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Thread: 1990 bmw e30 325i - Connector location for the crankshaft position sensor?

  1. #1
    Join Date
    Sep 2015
    Location
    Seminole, FL, USA
    Posts
    131
    My Cars
    1990 BMW 325i Sedan

    1990 bmw e30 325i - Connector location for the crankshaft position sensor?

    I have a 1990 BMW 325i. I am trying to diagnose starting problems. The car struggles to start after sitting for a time (hours or overnight). The car cranks, but does not start after sitting ... If I let it crank for 10-20 seconds it will eventually start. After that, if I turn it off and restart, it comes right up.

    From my reading, the crankshaft position sensor may be a culprit. I know what to test, but I am struggling to find the location of the connector. The tests require that I check the resistance at the connector.

    Any guidance on how to find the connector's location will be appreciated. NOTE: I can find the crankshaft position sensor, but the wire disappears somewhere below the manifold.

  2. #2
    Join Date
    Dec 2005
    Location
    corpus christi, texas
    Posts
    6,738
    My Cars
    No e30s, again :(
    the connection should be above the alternator, if I remember right. above the alt and under the edge of the intake manifold. I might be a little off, forward or side to side because its been years since I have owned an I model but I remember it being somewhere near there.

    and someone else will come along and be more precise in a bit

    when my 89 325i had problems with that sensor, it would only run on half the cylinders. I never had start issues from it.
    No e30s again.

  3. #3
    Join Date
    Sep 2015
    Location
    Seminole, FL, USA
    Posts
    131
    My Cars
    1990 BMW 325i Sedan
    Thank you ... I found it!

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