Speedometer is off by 3 to 4mph.

DarthyPoo · 04-13-2016, 11:28 AM

I have noticed on my GPS while traveling that the speedometer is off by 3 to 4 mph. The issue was reinforced by setting the car to 40 and driving by a radar and having it clock me at 37 mph. Is there a way to correct this?

Vitalität · 04-13-2016, 11:30 AM

Quote:

Originally Posted by DarthyPoo

I have noticed on my GPS while traveling that the speedometer is off by 3 to 4 mph. The issue was reinforced by setting the car to 40 and driving by a radar and having it clock me at 37 mph. Is there a way to correct this?

Did you change your wheels?

Delta0311 · 04-13-2016, 11:41 AM

This is normal. There is a hidden menu you can access to get a digital display of the actual speed. All EU cars are off by a few MPH, this is done on purpose. We have like 100 threads on this.

DarthyPoo · 04-13-2016, 01:28 PM

Quote:

Originally Posted by Delta0311

This is normal. There is a hidden menu you can access to get a digital display of the actual speed. All EU cars are off by a few MPH, this is done on purpose. We have like 100 threads on this.

Do i need equipment for this hidden menu? Or is it just accessed on the dashboard?

Delta0311 · 04-13-2016, 01:32 PM

Quote:

Originally Posted by DarthyPoo

Do i need equipment for this hidden menu? Or is it just accessed on the dashboard?

It would have to be coded.

feuer · 04-13-2016, 09:56 PM

Quote:

Originally Posted by Delta0311

This is normal. There is a hidden menu you can access to get a digital display of the actual speed. All EU cars are off by a few MPH, this is done on purpose. We have like 100 threads on this.

The digital speed read out in the cluster could still be off if not coded to show accurate speed. Basically is two diffents codes that need to be changed. Also, is not only issue with EU cars, Asian and domestic suffer from this too. Most speedometers are generous.

DarthyPoo · 04-14-2016, 07:36 AM

Thanks for the info, i will do more research. I would like to attempt to fix the issue myself.

feuer · 04-14-2016, 08:35 AM

Quote:

Originally Posted by DarthyPoo

Thanks for the info, i will do more research. I would like to attempt to fix the issue myself.

If you can't find local coder you can have it done remotely. You will need OBD2-USB cable, laptop and WIFI. Seek out for assistance in the regional's http://www.e90post.com/forums/forumdisplay.php?f=46
and coding section http://www.e90post.com/forums/forumdisplay.php?f=368

Riceball777 · 04-15-2016, 12:51 AM

Bmw speedo rear way higher than any other car I have seen. The way to fix this is by running a 25.6-26 inch diameter. The stock tires 225/40/18 and 255/35/18 are 25 inch in diameter. A 245/40/18 or a 275/35/18 is about 25.7 inches and make the speedo read perfect.

The HACK · 04-15-2016, 01:06 PM

Wait until you get to about 140mph.

LMB335IS · 04-16-2016, 12:39 PM

Quote:

Originally Posted by Riceball777

Bmw speedo rear way higher than any other car I have seen. The way to fix this is by running a 25.6-26 inch diameter. The stock tires 225/40/18 and 255/35/18 are 25 inch in diameter. A 245/40/18 or a 275/35/18 is about 25.7 inches and make the speedo read perfect.

I guess you could this, or just code the digital speedo active and the digital speedo correction inactive. If you have a DCAN cable it's free to do.

04-13-2016, 11:28 AM	#1
DarthyPoo New Member 1 Rep 7 Posts Drives: 2010 BMW 328i xDrive Join Date: Feb 2016 Location: Vermont iTrader: (0)	Speedometer is off by 3 to 4mph. I have noticed on my GPS while traveling that the speedometer is off by 3 to 4 mph. The issue was reinforced by setting the car to 40 and driving by a radar and having it clock me at 37 mph. Is there a way to correct this?
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04-13-2016, 11:41 AM	#3
Delta0311 Banned 7478 Rep 10,120 Posts Drives: 2011 BMW 335xi E92 2016 228xi Join Date: Apr 2009 Location: NJ iTrader: (1)	This is normal. There is a hidden menu you can access to get a digital display of the actual speed. All EU cars are off by a few MPH, this is done on purpose. We have like 100 threads on this.
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04-14-2016, 07:36 AM	#7
DarthyPoo New Member 1 Rep 7 Posts Drives: 2010 BMW 328i xDrive Join Date: Feb 2016 Location: Vermont iTrader: (0)	Thanks for the info, i will do more research. I would like to attempt to fix the issue myself.
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04-15-2016, 12:51 AM	#9
Riceball777 Lieutenant 163 Rep 466 Posts Drives: S2000 618whp/ e90 335i Join Date: Jul 2012 Location: Los Angeles iTrader: (0)	Bmw speedo rear way higher than any other car I have seen. The way to fix this is by running a 25.6-26 inch diameter. The stock tires 225/40/18 and 255/35/18 are 25 inch in diameter. A 245/40/18 or a 275/35/18 is about 25.7 inches and make the speedo read perfect. __________________ 2007 e90 335i pure stage 2 DD turbos, rb inlets
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04-15-2016, 01:06 PM	#10
The HACK Midlife Crises Racing Silent but Deadly Class 1821 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	Wait until you get to about 140mph. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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