrades the battery's ability to hold charge (prob much less of a factor, though).

Read problems with aftermarket ones, which is why I stuck to OEM (but new from dealer is $$$)
Great info, thanks. May I ask where you found your OEM sensors? Ebay?
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Old Sep 25, 2017 | 12:12 PM
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Originally Posted by Alagator28
Interesting. So sensors from other cars can be compatible with our cars or were you buying for your Honda?
Possibly as Honda doesn't make them and yes I was buying specifically for the Accord EXVL Coupe I traded for my G37.

-Eric
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Old Sep 25, 2017 | 04:43 PM
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Originally Posted by Alagator28
Great info, thanks. May I ask where you found your OEM sensors? Ebay?
No prob...bought mine in FS section of this site.

Also, there were a few different types of OEM TPMS over the years, I suggest you call a dealer with your VIN so they can give you which part numbers are compatible with your car.

And a shop shouldn't charge more than $20 to program the TPMS...the tool is pretty cheap and can be done in minutes.
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Old Sep 26, 2017 | 01:07 AM
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Originally Posted by STownSaint

And a shop shouldn't charge more than $20 to program the TPMS...the tool is pretty cheap and can be done in minutes.
The tool is pretty cheap? Really? Define cheap and show us where this cheap tpms reprogram tool can be purchased
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Old Sep 26, 2017 | 09:10 AM
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Originally Posted by qmantran
The tool is pretty cheap? Really? Define cheap and show us where this cheap tpms reprogram tool can be purchased
Just Google it. They can be found for as cheap as $130 at least that is what I saw. If you are a shop and charging $20 for a reset, you can make that back in a couple of days or worst case a few weeks.

As a consumer, if you purchase one and your local shop charges $20, you only have to use it 7 times to get your money back. I would agree that is pretty cheap. Just my $.02
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Old Sep 26, 2017 | 06:28 PM
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Originally Posted by qmantran
The tool is pretty cheap? Really? Define cheap and show us where this cheap tpms reprogram tool can be purchased
Lol you OK, man?
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Old Sep 26, 2017 | 07:21 PM
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Originally Posted by STownSaint
No prob...bought mine in FS section of this site.

Also, there were a few different types of OEM TPMS over the years, I suggest you call a dealer with your VIN so they can give you which part numbers are compatible with your car.

And a shop shouldn't charge more than $20 to program the TPMS...the tool is pretty cheap and can be done in minutes.
Thanks. Called the dealer to confirm the part number and found 4 used on eBay for $60 with guarantee. Fingers crossed!
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Old Sep 26, 2017 | 09:47 PM
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Originally Posted by STownSaint
Lol you OK, man?
At work we use either our scan tool or the Snap-On TPMS programmer. Both of which run easily over $1,000.

When he mentioned there was a 'cheaper' alternative it caught me off guard.

A quick search lead me to a $120 "Autel TS408" unit. Skimming through the description it says

The MaxiTPMS TS408 is a new generation base model TPMS tool, which is designed to activate all known TPMS sensors, read sensor ID, pressure, temperature and battery condition, program AUTEL MX-sensors and provide on-tool relearn procedure.
If I'm reading that correctly, you must buy a Autel TPMS sensor for that tool to be able to program it to your vehicle. Doesn't seem like you can use OEM or any aftermarket sensors UNLESS it's a "Autel" branded TPMS sensor with that tool.
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