Can someone tell me what the correct tire pressure is because my Z is telling me its low. Also, when it has the two pressure readings, which one is for the left tire and which one is for the right. Thanks!

 

Look at the sticker inside your door panel. I believe its 35psi for the 18's.

 

Yup, 35 psi. If I remember correctly, the top is the drivers side and bottom is the passenger side.

 

Top number is right tire, bottom number is left. I found this out when I had a slow leak in one tire. I was surprised because somehow I had expected it to go in order left, right but it's the other way around.

 

This is wrong. It depends on how you set up your sensors. Do a search in here and you will see. Basically, how would the system know if you accidently switched your wheels when you got new tires???

Mine was the opposite. I discovered this after I bought a nice digital pressure sensor, (which you should use anyways. I would never use the built in sensors as a reliable source. Mine are about 1.5psi off anyways.) But they are good for unexpected leaks and flats...

 

Ive been wondering about this too. my door jam says 35psi but on the tires it says 45psi. my sensors say 44psi. my tires are the stock Potenzas that came with the car. 2005 Touring.

 

I can totally see someone driving down the road and getting a flat tire and being like "WTF?? why didn't the sensor tell me my tire was low?". They get out and change the tire. Just as they are about to finish up the sensor warns them of a low tire. That would be so friggin funny!

 

The number embossed into a tire is the maximum pressure, not the recommended pressure for your car. After all, how would Bridgestone know that the tire in going on a Z or any other particular car.

At 44psi, that's got to be a pretty hard ride. Also, keep in mind that as they heat up, the pressure rises. Mine are set cold to 35 (cold is when you're supposed to check and fill a tire) but if I take it out on the highway they will easily hit 40psi.

 

So on a stock z, the top number is the drivers side tire?

 

There is no garentee. Just go get a gauge and figure it out. It can be different on every car. Is this really that difficult?

 

It can't be different unless you've moved the TPS sensors from one wheel to another or swapped wheels from one side to another. The calibration procedure for the sensors involves using Consult II to identify the ID number from each sensor and associate it with a specific location (FL, FR, RL, RR). It should be the same on any car unless somebody has mucked with them.

 

On my model - 35 lb recommended for both front and rear. Getting either too high or too low pressure can affect ride and wear. For Christmas I've asked Santa for some of those - wear and read gauges for my tires! How often I look at my tires - and say "too low" - check them and they are o.k. A slow leak can turn into a flat too easily.