Speedometer a little fast?

Dvdman · 08-26-2010, 03:50 PM

When I drive my 335 I cant believe the handling of the car. I go 50mph and it feels like 25mph. Anyway I was driving one day next to a car that had a numerical speedometer. I thought i was going 40 and his read 36. I might be off but I remember a speed trap were it shows how fast your driving and it seems off by about 4 or 5mph. Anyone have this problem?

fisherbln · 08-26-2010, 03:54 PM

Do we need to have one of these threads every single day?

travelinman53 · 08-26-2010, 03:57 PM

I've heard that BMW purposely calibrates their speedos to account for the largest wheel/tire combo possible. On my E36 i went with 235/45 tires instead of the 235/40's that came from the factory to better compensate for this. On the E90 I decided to mount 255/40's on the rear to replace the 255/35's. I hope this helps answer your question.

Dvdman · 08-26-2010, 04:22 PM

Got it..

Jeff@TopGearSolutions · 08-26-2010, 04:54 PM

they are off 2-4 MPH... yes

themyst · 08-26-2010, 05:01 PM

its not a specific speed, it's a percentage. At 100MPH speedo is about 5MPH off, at 80MPH its 4MPH off, etc etc.

MKE_M3 · 08-26-2010, 05:41 PM

Quote:

Originally Posted by themyst

its not a specific speed, it's a percentage. At 100MPH speedo is about 5MPH off, at 80MPH its 4MPH off, etc etc.

That is correct, and it has been this way for years. I have had 5 bmws and for sure my 89 had the fast speedo.

dlbrooks18 · 08-26-2010, 05:42 PM

I've been watching that new series on the SPEED channel "Battle of the SuperCars" and the speedo's on most of the cars they test are always faster than what the VBOX calculates.. so I believe this to be true for most car's especially if you've changed your wheel/tire setup

Ron1n · 08-26-2010, 05:55 PM

It's approximately 5%, but not on all cars. 82MPH on my speedo = 80MPH in actuality.

Tortfeasor 335xi · 08-26-2010, 07:17 PM

This just means that BMW is eventually going to get sued for odometer fraud. Just like Subaru and Honda before them. Both Honda and Subaru had to settle class action law suits and extend warranties due to speedometers reading off a few percentage points. You would think that after two other manufacturers got sued class action that they would have learned...

themyst · 08-26-2010, 10:23 PM

Quote:

Originally Posted by Tortfeasor 335xi

This just means that BMW is eventually going to get sued for odometer fraud. Just like Subaru and Honda before them. Both Honda and Subaru had to settle class action law suits and extend warranties due to speedometers reading off a few percentage points. You would think that after two other manufacturers got sued class action that they would have learned...

Wrong. the speedometer might be off, but the odometer is spot-on. I invite you to route a trip via your GPS then reset one of your trip meters. The resulting distance will be identical. This has been covered here numerous times already.

I just wish Shiv could perhaps work a little magic and fix this for us. It's gotta be possible if he can hijack all the gauges to do various things!

08-26-2010, 03:50 PM	#1
Dvdman Major 170 Rep 1,000 Posts Drives: 2022 X5 and 2007 M6 Join Date: Aug 2009 Location: Chicago, IL iTrader: (2)	Speedometer a little fast? When I drive my 335 I cant believe the handling of the car. I go 50mph and it feels like 25mph. Anyway I was driving one day next to a car that had a numerical speedometer. I thought i was going 40 and his read 36. I might be off but I remember a speed trap were it shows how fast your driving and it seems off by about 4 or 5mph. Anyone have this problem?
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08-26-2010, 03:54 PM	#2
fisherbln Captain 12 Rep 859 Posts Drives: 2007 335i Coupe Join Date: Sep 2009 Location: USA iTrader: (2)	Do we need to have one of these threads every single day? __________________ 2007 335i SG Coupe 2009 128i AW
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08-26-2010, 03:57 PM	#3
travelinman53 Olde Fart Young at Heart 0 Rep 54 Posts Drives: 08 335, 95 M3 Join Date: Mar 2008 Location: Bakersfield, CA iTrader: (0) Garage List 95 M3 [0.00]	Optimistic Speedos I've heard that BMW purposely calibrates their speedos to account for the largest wheel/tire combo possible. On my E36 i went with 235/45 tires instead of the 235/40's that came from the factory to better compensate for this. On the E90 I decided to mount 255/40's on the rear to replace the 255/35's. I hope this helps answer your question.
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08-26-2010, 04:22 PM	#4
Dvdman Major 170 Rep 1,000 Posts Drives: 2022 X5 and 2007 M6 Join Date: Aug 2009 Location: Chicago, IL iTrader: (2)	Got it..
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08-26-2010, 04:54 PM	#5
Jeff@TopGearSolutions 3442 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	they are off 2-4 MPH... yes
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08-26-2010, 05:01 PM	#6
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	its not a specific speed, it's a percentage. At 100MPH speedo is about 5MPH off, at 80MPH its 4MPH off, etc etc. __________________ E90 LCI N54 6AT
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08-26-2010, 05:42 PM	#8
dlbrooks18 Brigadier General 161 Rep 3,736 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	I've been watching that new series on the SPEED channel "Battle of the SuperCars" and the speedo's on most of the cars they test are always faster than what the VBOX calculates.. so I believe this to be true for most car's especially if you've changed your wheel/tire setup __________________ 2008 E90 335
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08-26-2010, 05:55 PM	#9
Ron1n Speed Demon 207 Rep 3,690 Posts Drives: 2021 M5C Join Date: Oct 2009 Location: Irvine iTrader: (6) Garage List 2021 M5 Competition [0.00] 2016 BMW 550i [0.00] 2011 335is [0.00] 2009 E93 M3 [10.00] 2010 335d [9.50]	It's approximately 5%, but not on all cars. 82MPH on my speedo = 80MPH in actuality. __________________ Current: '21 M5C, '15 X6 50i Previous: '18 M550i, '16 550i, '11 335is, '09 E93 M3 DCT, '10 E90 335d, '07 E90 328i
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08-26-2010, 07:17 PM	#10
Tortfeasor 335xi Corporate Hack 4 Rep 288 Posts Drives: '08 335xi Coupe Join Date: Mar 2008 Location: Princeton, NJ / Philly, PA iTrader: (0)	This just means that BMW is eventually going to get sued for odometer fraud. Just like Subaru and Honda before them. Both Honda and Subaru had to settle class action law suits and extend warranties due to speedometers reading off a few percentage points. You would think that after two other manufacturers got sued class action that they would have learned... __________________ New Car: 2008 335xi Coupe Earlier Car: 2004 STi (got stolen) Earlier Earlier Car: 1995 Mustang GT (416 whp and a blown engine) Really Much Earlier Car: 1988 Mazda 626 TURBO
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