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      04-21-2012, 09:53 AM   #1
divisionbell77
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speedo off

anyone have an issue where their speedo is off by too much? seems between 55/60 to 80 plus it gets worse.

Around 60 it is off my a few MPH then by 80 it is off by 5 MPH. Both causes I am going slower than reported.

I've had the 335i for a few weeks, so will bring it up with the dealer.

Was driving on the HW on a long trip and was constantly being passed and could not figure it out. Then looked and the GPS and noticed the large difference in reported MPH at 80. Figured the GPS was off. On trip back it was still happening, so popped the android out, looked for a speed app, found one, and it was reporting +/- 1 MPH with the dedicated GPS. Ok, so both GPS based and could be off. Then I drove by a 'your current speed is' set up on the side of the HW, and sure enough that was confirming both GPS units were within reason and the 335i speedo was in fact off by 5 MPH.
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      04-21-2012, 11:32 AM   #2
mlifxs
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yes. at 60mph indicated, my gps says 57.

I think I've read here that this is the case on BMWs in general
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      04-21-2012, 02:40 PM   #3
divisionbell77
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Any thing that can be done to correct it? I mean, my previous car, a Mazda, was half the price and dead on.
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      04-21-2012, 03:12 PM   #4
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Supposedly German cars read a little under as there is a large fine if they read over.. Deal breaker? Hardly.
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      04-21-2012, 03:19 PM   #5
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Quote:
Originally Posted by divisionbell77 View Post
Any thing that can be done to correct it? I mean, my previous car, a Mazda, was half the price and dead on.
don't know, maybe taller diameter tires would bring it back closer?
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      04-21-2012, 03:43 PM   #6
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Quote:
Originally Posted by divisionbell77 View Post
Any thing that can be done to correct it? I mean, my previous car, a Mazda, was half the price and dead on.
Yes. You can disable the difference by coding the feature out (refer to coding section).

If it's increasing with proportion to speed, that's an indicator of incorrect wheel/tire diameter.
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