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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.

London Magnet Build

Checking

854012 London Magnet Build

27 pieces in 22 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

Tan 8 pieces

  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×1
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×4
  • Plate Special 1 x 2 with Three Teeth [Tri-Tooth] Tan Part 15208 Element 6046907 ×1
  • Tile 1 x 2 with Groove Tan Part 3069b Element 4114026 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Tan Part 2412b Element 4124456 or 393305 ×1

Blue 3 pieces

  • Brick Special 1 x 1 with Headlight Blue Part 4070 Element 407023 ×1
  • Plate 4 x 8 Blue Part 3035 Element 303523 ×1
  • Tile Round 2 x 2 with Bottom Stud Holder Blue Part 14769 Element 6133844 ×1

Dark Bluish Gray 3 pieces

  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×1
  • Tile Round 1 x 1 Quarter Dark Bluish Gray Part 25269 Element 6199549 ×2

Green 3 pieces

  • Brick 1 x 3 Green Part 3622 Element 4109679 or 362228 ×2
  • Tile 1 x 8 with Groove Green Part 4162 Element 4296081 or 4238505 ×1

Reddish Brown 3 pieces

  • Bracket 1 x 1 - 1 x 1 Inverted Reddish Brown Part 36840 Element 6238874 ×1
  • Brick Special 1 x 1 with Stud on 1 Side Reddish Brown Part 87087 Element 6062574 or 4618545 ×1
  • Plate 1 x 1 Reddish Brown Part 3024 Element 4221744 ×1

Light Bluish Gray 2 pieces

  • Cone 1 x 1 [Top Groove] Light Bluish Gray Part 59900 Element 4529241 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×1

Bright Green 1 piece

  • Plant, Carrot Top Bright Green Part 33183 Element 4119479 ×1

Lime 1 piece

  • Brick Magnet, 4 x 4 Lime Part 49555 Element 6256037 ×1

Medium Blue 1 piece

  • Tile 1 x 1 with Groove Medium Blue Part 3070b Element 4527526 or 4235958 ×1

White 1 piece

  • Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs White Part 75937 Element 6009016 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 854012-1 [No Color/Any Color] Part 854012 Element 6299886 ×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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