Oem or aftermarket tpms sensors for 2nd set of wheels?

Just wondering what you guys have used and where you bought them?

 

24/7 TPMS direct fit and inexpensive.
I have used both older and newer replacements from them.
Vince

 

i got a whole set for 180 from discount tire installed

 

Thanks. Cool, and after you but them in the new rims/tires, how do you sync them to the car? Or do they just work?

 

http://www.oewheelsllc.com/

I bought a set of Seimens tpms from them for $117 shipped. They were the same as the ones that were on my main set. I had them installed yesterday for $10 each. The tire placed used a tpms activation tool on them.

 

they wake up the sensors with the machine or they automatically do it them selfs aswells after 15 mins of continuous driving of 15 mph or more

 

Cool, looks like part # is A0009054100

 

i went to tires plus and they said they couldn't install sensors because they had to be programmed by the dealer. Can we do this programming ourself?

 

lol nonsense

oewheels.net (oewheels.llc) gives you a set of four for $112. Absolutely nothing needed to get them up and running. 2007 GL450.I bought five and had to add $10 for shipping.

 

I always use the OEM that came with the car; had them since 2012 with no issues.

 

How would I install them?

 

Nice! Unfortunately mine are giving me issues

 

Tires have to be dismounted.

However, they don't have to be re-balanced. So it's like $10 per each.

TPMS live about 10 years. So if you're within tire lifetime of 10 years, change them when you change tires.

If your tires are near end of life, I'd just live with the TPMS error.

 

Or you could just not install the sensors and have someone with a MB Star turn the system off, this extinguishing the warning light in the dash.
You'd be on the hook for checking your tire pressures regularly.

Flame away.

 

do you need STAR to do that?

 

Flame? Why? We'd love to go back to the days of NOT obsessing about TP's!

 

Correct, you'd need some DAS compatible tool to program out the TPMS function in the Central Gateway Module. I've done it to both my 07's - mostly because I air down on some rougher surfaces and don't want to stare at a yellow light when I do, and didn't want to pay the extra $$ for the sensors.

FYI I believe TPMS like systems were required by law for 08 model year and up so tire shops are legally obligated to sell you TPMS or decline you service.

 

Nah, you can flame all you want, STAR or no.

 

Would it work to simply keep four TPMS units in your glove box? Do they only transmit when they are rotating?

 

Unless you kept them stored in some kind of pressurized vessel, they'd report ambient pressure and trip the light.
I don't know if they're always on or if the car sends a wakeup signal on the working frequency as part of startup.
I do know that it takes 30 minutes from when a sensor has failed to when the light and message will trip, so there is some periodicity to checking if the sensors are still there and operating.
Now, that's not to say that it takes 30 minutes from a loss of pressure incident to the report. That's instantaneous.

 

Okay, I'm officially retarted for not thinking of that.

The wikipedia article says the simpler TPMS only transmit when rotating. I guess their signal is a simple "pressure okay", at least in the 07 GL. Since the system doesn't know which tire is low, I guess it also just looks for four different signals, expecting them on fixed intervals (30 minutes? When I air down, I get the error messages much sooner than that.)

It's possible the sensors send a "low battery" signal on the 30-minute interval. The "low pressure" signal may be a discrete signal, or simply no signal at all.

There is a more sophisticated variety that have two-way communication. Since the GL system is crude (doesn't know which tire), I assume it's receive only.

Edit: A lot of crummy articles. Here is a better one: https://www.brakeandfrontend.com/dec...reless-signal/

Also note the GL has both an indirect (comparative wheel speeds) and direct (in-wheel module) TPMS. The former is the little orange light looking like a tire cross section, while the latter turns the center display red.

 

I think it knows which tire since each sensor has a discrete code and each can be read in Das - but that information doesn’t make it to the dash light or to the error message.

 

I bought one off Amazon...is there a specific coding or programming procedure or should I just have a tire shop install it and it will sync up itself?

 

Interesting. I think the problem is that the firmware has no way of assigning a code to a wheel position.

In a way, it's a good thing. I rotate my tires all the time - I have five wheels and rotate them through - and I'd go nuts if I had to reassign transmitter IDs each time.

 

Nope. The system just looks for four transmitting sensors.