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.

Junior Constructor

Checking

717 Junior Constructor

482 pieces in 32 part and color combinations.

LEGO counts 510 pieces. This inventory comes from a separate parts catalog and lists 482; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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 454 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×6
  • Brick 1 x 2 without Bottom Tube Blue Part 3065 ×26
  • Brick 1 x 6 without Bottom Tubes, with 2 Raised Cross Supports Blue Part 3009a ×14
  • Brick 2 x 2 without Inside Ridges Blue Part 3003a ×4
  • Brick 2 x 4 without Cross Supports Blue Part 3001a ×1
  • Brick 10 x 20 without Bottom Tubes, with '+' Cross Support (early Baseplate) Light Gray Part 700b ×4
  • Brick 1 x 1 Red Part 3005 Element 300521 ×3
  • Brick 1 x 2 without Bottom Tube Red Part 3065 ×3
  • Brick 1 x 6 without Bottom Tubes, with 2 Raised Cross Supports Red Part 3009a ×6
  • Brick 1 x 8 without Bottom Tubes with Cross Side Supports Red Part 3008a ×1
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×5
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×17
  • Brick 2 x 3 without Cross Supports Red Part 3002a ×42
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×145
  • Brick 2 x 8 Red Part 3007 Element 6036408 or 300721 ×1
  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×10
  • Brick 2 x 4 without Cross Supports Trans-Clear Part 3001a ×4
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×6
  • Brick 1 x 2 without Bottom Tube Yellow Part 3065 ×25
  • Brick 1 x 8 without Bottom Tubes with Cross Side Supports Yellow Part 3008a ×5
  • Brick 2 x 10 Yellow Part 3006 Element 6119276 or 6073100 ×7
  • Brick 2 x 2 without Inside Ridges Yellow Part 3003a ×25
  • Brick 2 x 3 without Cross Supports Yellow Part 3002a ×35
  • Brick 2 x 4 without Cross Supports Yellow Part 3001a ×50
  • Brick 2 x 8 Yellow Part 3007 Element 4639693 or 300724 ×9

Windows and Doors 22 pieces

  • Door 1 x 2 x 3 Left with Hollow Studs, Fixed Glass White Part 32bc01 ×2
  • Window 1 x 2 x 2 Classic, Extended Lip, Hollow Studs [with Glass] White Part 3081bc01 ×14
  • Window 1 x 4 x 2 Classic with Long Sill [Complete] White Part 453bc01 ×1
  • Window 1 x 6 x 2 with Shutters [Old Style Extended Lip & Glass] White Part 646bc01 ×5

Plates 3 pieces

  • Plate 4 x 8 with Waffle Bottom White Part 3035a ×3

Bricks Sloped 2 pieces

  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×2

Plants & Trees 1 piece

  • Plant, Tree Flat Oak painted with solid base HO Dark Green Part upn0405 ×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.

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.