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Thread: M52TU MDK Throttle Body Connector

  1. #1
    Join Date
    Apr 2008
    Location
    Australia
    Posts
    503
    My Cars
    E39 99 528iT

    M52TU MDK Throttle Body Connector

    Has any body worked out how to dismantle the 10 pin connector plug to be able to access the wiring connector pins to check for corrosion etc?
    It seems to be in 4 parts.
    Inner part holding the pins, outer ring which rotates to lock/unlock the connector to the throttle body, a red plastic locking piece and a yellow O ring.
    I've got a set of pin connector removers but even with one that fits over the female connector pin I still can't remove the pin and wire from the rear of the plug.
    Does anybody know the secret to this.
    Are they not able to be dismantled?
    Single use only?

    This site has a "How to" to replace the pins but this involves buying a new connector, a sealing grommet and 10 repair wires already fitted with the pins and a blue weather seal.
    http://www.frankies-bmw.com/5series/...tle_faults.php

    Any help appreciated

    TIA from Downunder
    RonR

    99 528iT M52TU 5HP19
    RHD Euro Spec

  2. #2
    Join Date
    Jun 2015
    Location
    Sydney, NSW, Australia
    Posts
    171
    My Cars
    1999 E39 M5
    It might be this:-


    https://www.newtis.info/tisv2/a/en/e...minal/1M0Sa90X

    HTH from Downunder

  3. #3
    Join Date
    Jun 2013
    Location
    Boston, MA
    Posts
    753
    My Cars
    99 528i/5, 05 ZHP conv
    I love all this work in solving the MDK issue .... the MDK issue will strand those of us with the otherwise solid M52TU engine without warning (limp mode)

    One of the BMW special tools mentioned in the Newtis link above has a cheaper Hazet equivalent. Actually a pretty standard de-pining tool.

    I can't find the first special tool listed, the one used to unlock the inner barrel counter-clockwise. However I believe it is part# 61 1 145 - special release tool for the 10-pin D1.5mm connector and which appears no longer available.

    EDIT: It looks like BMW # 61 1 145 has been replaced by BMW part #83 30 0 492 719 or just 0 492 719
    it is available from ECS tuning and listed as a release tool, but no picture is shown.

    The pin release tool is 61 0 303:
    BMW 61 0 303 = Hazet 4671-4 - round system 2.5mm "Tyco" contacts

    helpful links:
    http://www.m3forum.net/m3forum/showthread.php?t=601169

    http://www.bmwgroup-wep.com/download...cabinet_en.pdf
    Last edited by effduration; 02-15-2020 at 09:53 AM.

  4. #4
    Join Date
    Jun 2015
    Location
    Sydney, NSW, Australia
    Posts
    171
    My Cars
    1999 E39 M5
    This is what 61 1 145 looks like:-



    You should be able to make something to unlock that inner ring.
    Once you’ve done that, if your pin tool is nice and snug over the pin and can push the lock tangs back, the contacts should pull out the back of the connector.

  5. #5
    Join Date
    Apr 2008
    Location
    Australia
    Posts
    503
    My Cars
    E39 99 528iT
    Thanks for the info guys.
    Unfortunately the MDK connector doesn't have the release mechanism to use tool 61 1 145.
    The only think you can see under X10 magnification is part of the red indicator that shows in the indicator window when the plug is correctly inserted and locked.
    It looks like I will purchase a new plug, contacts with attached wire and the grommet.

    Regards from Downunder
    RonR

    99 528iT M52TU 5HP19
    RHD Euro Spec

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