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X1 E84 (2011 - current)
The new to the US BMW X1 will arrive at BMW dealers in the fall of 2012 as a 2013 model year. Get your X1 28i with either sDrive (RWD) or xDrive (AWD) or get the US exclusive I6 N55 powered X1 35i dDrive.

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  #1  
Old 08-27-2013, 06:10 AM
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edx1 edx1 is offline
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How far off is your speedometer?

On my 35 with staggered (option 323 wheels) it appears the speedometer is off a fair bit, about 5% actually.

At gps speed of 130mph it reported 137, at 75 gps it reports 79, at 30 gps it reports 33. I've also paced the car next to my wife's VW in case gps wasn't accurate and hers is pretty much dead on with the gps.

I know speedometers typically over estimate by a few percent to be safe but since it can't be adjusted I was curious how far off others found theirs and if it's worse on some models or options.
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  #2  
Old 08-27-2013, 06:39 AM
HotRodW HotRodW is offline
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Compared to my GPS, the speedometer consistently reads 3 to 4 mph too high.
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  #3  
Old 08-27-2013, 08:24 AM
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floydarogers floydarogers is offline
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This subject has been talked about ad nauseum on forums. Here's the most recent on the F30 forum: http://www.bimmerfest.com/forums/sho...ht=speedometer
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  #4  
Old 08-28-2013, 02:46 PM
0w40X1 0w40X1 is offline
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I got my X1 s28i yesterday, plugged in my brand new scangauge, and now can get dead accurate mph, mpg, and horsepower ( this can be adjusted also).

As is out of box there's coolant temp and boost pressure.

Scanguage is always easier for me to read than any cars gauges, and it will store highest rpm, temp, speed, etc.

I'd like to find x gauge codes for auto trans temp and oil temp, but at least I now can read real coolant temp which X1 doesn;'t show.

So now, the only thing I need BMW gauge panel for is to check engine oil level. BMW has some interesting engineering, but it's in the automation, not conversing with the driver.

It's also obvious that the BMW owner is guided as firmly as possible to bring car to the dealer for everything ($$$).
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  #5  
Old 08-28-2013, 05:03 PM
bimmerized bimmerized is offline
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Quote:
Originally Posted by edx1 View Post
On my 35 with staggered (option 323 wheels) it appears the speedometer is off a fair bit, about 5% actually.

At gps speed of 130mph it reported 137, at 75 gps it reports 79, at 30 gps it reports 33. I've also paced the car next to my wife's VW in case gps wasn't accurate and hers is pretty much dead on with the gps.

I know speedometers typically over estimate by a few percent to be safe but since it can't be adjusted I was curious how far off others found theirs and if it's worse on some models or options.
my is similarly off, equipped with the 18" wheels with 225/45/18 tires.

Isn't there a way to calibrate this with the hidden OBC functions?
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  #6  
Old 08-28-2013, 05:46 PM
0w40X1 0w40X1 is offline
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^ I wouldn't think BMW would allow a way to change that, since it's related to German laws, but I'm going to gear my X1 down 5% again when I put 225/40r18 and 255/35r18 tires on next time to allow better cornering and braking.

So, the scan gauge will be adjusted to exact mph and odometer; I find the format easier to use, and lots more info like coolant temp, boost, hpr, etc.
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  #7  
Old 08-29-2013, 08:43 AM
ks9mm ks9mm is offline
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this sucks... because mileage is reported higher by few percent as well?
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  #8  
Old 08-29-2013, 08:54 AM
0w40X1 0w40X1 is offline
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I think the BMW odometer is dead on, but the speedo had a European Union idea thrown on it.
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  #9  
Old 08-29-2013, 09:08 AM
HotRodW HotRodW is offline
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I keep reading that the inaccuracy is the result of some German law, but I'm not clear on what that law is. I was initially told the law states simply that speedometers cannot read too low, which makes far more sense than a mandate to read ridiculously high. It would also explain why our Audi's speedo is spot on.
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Old 08-29-2013, 09:10 AM
ks9mm ks9mm is offline
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i guess i will have to compare odometer with GPS one of those days..
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  #11  
Old 08-29-2013, 09:17 AM
0w40X1 0w40X1 is offline
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The BMW speedo issue seems to be at least related to torts law, and I'm not a lawyer, but every device the last 40 + years has to have stupid language for dim people.

In other words: Nobody can sue BMW for the innocent driver thinking they were driving slower and safer. CYA stuff.

I've heard of BMW design suits for years, so people that misuse technology and machinery can find a payday.
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  #12  
Old 08-29-2013, 09:51 AM
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floydarogers floydarogers is offline
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Quote:
Originally Posted by HotRodW View Post
I keep reading that the inaccuracy is the result of some German law, but I'm not clear on what that law is. I was initially told the law states simply that speedometers cannot read too low, which makes far more sense than a mandate to read ridiculously high. It would also explain why our Audi's speedo is spot on.
The Car & Driver article cited in the thread I cited earlier details the regulations involved, for both EU & US/CA. Since you don't seem inclined to follow it, here's the article directly: http://www.caranddriver.com/features...ometer-scandal

Last edited by floydarogers; 08-29-2013 at 09:52 AM.
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  #13  
Old 08-29-2013, 10:28 AM
HBWT HBWT is offline
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4 MPH at 60 indicated. May go up a size when tires need replacing. That would likely correct some of the error.
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  #14  
Old 08-29-2013, 11:51 AM
HotRodW HotRodW is offline
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Quote:
Originally Posted by floydarogers View Post
The Car & Driver article cited in the thread I cited earlier details the regulations involved, for both EU & US/CA. Since you don't seem inclined to follow it, here's the article directly: http://www.caranddriver.com/features...ometer-scandal
Your link was to a similar thread, which I felt I had no reason to read since I am well aware of the inaccuracy issue. Maybe you should have included the link directly to the Car and Driver article if that's what you wanted us to read.

Is there a reason nearly every post you make reeks of superiority? Your contributions would be much more helpful if they didn't come with a heavy dose of attitude. The fact that you refer to yourself as a "pedant and curmudgeon" leads me to assume your goal here is to insult people at least as much as help them.
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