Results 1 to 3 of 3

Thread: Speedometer issues M240xi

  1. #1
    Join Date
    Apr 2018
    Location
    Chicago
    Posts
    1
    My Cars
    2017 M240xi Convertible

    Speedometer issues M240xi

    Has anyone had accuracy issues with their speedometer? Mine registers about 5% more that actual. Dealer says this is normal & they said the BMW variance tolerance is 10%! Seriously? A $60k finely tuned sport machine and I have to do a mental calc to determine how fast I'm going? What about the odometer? Is it registering 5% more miles as well?

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    6,001
    My Cars
    2018 BMW M240i
    I checked the accuracy of the speedo in my M240i last month. I was driving on a relatively deserted road in southern Virginia. I used the Speed app on my iPhone to check the speedo’s accuracy. At an indicated speed of 65mph the Speed app showed I was driving at a speed of 64mph.

  3. #3
    Join Date
    Mar 2004
    Location
    San Diego
    Posts
    3,481
    My Cars
    2000 Z3 2.3, 2014 M235i
    Quote Originally Posted by LarryK View Post
    Has anyone had accuracy issues with their speedometer? Mine registers about 5% more that actual. Dealer says this is normal & they said the BMW variance tolerance is 10%! Seriously? A $60k finely tuned sport machine and I have to do a mental calc to determine how fast I'm going? What about the odometer? Is it registering 5% more miles as well?
    Its not the car's fault, if you want you can take your argument up with the EU regulations...

    https://www.theglobeandmail.com/glob...ticle11487709/

    European law (ECE-R39) says speedometers cannot show speeds less than the actual speed, and they must never show more than the 110 per cent of actual speed plus 4 km/h. So, under those rules, a car could be moving at 100 km/h, but the speedometer could legally display as high as 114 km/h.
    edit: Also, the odometer is actually quite accurate, its just the speedo that reads high due to regulations.
    Last edited by Luftwaffe1O1; 05-25-2018 at 04:15 PM.

    Suspension: Bilstein Sports, GC Coilover conversion, IE Subframe Bushings, IE RTABs, M roadster sways, M roadster front control arms, M roadster Front calipers/hubs.
    Engine/Driveline: M54B30 intake Manifold, Dinan CAI, ZHP Cams, Headers, Underdrive pulleys, Conforti Software, 3.46 diff.

Similar Threads

  1. Speedometer issues
    By jmontoya in forum 1995 - 2001 (E38)
    Replies: 3
    Last Post: 12-20-2008, 11:35 PM
  2. Weird Speedometer issue.
    By GardenBeast in forum 1991 - 1999 (E36)
    Replies: 10
    Last Post: 12-02-2008, 10:24 AM
  3. speedometer issues
    By brunos325is in forum 1983 - 1991 (E30)
    Replies: 5
    Last Post: 01-29-2007, 02:45 PM
  4. Speedometer issue....
    By dhallibu325e in forum 1983 - 1991 (E30)
    Replies: 11
    Last Post: 10-31-2006, 08:50 PM
  5. Speedometer issue
    By wallgood358 in forum 1983 - 1991 (E30)
    Replies: 2
    Last Post: 05-30-2006, 06:36 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •