Free tool

LEGO Missing Piece Checker

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.

Mosaik Set (Small)

Checking

1300 Mosaik Set (Small)

47 pieces in 13 part and color combinations.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Show

Piece checklist

Bricks 33 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×2
  • Brick 2 x 2 without Bottom Tubes, Slotted (with 2 slots, opposite) Blue Part 3003d ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×9
  • Brick 1 x 2 without Bottom Tube, Slotted (with 1 slot) Red Part 3065b ×2
  • Brick 2 x 2 without Bottom Tubes, Slotted (with 2 slots, opposite) Red Part 3003d ×1
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×14
  • Brick 1 x 2 without Bottom Tube, Slotted (with 1 slot) White Part 3065b ×2
  • Brick 2 x 2 without Bottom Tubes, Slotted (with 2 slots, opposite) White Part 3003d ×1
  • Brick 10 x 20 without Bottom Tubes, with '+' Cross Support and 4 Side Supports (early Baseplate) Yellow Part 700a ×1

Bricks Round and Cones 14 pieces

  • Brick Round 1 x 1 Solid Stud, No Bottom Groove Blue Part 3062c ×5
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch White Part 3063b Element 4501579 or 306301 ×2
  • Brick Round Corner 2 x 4 Half Round with Cutouts White Part 716 ×2
  • Brick Round 1 x 1 Solid Stud, No Bottom Groove Yellow Part 3062c ×5

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.

Request a replacement from LEGO

Buy the piece

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.