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Speedo & Odometer Just Quit Working

Posted: Fri Sep 13, 2019 7:17 pm
by tonypatthou
Three weeks ago, all of a sudden the Speedo and Odometer in my 1981 528i just quit working.
Nothing major happened, no accidents, no bumps, or driving through standing water. The car has 127,000 original miles, and everything has always worked perfectly. I have no idea what caused this, or what to do next. Could some connection underneath the car have loosened, or fallen off? Is there some sort of cable that needs to be replaced?
Any advice or suggestions would be greatly appreciated. Thank you in advance!
Tony

Re: Speedo & Odometer Just Quit Working

Posted: Sat Sep 14, 2019 3:01 pm
by Champie12
Well your speedometer is driven by a series of cables (in-line) that come out the back of your speedometer, go through the firewall, and travel around to the back of your transmission. Inside the transmission the cable attaches to a gear which drives it. I would start by checking the entirety of the cable from the transmission to the speedometer and ensuring that all the connections are together and tight. I'm not too knowledgeable on the inner workings of the speedometer or transmission and whether or not anything in them is prone to breaking. However your odometer gears are very prone to breaking but shouldn't stop your speedometer from working. If something inside your speedometer/odometer has broken, I would recommend sending it to odometergears for fixing. Yous could also pull the cables apart at their connections and check that the square ends of the cables are still square and not rounded, leading to a situation where one cable is no longer spinning the next one.

Hope this helps! Anyone that knows more, please chime in!

Re: Speedo & Odometer Just Quit Working

Posted: Sun Sep 15, 2019 7:02 am
by tonypatthou
Thank you for your feedback.
It seemed weird that they both stopped working at the same time.
Tony