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Swapping an Ecoboost engine from a Focus to Fiesta?

tux850
tux850
in Ford Fiesta Club

Featured Replies

Does anyone know if a 1L 100PS Ecoboost from a Focus would be a straight swap into a 1L 100PS Ecoboost Fiesta?

Specifically, the Fiesta engine is stamped SFJA and the Focus engine stamped M2DA.

I bought the Focus engine primarily as a spare for its ancillary parts but am now beginning to wonder if the whole thing might prove to be a potential swap should it ever be required. Unfortunately the two engines aren't colocated so I can't easily perform a visual comparison. From casual memory I think they look identical though, but then the differences might be too subtle to notice but nevertheless significant? Or they might be obviously different but I just haven't noticed!

  • Quote


    Iirc from another thread (which I can't find at the mo!) the M2DA has a single mass flywheel and is intended to be paired with an IB5 box as used in the Fiesta. So sounds a better match than a DMF version meant for a 6 speed box.

  • Quote
    • Author

    Ooh okay, that sounds like a stroke of luck. 

    Here are some pics of the Focus M2DA engine and from what I can tell it looks just like the one in our Fiesta:

    IMG_4141.thumb.JPG.6088e9c6a2edb6c8e7b4d9d8cf87ba90.JPG

    IMG_4142.thumb.JPG.b869e01169cf8e46918e9f7eff2a9c75.JPG

    IMG_4143.thumb.JPG.1acff3961a001690424eec7aacbd2295.JPG

    IMG_4144.thumb.JPG.739d7060d229491715188837703c3509.JPG

    IMG_4146.thumb.JPG.03ed2654b49a49200412302070930e85.JPG

    It does indeed have a single mass flywheel... albeit a somewhat corroded one at that!!

  • Quote
    3 hours ago, Eric Bloodaxe said:

    another thread (which I can't find at the mo!)

    This may be the one I was thinking of. Coincidentally you seem to have posted on it😃

     

     

  • Quote
    • Haha 1

    How times have changed! ...or is it us who have changed???

    40 years ago it would have been "Can I fit a 2.8L V6 from a Capri into my Fiesta?"

  • Quote
    • Haha 4
    • Author
    16 minutes ago, alanfp said:

    How times have changed! ...or is it us who have changed???

    40 years ago it would have been "Can I fit a 2.8L V6 from a Capri into my Fiesta?"

    Or possibly wouldn't even have asked - would've just cracked on with it regardless and worked it out along the way! 

     

  • Quote

    The base engine, including the turbo is the same, 100PS to 100PS.

    It could be something daft like the flywheel or, more importantly, the engine harness that makes it unique to Focus.

    I would ensure I used all the ancillaries and engine harness from the Fiesta engine when fitting it

  • Quote
    10 hours ago, alanfp said:

    How times have changed! ...or is it us who have changed???

    40 years ago it would have been "Can I fit a 2.8L V6 from a Capri into my Fiesta?"

    And l'm pretty sure the answer would of been yes!! - plenty of space in the old fiesta for the 2.8 - problems started when you tried to mount said engine and when you tried to plan where the hell the transmission was gonna go!!😂😂

  • Quote
    11 hours ago, alanfp said:

    How times have changed! ...or is it us who have changed???

    40 years ago it would have been "Can I fit a 2.8L V6 from a Capri into my Fiesta?"

    And now a 1.0 turbo with a little electrical assistance can provide more power and torque than that heavy, thirsty 2.8 V6 lump! :biggrin: 

  • Quote
    • Like 2
    1 hour ago, TomsFocus said:

    And now a 1.0 turbo with a little electrical assistance can provide more power and torque than that heavy, thirsty 2.8 V6 lump! :biggrin: 

    But never sound the same

  • Quote
    • Like 3

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    • The Digestive Forum Roundup (24th May - 31st May 2026)

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      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
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