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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.

Umbaran MHC

Checking

30243 Umbaran MHC

49 pieces in 25 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.

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Piece checklist

Light Bluish Gray 19 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Light Bluish Gray Part 48729b Element 6278156 or 4542590 1 spare in the box ×1
  • Bracket 1 x 2 - 1 x 2 Light Bluish Gray Part 99781 Element 4654582 ×1
  • Brick Curved 3 x 1 No Studs Light Bluish Gray Part 50950 Element 4251163 ×6
  • Hinge Brick 2 x 2 Top Plate Thin Light Bluish Gray Part 6134 Element 4211881 ×1
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Light Bluish Gray Part 3794b ×1
  • Plate Special 1 x 2 with Door Rail Light Bluish Gray Part 32028 Element 4211568 ×1
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Light Bluish Gray Part 60478 Element 4515369 ×6

Blue 14 pieces

  • Cone 1 x 1 [Top Groove] Blue Part 59900 Element 4529235 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End Blue Part 63868 Element 6354661 or 4568990 ×12
  • Wheel Arch, Curved Wedge 4 x 3 with 2 x 2 Opening and 4 Studs Blue Part 47755 Element 4626361 ×1

Dark Bluish Gray 9 pieces

  • Bar 6L with Stop Ring Dark Bluish Gray Part 63965 Element 6170420 or 6081987 ×1
  • Brick Curved 2 x 2 with Lip, No Studs Dark Bluish Gray Part 30602 Element 6454668 or 4210931 ×1
  • Brick Sloped 30° 1 x 2 x 2/3 Dark Bluish Gray Part 85984 Element 4567887 ×1
  • Hinge Brick 1 x 2 Base Dark Bluish Gray Part 3937 Element 4211066 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×2
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×2
  • Tile Special 1 x 2 with Handle Dark Bluish Gray Part 2432 Element 4211039 ×1

Black 2 pieces

  • Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs Black Part 75937 Element 6018805 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×1

Trans-Orange 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 1 spare in the box ×2

Flat Silver 1 piece

  • Arm Mechanical with Clip [Thick Support] Flat Silver Part 98313 Element 6262193 or 6008483 ×1

Trans-Clear 1 piece

  • Brick Round 2 x 2 with Axle Hole Trans-Clear Part 3941 Element 6514281 or 6273152 ×1

Trans-Light Blue 1 piece

  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×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.

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