TPMS accuracy

MikeBeemer · 08-02-2016, 02:06 PM

I noticed there is a slight difference between my digital readout of tire pressure and car's TPMS of about +/- 1.5 p.s.i. Anyone else experience this?

Billfitz · 08-02-2016, 02:19 PM

Mine is dead on with a standard tire pressure gauge.

fshubert · 08-02-2016, 02:22 PM

My TPMS is very close to my mechanical gauge.

MikeBeemer · 08-02-2016, 02:41 PM

Does a +/- 1.0 psi make a big difference in tread life?

Billfitz · 08-02-2016, 02:47 PM

Quote:

Originally Posted by MikeBeemer

Does a +/- 1.0 psi make a big difference in tread life?

Not really, I get at least that much variation between cold versus warm tires. You should get a mechanical tire pressure gauge and see if that agrees with the TPMS. If so toss the digital.

XRAVE · 08-02-2016, 03:23 PM

maybe .2-.3 off. Tires jump 1-2 PSI when hot.

bad karma · 08-02-2016, 04:32 PM

Be careful, I've heard that if your tire pressure is off by 1.5PSI you will lose control of your M4 leaving Cars and Coffee.

MikeBeemer · 08-02-2016, 07:09 PM

hilarious bad karma!

apocalypsbe · 08-04-2016, 06:27 AM

Quote:

Originally Posted by MikeBeemer

I noticed there is a slight difference between my digital readout of tire pressure and car's TPMS of about +/- 1.5 p.s.i. Anyone else experience this?

I had a warning last week that my tire pressure was slightly off. So I kept an eye on it while driving but didn't see anything to be honest, looked fine, kept the screen on while driving and saw that it changes according to temperature but in the end I just reset the values since they were fine to get rid of the warning ... I didn't noticed any significant difference though in terms of readout.

08-02-2016, 02:06 PM	#1
MikeBeemer Private 19 Rep 68 Posts Drives: 2016 428iGC Join Date: Jun 2016 Location: Miami iTrader: (0)	TPMS accuracy I noticed there is a slight difference between my digital readout of tire pressure and car's TPMS of about +/- 1.5 p.s.i. Anyone else experience this?
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08-02-2016, 02:19 PM	#2
Billfitz Lieutenant General 8243 Rep 16,081 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	Mine is dead on with a standard tire pressure gauge.
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08-02-2016, 02:22 PM	#3
fshubert Captain 89 Rep 710 Posts Drives: 2015 F30 335i Join Date: Sep 2009 Location: Northwest NJ iTrader: (0)	My TPMS is very close to my mechanical gauge. __________________ 2018 Mustang GT \| Royal Crimson \| Black Leather \| 6-speed \| Cold Weather \| Premium Pkg \| 20" Alloy Wheels \| Tuned to 510HP \| Less than $45K Previous loves: 2015 F30 335i / 2013 F30 335i / 2009 E90 335i / 2007 E90 328xi
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08-02-2016, 02:41 PM	#4
MikeBeemer Private 19 Rep 68 Posts Drives: 2016 428iGC Join Date: Jun 2016 Location: Miami iTrader: (0)	Does a +/- 1.0 psi make a big difference in tread life?
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08-02-2016, 03:23 PM	#6
XRAVE Member 458 Rep 1,517 Posts Drives: 135i Join Date: Sep 2013 Location: Miami, Florida iTrader: (0)	maybe .2-.3 off. Tires jump 1-2 PSI when hot. __________________ Previous: 2013 135i Space Grey w/Coral Red \| 6 Speed MT \| M Pkg \| JB4 \| AA Downpipes \| AA Exhaust \| Previous: 2015 M3, BSM[/SO/CF \| DCT \| Adaptive M \| 19" Black \| CF Roof \| Previous: 2018 M2, AW \| DCT \| Exec Pkg Current 2020 X7 50i
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08-02-2016, 04:32 PM	#7
bad karma Captain 445 Rep 752 Posts Drives: 2015 328i F31 M-Sport Join Date: Jun 2014 Location: Portland, OR iTrader: (0)	Be careful, I've heard that if your tire pressure is off by 1.5PSI you will lose control of your M4 leaving Cars and Coffee. __________________
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08-02-2016, 07:09 PM	#8
MikeBeemer Private 19 Rep 68 Posts Drives: 2016 428iGC Join Date: Jun 2016 Location: Miami iTrader: (0)	hilarious bad karma!
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