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Old 11-27-2012, 07:32 AM
wleighton wleighton is offline
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Location: Scotch Plains, NJ
 
Join Date: Nov 2007
Posts: 8
Mein Auto: 2000 528i, 2001 Z3
Can only speculate on what caused original problem.

But losing 10 pounds in a week in a run flat is typical of a slow leak, typically a nail or screw still stuck in the tire. I've had mixed results with getting this fixed. Some dealers will plug/patch a puncture in a run flat, others won't and will only replace the tire.

As far as checking tire pressure regularly the TPMS does this. And you'll notice that when the outside temperature drops 10-15 degrees, the TPMS will come on identifying some or all of the tires as low. In the old days when cars went in for service every 3000 miles, the tire pressure would get checked regularly. Now with extended service intervals, it's not getting checked as often. While annoying at times (it always seems to come on when you're running late for an appointment or the weather is cold and miserable), the TPMS is a good thing.
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