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Thread: E23 Speedometer Face Size

  1. #1
    Join Date
    Feb 2011
    Location
    Bayview, WI
    Posts
    2,918
    My Cars
    1983 BMW 320i M20 Turbo

    E23 Speedometer Face Size

    Hey guys. Coming over from the e21 section. I am currently searching for the cleanest way to put an electric speedometer into my e21 gauge cluster due to having an e30 m20b25 turbo swap and medium case diff swap. I was curious on what size diameter the e23 speedometer is? The e28 and e30 gauges are smaller than the e21 which doesn't look right and requires cutting the cluster which I dont want to do. So, I am hoping the e23 gauge is the correct size I need. If someone could measure the diameter of their speedometer for me that would be awesome. Thanks!
    1999 Z3 Coupe 2.8L


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  2. #2
    Join Date
    Apr 2017
    Location
    Texas
    Posts
    1
    My Cars
    E21 Euro
    In for any info. I've been pondering this shit about my E21 all day and then I find someone else is too! Rock on! How long have you owned your E21?

  3. #3
    Join Date
    Jan 2008
    Location
    downpatrick, N.Ireland
    Posts
    2
    My Cars
    '82 323 (non i) peugeot 306 dturbo
    Was there ever any update on this? e28 clock is 4.5"

  4. #4
    Join Date
    Mar 2006
    Location
    Sacramento, CA
    Posts
    935
    My Cars
    87 535i/84 €735i/8
    E28 is the same size as the E23.
    --Jay3->Sic gorgiamus allos subjectatos nunc
    84 €735i manual, 88 528e/i
    Motronic 1 and 1.3 wiring
    Transmission & Diff gearing sheet

  5. #5
    Join Date
    Apr 2004
    Location
    Hamburg, NY USA
    Posts
    1,583
    My Cars
    e23, e32, e34, e39
    What about an early e23 speedo, with the the speedo in the middle. The one I have looks bigger and measures bigger from the outside of the front glass compared to measuring the same way on a later one.

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