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7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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Old 10-03-2012, 01:54 PM
RTGrove RTGrove is offline
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Location: Lake County, IL
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Mein Auto: 2006 750 Li
FTM fault tolerance?

Hi all,
One of my front tires has developed a bubble on the sidewall. Probably going to replace it, but the tires are about a year old (summer tires only, so maybe 8k-10k miles on them?)

My car has the FTM, and Im wondering how much size difference the system can tolerate (i.e. worn vs new tires) before setting off an error? Tire rack can shave the new tire to match the good one on the other side, but not sure if i need to go through that?

So, does anyone know how many 32nds of an inch it can tolerate difference without an error?

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Old 10-03-2012, 05:38 PM
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csmeance csmeance is offline
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Location: Daytona Beach
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Mein Auto: 760Li
the FTM system has a reset button on it in your idrive to where it can learn the rate at which tires spin when properly inflated. Inflate your tires properly (including the new one) and press the reset option. As you drive it'll learn the new rates and then become active! FTM is pretty good in this sense!
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