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Thread: z4 engine transplant question

  1. #1
    BMWHaus Contributor
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    z4 engine transplant question

    Anyone know if it is a straight swap to replace the 2.5 m54 to the 3ltr version?

    As in using the same mounts, gearbox etc. Is it literally just a case of unplugging one and plugging the new one in?

    Would I need the 3ltr ecu/loom etc?

    Am I right in saying that it is the same engine in the e60 etc?

    This is only a thought at the moment.

    Thanks

  2. #2
    BMWHaus Contributor
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    RE: z4 engine transplant question

    I'm no expert but I'd imagine it's a very similar. Is the z4 manual? All 530i e60's are auto's as far as I'm aware, so I'd imagine the process would be a lot easy if going auto-auto

  3. #3
    BMWHaus Guru
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    RE: z4 engine transplant question

    I'm not sure if it's worth the expense/effort to be honest Kris, I'd say if you can hold out for a 3L do, they pop up once in a while and they're usually cheaper than the 2.5 / 2.0s so win win!

  4. #4
    BMWHaus Contributor
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    RE: z4 engine transplant question

    The car is manual.

    I am right in saying the 3ltr out of the early e60 is the same as the e39?

    Im just thinking down the line Peter. If i get bored

    Plenty of 3ltr e39s being broken these days.

    Could get a decent 3ltr fitted for around 1k id say if it litterally bolts straight in.

  5. #5
    BMWHaus Guru
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    RE: z4 engine transplant question

    If it's 1 - 1.5k then I'd say go for it the engine you're looking for is the M54B30 it was fitted to the e46 330i, e39 530i, early e60 530i etc more details here :

    https://en.wikipedia.org/wiki/BMW_M54#M54B30

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