In my old sets there are many 3651 parts that are broken.


As far as I remember, these sets do not use studs on the piece. Per this answer, new piece with the same function is 32013:


Can I just buy some of 32013 and use it everywhere instructions tell me to use 3651? Is it supposed to just fit? I could try to build 3651 but I'm afraid I'll break it again.

  • 1
    Can't think of anything why the 32013 would not fit as replacement, except when the studs would be used and although I also can't immediately name a set where they were used, I have a feeling that there are some. The 32013 looks to me sturdier, the technic bush shaped part of 3651 is prone to cracking (like the technic bushes themselves) I agree with the answer you refer to that the redesign happened because of the introduction of the new angular connectors. Commented Feb 22, 2018 at 10:36
  • @MichaelVerschaeve I was afraid that lengths might not be the same. I can't find technical drawings of them. "Prone to cracking" - yes, exactly :(
    – Mołot
    Commented Feb 22, 2018 at 10:41
  • Besides the studs there is another difference that may affect the interchangeability: the 24 tooth gear next to its leg would intersect with the newer one.
    – BalazsToth
    Commented Feb 22, 2018 at 10:46
  • @BalazsToth I posted CW answer, feel free and invited to add to it.
    – Mołot
    Commented Feb 22, 2018 at 11:23

1 Answer 1


Dimensions are, respectively:

Distance between one axle and end of another also did not change. So for most builds it should work.

Incompatibilities include:

  • Obvious lack of studs

  • Use as in Lego Technic Universal Set 8034 as a locking mechanism for lift system, as seen on the box:

    Part of 8034 box

  • This answer was posted as Community Wiki, please add incompatibilities if you know them

  • 1
    Yes! The old part can be used as a "lock" or "stop" to prevent gears turning, and it works because of the flared edge. The new one (32013) does not have this, so you might have to improvise a bit.
    – Benxamin
    Commented Mar 8, 2018 at 19:58

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