11-26-2016, 11:55 PM | #24 |
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remember basic physics? cold things contract and hot things expand? same thing goes for air. when air gets cold it contracts and pressure lowers as a result.
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11-27-2016, 08:46 AM | #25 | |
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Granted, colder air contracts, but wheels and tires contract too and basic physics doesn't easily tell you which one prevails. But there's much more to it: all this tread assumes that the optimal tire pressure is independent from outside temperature - therefore, a colder temperature causes a lower tire pressure which must be corrected back to specs. Is it really so? If you start drilling into it, this assumption becomes far less obvious. Discussing this here could be off topic - but it may turn out that the OP would be better advised to just reset the TPMS and enjoy a safer winter ride! |
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11-27-2016, 09:01 AM | #26 |
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Anybody who checks their tire pressure even semi-regularly will observe tire pressure goes down when the weather turns colder. This is simple and inarguable. If it was 60 degrees last week and it's 30 degrees this week, I guarantee you your tire pressures will be a few pounds less than it was. It's simple common sense, and simple observation. Don't turn this into some esoteric discussion on physics and the ideal gas law, (unless you work for the NFL)
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11-27-2016, 01:44 PM | #27 | |
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The whole premise of this thread is that tire pressure is DEPENDENT on ambient temperature, not independent of it. |
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11-27-2016, 04:07 PM | #28 | ||
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All the above, just trying to give a break to our OP - he came here asking a simple question and has essentially been declared unworthy of a BMW ownership! |
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11-28-2016, 02:54 PM | #29 |
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Same thing happened to my 328i today. Apparently this low tire pressure problem when the temp drops is pervading the entire BMW brand...
<disengage sarcasm>
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11-28-2016, 04:00 PM | #30 |
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Guys,
Question, today I was driving in my X5 and I got this loud "ding" sound and a bright orange "low fuel" warning message came up in the display. Is this bad? I think it may be time to just trade this thing in... Sorry I don't have a pic.
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artem123248.00 Class5Kayaker52.00 |
11-28-2016, 05:03 PM | #31 | |
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1. Position one foot on each pedal 2. Turn iDrive 3 steps right, 4 steps left, push twice 3. This activates pedals-to-xDrive emergency link 4. Start pedalling 5. Push SOS button to enact the "Eins, zwei..." voice prompt for optimal pedalling rhythm 6. Max seat ventilation will kick in after one minute 7. Do not use Launch Control in this configuration Please keep us posted! |
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11-28-2016, 11:16 PM | #32 | |
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One of the following scenarios came to mind, in which case, he probably deserves everything he got:
Next thing we'll see is a check control message that an oil change is due, with the same "is this bad" question. BTW, loved your response to the low fuel light post... genius, and feebly copied above. |
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11-29-2016, 04:10 AM | #34 |
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Hey man,
I'm loving the digital dashboard! Did your x5 come with that? Cause I know I have the most updated x5 which is a 2017.. Do I have to buy this dashboard separately? |
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11-29-2016, 08:57 AM | #35 |
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Did he do a retrofit? Even '17 US-spec don't have the digital clusters as an option.
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11-29-2016, 01:33 PM | #37 | |
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I made a comment stating that it seemed a bit high, and he said that the tire said to pump to a max of 55psi, and he thought he would just give it a little wiggle room. I asked if that's what his car asked for, mentioning the common door sticker, and he confirmed. When he got in his car, I pointed to the sticker that stated 32psi and he responded "Well, I guess I'm a little high then, huh?" and then he drove off.
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11-29-2016, 07:52 PM | #39 |
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How exactly?
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11-30-2016, 02:56 AM | #41 | |
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Good catch regarding the OP. App doesn't show location. Maybe a Canuck that crosses the border often? Speedo ring shows km, but digital readout is in miles.
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A little mod here, a little mod there...
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