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      03-12-2017, 09:05 PM   #1
joemulder
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F10 (2014) 535i xdrive tire pressure

hi all,

I found out today that one of my tire valve stem caps was stolen..

when I get home, I checked the tire pressure , I realized all 4 tires are low.

I was about to refill the tire, but on the user guide. it says

"The displays of inflation devices may under-read by up to 1.45 psi/0.1 bar"

I was just wondering should I refill the tire to 35psi(front) 39psi(rear) minus 1.45 PSI?

Thanks!!

also , what does OEM tire air valve stem cap looks like?
Mine has N2 written on the top, black cap. plastic.
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Last edited by joemulder; 03-12-2017 at 09:21 PM.
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      03-12-2017, 11:39 PM   #2
lsturbointeg
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first, what PSI are you currently reading?
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      03-13-2017, 08:44 AM   #3
joemulder
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Quote:
Originally Posted by lsturbointeg View Post
first, what PSI are you currently reading?
32.4 32.5 (front)
33.1 33.4 (rear)
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      03-13-2017, 03:03 PM   #4
Gilgorm
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Your tires are likely low due to the cold temperatures today.

Fill the tires to the manual / door jamb sticker recommendations and check them with a good quality tire gauge that every car owner should have.
If possible they should be filled when still cold. I have a small compressor that I use in my driveway so the tires are always stone cold.
You should check your tires every month or before a long trip. I'm lax myself in this regard plus its damn cold out.
The 1.45 reading seems like a red herring to me--how do you know which inflating device is inaccurate? Use your own gauge.
I would rather fill up the tires using my gauge (if on a trip), drive home and let the tires cool down and then check them with my own gauge again for the best accuracy. A small variance to the upside is probably better than a variance to the downside when it comes to pressure.
35/36 fronts and 39 rears sounds right.
You'll need to re-check the tires once the weather warms up in the spring (if it ever arrives).
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      03-13-2017, 04:05 PM   #5
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Very common issue here as several members including myself
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