FTM feature
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Joined: Aug 2004
Posts: 1,107
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From: Quincy, MA, USA
My Ride: E60 530i
Model Year: 2004
Engine: M54
I replaced all 4 tires in my 2005 530i last November due to the inspection failure. The rear 2 tires exposed the wire mesh inside the rubber due to bimmer's negative wheel camber. When tire guy took out the old tire, I did not see any pressure monitor device in the rim. How does our FTM work then ?
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Joined: Jul 2007
Posts: 1,100
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From: Saint Louis, Missouri, USA
My Ride: 2010 535i M Sport 6MT
Model Year: 2010
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Joined: May 2009
Posts: 10,496
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From: SoCal
My Ride: 2008 550I LOADED, all options except HUD and NV
It uses sensors to monitor rotational mass, when that changes (due to loss of pressure) you get a warning. The sensor is not located on the wheel, that would be TPMS. I think it uses the ABS sensors but not 100% on that. 
That is why when you reset you should be rolling so that the sensor can get a baseline of the rotational mass of the wheels/tires and set accordingly.
That is why when you reset you should be rolling so that the sensor can get a baseline of the rotational mass of the wheels/tires and set accordingly.
Thread Starter
Contributors
Joined: Aug 2004
Posts: 1,107
Likes: 0
From: Quincy, MA, USA
My Ride: E60 530i
Model Year: 2004
Engine: M54
Thread Starter
Contributors
Joined: Aug 2004
Posts: 1,107
Likes: 0
From: Quincy, MA, USA
My Ride: E60 530i
Model Year: 2004
Engine: M54
It uses sensors to monitor rotational mass, when that changes (due to loss of pressure) you get a warning. The sensor is not located on the wheel, that would be TPMS. I think it uses the ABS sensors but not 100% on that. That is why when you reset you should be rolling so that the sensor can get a baseline of the rotational mass of the wheels/tires and set accordingly.
That is why when you reset you should be rolling so that the sensor can get a baseline of the rotational mass of the wheels/tires and set accordingly.
Contributors
Joined: Dec 2007
Posts: 5,972
Likes: 0
From: The State of Southern NJ!
I replaced all 4 tires in my 2005 530i last November due to the inspection failure. The rear 2 tires exposed the wire mesh inside the rubber due to bimmer's negative wheel camber. When tire guy took out the old tire, I did not see any pressure monitor device in the rim. How does our FTM work then ?
http://www.5series.n...s_Manual_US.pdf
Flat Tire Monitor - The concept
The Flat Tire Monitor keeps track of the inflation pressures in the four mounted tires as you drive. The system provides an alert whenever the inflation pressure drops significantly in relation to the pressure in another tire. In the event of a pressure loss, the rolling radius and therefore the rotation speed of the wheels change. This change is detected and is reported as a flat tire.
Contributors
Joined: May 2009
Posts: 10,496
Likes: 2
From: SoCal
My Ride: 2008 550I LOADED, all options except HUD and NV
Contributors
Joined: Dec 2007
Posts: 5,972
Likes: 0
From: The State of Southern NJ!