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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.

Royal Knight's Catapult

Checking

1843-3 Royal Knight's Catapult

43 pieces in 29 part and color combinations, plus 1 minifigure.

The piece count includes the 4 parts inside the set's minifigures, which this inventory lists separately. 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.

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Piece checklist

Black 19 pieces

  • Antenna 1 x 4 with Rounded Top Black Part 3957a ×1
  • Construction Vehicle Bucket 2 x 3 Curved Bottom, Hollow, with Hinge 2 Fingers Black Part 4626 Element 462626 ×1
  • Flexible Hose 8.5L with Tabbed Ends (Ends same color as Tube) Black Part 73590c02a Element 4540890 or 621130 ×1
  • Hinge Plate 1 x 6 with 2 and 3 Fingers On Ends Black Part 4504 Element 4256462 or 4160816 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 1 x 6 Black Part 3666 Element 366626 ×1
  • Plate 1 x 8 Black Part 3460 Element 346026 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×2
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Black Part 6019 Element 601976 or 601926 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Black Part 4085c Element 408526 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×2
  • Plate Special 1 x 4 with Wheels Holder Black Part 2926 Element 6338416 or 292626 ×2

Blue 13 pieces

  • Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Blue Part 3307 Element 330723 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Blue Part 3040b Element 4121936 or 304023 ×4
  • Brick Special 1 x 2 with Pin Blue Part 2458 Element 245823 ×2
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Blue Part 6019 Element 601973 or 601923 ×2
  • Plate Special 2 x 2 with 2 Pin Holes Blue Part 2817 Element 4118899 or 281723 ×1
  • Tile Special 1 x 2 with Handle Blue Part 2432 Element 243223 ×1

Brown 6 pieces

  • Weapon Halberd / Axe Brown Part 3848 Element 384825 ×1
  • Weapon Pike / Spear Round End Brown Part 4497 ×1
  • Wheel Wagon Small (27mm D.) Brown Part 2470 Element 4248114 or 247075 ×4

White 3 pieces

  • Flag 4 x 1 Wavy [First Wave Left] White Part 4495a ×1
  • Shield Ovoid with Royal Knights Lion Head Print White Part 2586pr0013 Element 82338 ×1
  • Shield Triangular with Lion Head, Red and White Background Print White Part 3846pr0023 ×1

Light Gray 2 pieces

  • Brick 1 x 2 Light Gray Part 3004 Element 300402 ×2

Minifigures 1 figure

  • Knight (Royal Knights) - Blue Legs, Dark Gray Neck-Protector Minifigure, checked as a whole figure ×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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