Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece
and leave with the element ID LEGO asks for, or a link to buy the part.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Technic Beam 1 x 3 ThinBlack ×12Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Technic Brick 1 x 4 [3 Pin Holes]YellowPart 3701Element 370124×2
Bricks
4 pieces
Brick 1 x 4Light Bluish GrayPart 3010Element 4211394×2
Brick 1 x 3RedPart 3622Element 362221×2
String, Bands and Reels
4 pieces
Rubber Belt Small [15mm ID] [Round Cross Section]WhitePart 85543Element 6699001 or 4580665×4
Tiles Special
2 pieces
Tile Special 1 x 2 Grille with Bottom GrooveBlackPart 2412bElement 241226×2
Bricks Round and Cones
1 piece
Brick Round 2 x 2 Dome Top, Hollow StudLight Bluish GrayPart 30367cElement 4211637×1
Stickers
1 piece
Sticker Sheet for Set 42056-1[No Color/Any Color]Part 27056Element 6154914×1
Tick each piece as you find it, or mark it missing.
When a piece really is missing
Ask LEGO
LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for
the set number and each piece's element ID, the number printed beside the piece in the parts list at the back
of the instructions. This checker lists both.
Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from
older or second-hand sets.
Keep a record
Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick
pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.