BMW presents the 745i in July 1983:

“More modern technology is hardly possible.”

“The 4-speed automatic electric transmission – the first time in history of the automobile.”

34 thoughts on “Introduction

    1. Y.C.LIN

      hi~ i am happy to see this website,i have e23 1985 745(eu) in Taiwan,my 745 have Rebuilding, if i have question can ask you? thank`s~


  1. Adnan

    Hi Niko,
    I’m Adnan from Bosnia.I have BMW E34 with m106 engine.
    Specifications of engine is:
    * Garrett Gt35 twinscroll turbo
    * Big intercooler
    * 76mm pipes from/to IC
    * Chip tuning from Jarmo Havulinna
    * Adjustable fuel regulator
    * O-Ring headgasket
    * m30b35 head
    * m30b35 intake manifold with throttle on other side
    * exhaust manifold one by one cylinder
    * Turbosmart external wastegate 38mm
    * Two additional fuel injectors in intake
    * Greeddy blow off
    * Two Walbro fuel pumps
    * ….etc….
    Now I buy new fuel injectors and car shoking from idle to 3500rpm because it is to many fuel in that range.I need reprogram this EPROM,how can I reduce fuel in down side before car get in boost.
    Best Regards…


    1. turbobmw Post author

      Hi Adnan,

      You can try free program called tuner pro for changing M106 fuel maps. But i think you would be better of with modern management replacing old factory stuff. Especially if you do not have original automatic in place. With so many nice modifications you are quite off original setup and it can be hard to have it spot on or even close. All the best, Niko.


      1. Adnan

        I need definition file to open it with Tuner Pro.
        File with extension xdf if you have it.
        Best Regards


  2. turbobmw Post author

    Okay, sorry do not have it. Quick solution is to read and combine binaries from both chips and use it as single 64K file. When done modifying split it two again and make new eproms. Good luck !


  3. Tommy Vlahos

    Hi Niko !!
    Hope your well,
    We’ll car was running great thanks to your help, and now the lower radiator hose destroyed the head gasket and warped the head….
    Any recommendations for the up grade and place to order from or any parts you may have?


    1. turbobmw Post author

      Hi Tommy!

      Nice to hear from you, i am glad you sorted all car issues.

      Check for second cyl. head, usually there is at least one for sale.

      I will email you bit later with more details.

      You’re most welcome


      1. roberto

        I’ really interested in the ECU you have for sale, please get back to me in my email if it is still available. thanks


  4. JP

    Hi everyone !
    I wonder if lead substitute is needed inside a M106
    Mine is stock with 220 000 km.
    Previous owner use this product so far.
    Thank you very much.


    1. turbobmw Post author

      Hi JP!

      Here is copy of Service-page, see more there:

      If head is manufactured on or after september 1984, substrates are not needed according to BMW technical bulletin.

      You’re welcome,


      1. JP

        Thank you again
        As it is a 1984 mod I need to find the production month to be sure.
        By the way, I only put unleaded fuel inside the other big six BMW that I have without any problem so far, it is a 3553cc 1979 6er.
        But special valve requires special features I guess on stelit (I believe) exhaut valves of the M106.
        Just thoughts…


      1. JP

        I will the check the production period on the cylinder head.
        However the “memory effect” of lead left over the valve seats is a tremendously interesting fact!
        I will no longer worry about that while enjoying the endless torque sensation of this brilliant engine.
        Great to have this informations Niko !
        Thanks a lot.


    1. turbobmw Post author

      Hello John,

      Here are vacuum lines from my memory.

      Intake side: fuel pressure regulator, engine breather pipe, knock box line, HVAC system (check valve). These all connect to bottom side of intake manifold.
      Exhaust side: magnetic valve bottom and two top connections (see Files/BMW M106 repair files/last page).

      Sensors are very similar to automatic M30 engines with two exceptions: knock sensors fixed to block (cyl 1&6), this on intake side. Cyl id loop on ignition wire no 1.

      I may have forgotten something.


  5. Sean

    Hello and Good day

    I recently started on an m106 swap into a 1984 325e. I salvaged the engine from a 1986 bmw 745I so far I have collected the m106 paired with a ZF 4 Hp22 4 speed automatic both were out of the same 745i. I have the engine harness and transmission harness with shifter and luckily I was able to get the Motronic Ecu and transmission controller box however the wiring for the knock box was cut and I ended up buying a knock box off Ebay. The only other parts I know needed for the swap are engine mount arms and I need to source a front sump oil pan and pickup tube.

    I ran into issues finding wiring diagrams with c101 connector pinouts to re pin the chassis c101 plug on my 325e to the m106. If anyone knows where I can get the diagrams for the c101 on the 1986 745i turbo it would be an enormous help.

    any help is greatly appreciated




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