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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 01-31-2013, 06:42 AM
NetBrowser07 NetBrowser07 is offline
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Tire Pressure

I'm based in south west Pennsylvania. 2008 528xi with factory run flat tires. Front tires filled to 33 psi on Tuesday (temp outside was around 51 F). All well on Wednesday (Temp outside: 62 F). Thursday morning, TPMS indicates that tire pressure is low in Front Right tire (Temp outside: 20 F).

1. Will the overnight drop of over 40F trigger this message or should I be concerned?

2. If it's just the change in outside temp, why would the warning show up just for 1 tire?

Thanks
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  #2  
Old 01-31-2013, 06:59 AM
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GOR777 GOR777 is offline
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maybe its leaking air? temperature wont effect in my opinion
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Old 01-31-2013, 07:25 AM
NetBrowser07 NetBrowser07 is offline
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Originally Posted by GOR777 View Post
maybe its leaking air? temperature wont effect in my opinion
TireRack says that a 10 degree change (lower) will cause a 1 PSI drop in pressure...

http://www.tirerack.com/tires/tirete....jsp?techid=73


Any idea why only one tire would report low?
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Old 01-31-2013, 07:32 AM
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GOR777 GOR777 is offline
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No idea, how much pressure did it lost?
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Old 01-31-2013, 07:51 AM
HPIA4v2 HPIA4v2 is offline
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Quote:
Originally Posted by NetBrowser07 View Post
I'm based in south west Pennsylvania. 2008 528xi with factory run flat tires. Front tires filled to 33 psi on Tuesday (temp outside was around 51 F). All well on Wednesday (Temp outside: 62 F). Thursday morning, TPMS indicates that tire pressure is low in Front Right tire (Temp outside: 20 F).

1. Will the overnight drop of over 40F trigger this message or should I be concerned?

2. If it's just the change in outside temp, why would the warning show up just for 1 tire?

Thanks
If you start with good set of pressure on all four and now TPMS single out one tire to be low, well I'd get my tire-pressure gauge out to make sure.
You may have nail, bend rim (with cold weather aluminum shrink creating leak) etc. Never know.
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Old 01-31-2013, 08:18 AM
NetBrowser07 NetBrowser07 is offline
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Originally Posted by HPIA4v2 View Post
If you start with good set of pressure on all four and now TPMS single out one tire to be low, well I'd get my tire-pressure gauge out to make sure.
You may have nail, bend rim (with cold weather aluminum shrink creating leak) etc. Never know.
Is there a master thread of tires (just in case I have to get new ones)... so I can see if I need all 4 (run flats) and whether I need to stick with run flats or not..
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Old 01-31-2013, 08:22 AM
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1naztyx5 1naztyx5 is offline
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Am in PA too, had same thing happen last week due to the weather. I was running late for work so I couldn't stop to put air and drove the car like that, right rear tire low, when I got to work I decided to reset the TPMS message and it cleared and is been fine since.
I checked the pressure after work that day and they were all even.
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Old 01-31-2013, 09:52 AM
HPIA4v2 HPIA4v2 is offline
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Originally Posted by NetBrowser07 View Post
Is there a master thread of tires (just in case I have to get new ones)... so I can see if I need all 4 (run flats) and whether I need to stick with run flats or not..
I'd go to tirerack website and read on thread depth, reviews etc on tires.

We are lucky enough that E60 (5-series between 2004-2010) all have spare and jack in the trunk so yes you can switch to non-RFT if you want. If you don;t want the hasle stick with RFT, it's just preference. RFT is convinient but you sacrifice cost, handling and ride quality a bit with them.

I am running summer tires Hankook V12 right now, for stagerred setup @ $800/set they are hard to beat. Just don;t drive in them during snow you'll be fine.

Also RFT seems to wear faster than regular tires, my 335i Bridgestone RFT is almost gone @22k-mile. My 535i Dunlop lasted about 28K-miles.

Last edited by HPIA4v2; 01-31-2013 at 09:53 AM.
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  #9  
Old 01-31-2013, 11:41 AM
235301 235301 is offline
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Seal may have failed. This is a regular maint item. Tire will not necessarily look flat but will register low pressure. Get it checked out. $40 fix by independent.
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