Supposedly my '09 RX8 has a TPMS, but I have no clue where to find it. Can anyone tell me what to look for, or how to check to make sure I have it?

Thanks

 

its inside the wheels.
your tire pressure light should come on when you turn the key on.
if the tire pressure drops to low the light will come on.

 

Oh. So it won't tell you which wheel it is or anything like that? Will it light up if your pressure is too high? And do you know how accurate it is? Like within 1 or 2 psi? Or does it allow for more variation from recommended inflation?

 

it wont tell you which wheel. it will. idk. idk. I think it does.

 

The sensors are in the wheels. If you have metal valve stems you have TPMS. Rubber, no TPMS.

The light wont tell you which tire. Check 'em with a pressure gauge. Shouldnt come on if to high a pressure.

Every manufacturer sets the limits of PSI drop when the light comes on. Should be somewhere between 5-10 PSI drop.

Know this. If you have your cold tire inflation set to the specs, come winter the light may come on on cold mornings. I set mine a few PSI higher in the winter for this reason.

 

good info

 

The ECU does get a separate signal from each sensor. If you plug a good enough scanner into the OBD II port, you can read the individual tire pressures. You'd need to do a little detective work - changing the pressure one at a time - to figure out which one is on which wheel.

Ken

 

Can anyone describe what the dash light looks light? I'm not sure if I see it.

 

It doesn't tell you which wheel.

You just take your pressure gauge and check them old school style.

 

I think if the light comes on, its usually 5-10 psi below recommended, you can tell just by looking at the tires.
one of my tire was 3 psi down, the light didnt light up.

 

 

Thanks mate.

Though it's rather worthless if it only comes on at extremes.

 

well if its very sensitive, you'd be getting that light all the time. you want that?

 

Fill tires with nitrogen and don't worry about it. next time the light comes on it's cause you blew a tire.

 

It comes on if the tire is below 28 psi. It's very worthwhile as it tells you when your tire is under inflated. It is very common with large drops in temperature, like winter. That way you know to check and inflate your tires so you don't have a problem. Also useful if you pick up a nail that causes a slow or rapid leak so you don't find out when it's too late.

As far as blowing a tire on the highway...well You'll know right away anyway.

+1 in that it would be nice to have a display that tells you tire pressure for each tire +- 0.5 PSI.

 

they also report over pressure... i found out accidentally by forgetting i had intentionall put them pretty high and then ending up cruising at ~200kph for 15-20 stretch... tires heated, pressure went up, and my light came on

 

why hasnt anyone done this for the scangauge xgauges i wonder

 

Every new car in the US comes with TPMS since 2007. Its mandatory in Europe in 2012. They report both under and over pressure.

Read your manual. Dont tell me you dont have one. go get it at mazdausa.com

 

I like to fill mine with an 80% nitrogen mix.

Ken

 

$42.00 mate. I don't have that kinda money to throw out on some paper, as I'm a student. I have an electronic copy, but it's a hassle.

I'll buy one someday.

 

^ It's a hassle to read a .pdf file? Stay in college, 'cause in the real working world you'll be reading a ton of .pdf's!

 

TYPICAL!!!! its too much of a hassle to READ a pdf manual but not too much of a hassle to spend your time asking these basic questions on a forum. You want someone to TELL you instead of reading it yourself. you couldn't even be bothered to find out which light it was yourself.

PAGE 8 of the quick start guide https://www.mymazda.com/MusaWeb/pdf/...s/2009_RX8.pdf its too much of a hassle to read to page 8?

its too much of a hassle to open the manual pdf and type "tpms" into the search box?

https://www.mymazda.com/MusaWeb/pdf/...09_RX-8_OM.pdf

 

^^lol

 

Firstly, I don't have the quick start guide.

Secondly, excuse me for missing the page on the TPMS in the 430pg manual. I read through it. Missed it. Thought it wasn't there.

Thirdly, my .pdf viewer doesn't search. I know it's outdated, but legit Acrobat costs money.

Fourthly, the manual doesn't specify how precise the TMPS is.

Fifthly, thanks for being an incredible *** after everyone else kindly helped out. You represent this forum well. Please never post in my threads again. It'll save you the trouble and blood pressure.

 

FYI, Adobe Reader is free and you can get the current version from the below link (and yes it supports searching within a pdf document).

http://get.adobe.com/reader/