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.
Technic Pin Connector Round [Slotted]Metallic SilverPart 62462Element 6542283 or 6204673×2
Technic Special
8 pieces
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×8
Technic Bushes
7 pieces
Technic BushBlackPart 3713Element 6332148 or 6210506×7
Technic Gears
4 pieces
Technic Knob WheelBlackPart 32072Element 6284188 or 4248204×4
Bricks Curved
2 pieces
Brick Curved 4 x 1 Double, No StudsBlackPart 93273Element 4613153×2
Plates
2 pieces
Plate 1 x 1BlackPart 3024Element 302426×2
Technic Panels
2 pieces
Technic Panel Fairing #21 5L Small Smooth, Side BBlackPart 11946Element 6316923 or 6023036×1
Technic Panel Fairing #22 5L Small Smooth, Side ABlackPart 11947Element 6319983 or 6022761×1
Technic Beams Special
1 piece
Technic Beam 5 x 5 x 2 Perpendicular Fork 3 FingersDark Bluish GrayPart 19086Element 6102645×1
Tiles Special
1 piece
Tile Special Round 1 x 1 with Hollow BarBlackPart 20482Element 6186675 or 6167933×1
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.