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#1
11-23-2011, 06:10 PM
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Speedometer error?
The good news is that this may have saved me a speeding ticket or two... The bad news is this; My X5 is showing 127,xxx miles on the odometer. Because the speedometer is faster than the truck and is racking up miles even faster, that means that it should have only have 115,xxx miles on it! 12k miles will certainly have an impact on the resale value; I feel like I have been robbed. 
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 2010 X5M Active Autowerks tune 22" BBS SV in Titanium Gunmetal Black grills
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#2
11-23-2011, 06:39 PM
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Old and ubiquitous observation: do speedo on Search Tab...pages of threads.
Yes, it is usually about 4-6 mph off what is indicated. (I can't recall the usual/exact % of optimism, but many have noticed it.) The odo is supposedly on the nutz. GL, mD
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Ol'UncleMotor From the Home Base of Pro Bono Punditry and 50 Cent Opins... Our Mtn Scenes, Car Pics, and Road Trip Pics on Flickr: http://www.flickr.com/photos/4527537...7627297418250/ http://www.flickr.com/photos/4527537...7627332480833/ http://www.flickr.com/photos/45275375@N00/ My X Page 
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#3
11-24-2011, 12:14 AM
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yep done the same and with the same results, however for me it is only the speedo that is off, the odometer seems to be accurate, as to the average speed on the OBC.
if you reset the speed while maintaining a constant road speed the OBC shows the real speed while the speedo shows a lower reading
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#4
11-24-2011, 12:30 AM
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My error is 3 mph at 80, GPS measured. Everything I've read says that odometer is right, mine seems to be. My 2010 e60 had larger error, about 6 mph at 80. It was annoying, so I put on tires just a skosh bigger and got it right on.
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2013 X5M - Sapphire Black 2006 X5 4.4i - Sapphire Black 2002 M3 Euro - Alpine White 2003 M5 - TiAg 2003 M3 - TiAg 2010 535i - Deep Blue Metallic 2007 530i - Deep Green Metallic
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#5
11-24-2011, 02:04 AM
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BMW spec is maximum error of 2.4 mph + 10% on the high side, 0 on the low side. Odometer does not have 'correction' built into it like the speed indication does. All has to do with guaranteeing no under-reading with any combination of tires, plus manufacturing tolerances. Over reading is thus intentional.
Links here with previous discussions, and a link to the BMW service document covering this: http://www.xoutpost.com/810962-post5.html
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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