I have a collection of LEGO sets, from which only the B model is assembled and the remaining pieces have been lost.

What is the easiest way to figure out which pieces are missing from these sets?

1 Answer 1


You can use the Compare Sets function on Rebrickable for that (if the B model is an official model or a MOC on Rebrickable).

Here an example for both official models from the 42069 set.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.