lost one valve cap, Tire Low warning

akak1997 · 11-12-2008, 11:24 AM

This morning when I start my car, I got the Tire Low warning. Went to check all tires (visually coz I lost the gauge long time ago), all seems fine. Then I found out the front passenger side tire valve cap is missing. Could loosing a valve cap throw the Tire Low warning? The one I've is the OEM valve cap, they look weird for valve cap, is it a sensor? I thought the 1er TPMS is inside the tire.

thanks

mikead_99 · 11-12-2008, 12:43 PM

Decent stem caps typically have an o-ring to help keep the air in since the valves in the stems aren't perfect.....eh, OK, just went and looked, ours do too. That probably explains it.

akak1997 · 11-12-2008, 01:18 PM

I don't have my manual with me, how do you reset the tire pressure warning?
thanks!

lannypoffo · 11-12-2008, 06:11 PM

i replaced all those crappy plastic caps with metal BMW ones. never saw a tire light once.

Mad Dragon · 11-12-2008, 06:40 PM

Those metal caps will eventually rust to the valves. That's why BMW uses plastic. I've seen it happen. Needing a pair of vice grips to check someone's tires isn't fun.

akak1997 · 11-12-2008, 09:08 PM

Thanks for the replies. I just got home and got a gauge, checked out all the tires, they're all at 33psi. Just did a reset. gonna go drive around a bit and see if it comes back.

I think I'm gonna replace them with those with BMW Roundel caps. I live in SoCal, we don't even know what raining is, and we sure won't get any salt on the road

11-12-2008, 11:24 AM	#1
akak1997 Major 64 Rep 1,159 Posts Drives: BMW 135 @ 135mph Join Date: Aug 2008 Location: Los Angeles iTrader: (2) Garage List 2008 135i [0.00]	lost one valve cap, Tire Low warning This morning when I start my car, I got the Tire Low warning. Went to check all tires (visually coz I lost the gauge long time ago), all seems fine. Then I found out the front passenger side tire valve cap is missing. Could loosing a valve cap throw the Tire Low warning? The one I've is the OEM valve cap, they look weird for valve cap, is it a sensor? I thought the 1er TPMS is inside the tire. thanks
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11-12-2008, 12:43 PM	#2
mikead_99 Second Lieutenant 6 Rep 201 Posts Drives: 08 SMG 135i Join Date: Nov 2007 Location: NoVA iTrader: (1)	Decent stem caps typically have an o-ring to help keep the air in since the valves in the stems aren't perfect.....eh, OK, just went and looked, ours do too. That probably explains it. __________________ 135i ....
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11-12-2008, 01:18 PM	#3
akak1997 Major 64 Rep 1,159 Posts Drives: BMW 135 @ 135mph Join Date: Aug 2008 Location: Los Angeles iTrader: (2) Garage List 2008 135i [0.00]	I don't have my manual with me, how do you reset the tire pressure warning? thanks!
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11-12-2008, 06:11 PM	#4
lannypoffo Lieutenant 20 Rep 564 Posts Drives: 2013 Dodge Charger SRT8 Join Date: Aug 2008 Location: Cali iTrader: (1)	i replaced all those crappy plastic caps with metal BMW ones. never saw a tire light once.
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11-12-2008, 06:40 PM	#5
Mad Dragon . 27 Rep 932 Posts Drives: 2010 GTI Join Date: Mar 2008 Location: MD iTrader: (0)	Those metal caps will eventually rust to the valves. That's why BMW uses plastic. I've seen it happen. Needing a pair of vice grips to check someone's tires isn't fun.
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11-12-2008, 09:08 PM	#6
akak1997 Major 64 Rep 1,159 Posts Drives: BMW 135 @ 135mph Join Date: Aug 2008 Location: Los Angeles iTrader: (2) Garage List 2008 135i [0.00]	Thanks for the replies. I just got home and got a gauge, checked out all the tires, they're all at 33psi. Just did a reset. gonna go drive around a bit and see if it comes back. I think I'm gonna replace them with those with BMW Roundel caps. I live in SoCal, we don't even know what raining is, and we sure won't get any salt on the road
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