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LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

A World of LEGO Mosaic 9 in 1

Checking

6163 A World of LEGO Mosaic 9 in 1

598 pieces in 38 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.

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.

  • Brick 1 x 1 Black ×48 Dark Bluish Gray ×26 Black is darker than Dark Bluish Gray.
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Piece checklist

Red 102 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×84
  • Brick Sloped 33° 3 x 1 Red Part 4286 Element 428621 ×2
  • Brick Sloped 45° 2 x 1 Double with Ovoid Bottom Pin Red Part 3044b Element 304421 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×8
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×2

Blue 81 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×77
  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×1
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Blue Part 3660 Element 366023 ×1
  • Brick Special 1 x 1 with Headlight Blue Part 4070 Element 407023 ×1
  • Plate Special 3 x 2 with Rounded End, Hole Blue Part 3176 Element 317673 or 317623 ×1

Black 63 pieces

  • Antenna 1 x 4 with Rounded Top Black Part 3957a ×1
  • Brick 1 x 1 Black Part 3005 Element 300526 Also in Dark Bluish Gray ×48
  • Brick Curved 6 x 1 Black Part 42022 Element 4160393 ×2
  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×2
  • Brick Special 1 x 1 with Studs on 2 Sides Black Part 47905 Element 4214559 ×2
  • Dish 4 x 4 Inverted [Radar] Black Part 3960 Element 396026 ×2
  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×3
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×1
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×1
  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×1

Yellow 56 pieces

  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×56

Medium Blue 52 pieces

  • Brick 1 x 1 Medium Blue Part 3005 Element 4179830 or 4165452 ×52

White 51 pieces

  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×38
  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder White Part 30367b ×2
  • Hinge Brick 1 x 2 Base White Part 3937 Element 6619287 or 393701 ×1
  • Hinge Brick 1 x 2 Top Plate Thin White Part 3938 Element 393801 ×1
  • Plate Special 1 x 1 with Tooth White Part 49668 Element 6601935 or 4224792 ×8
  • Tile Special 1 x 2 Grille with Bottom Groove White Part 2412b Element 6601902 or 241201 ×1

Orange 47 pieces

  • Brick 1 x 1 Orange Part 3005 Element 4173805 or 4119645 ×47

Lime 40 pieces

  • Brick 1 x 1 Lime Part 3005 Element 4220634 or 4122446 ×40

Green 35 pieces

  • Brick 1 x 1 Green Part 3005 Element 300528 ×35

Dark Bluish Gray 26 pieces

  • Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 Also in Black ×26

Reddish Brown 20 pieces

  • Brick 1 x 1 Reddish Brown Part 3005 Element 4211242 ×20

Dark Pink 19 pieces

  • Brick 1 x 1 Dark Pink Part 3005 Element 4492224 or 4245297 ×19

Metallic Silver 2 pieces

  • Plate Round 1 x 1 with Solid Stud Metallic Silver Part 6141 Element 51809301 or 6546105 1 spare in the box ×2

Trans-Clear 2 pieces

  • Baseplate 16 x 16 Trans-Clear Part 3867 Element 4497482 ×2

Trans-Neon Green 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 1 spare in the box ×2

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.

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