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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.

Sentry and Catapult

Checking

4863 Sentry and Catapult

41 pieces in 30 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

Reddish Brown 16 pieces

  • Duplo Brick 1 x 2 x 2 with Nailed Crossed Wooden Boards Print Reddish Brown Part 4066pr0005 Element 4261180 ×6
  • Duplo Car Base, 2 x 6 with Black Wheels and Open Hitch End Reddish Brown Part 2312c03 Element 4539900 or 4261096 ×1
  • Duplo Catapult Arm Reddish Brown Part 52365 Element 4257445 ×1
  • Duplo Catapult Base Reddish Brown Part 52366 Element 4257447 ×1
  • Duplo Flagpole / Antenna 1 x 9 Reddish Brown Part 51708 Element 4585937 or 4249081 ×3
  • Duplo Horse Harness Reddish Brown Part 31169 Element 4505570 ×1
  • Duplo Ladder 8 Rung Reddish Brown Part 2224 Element 4249975 ×1
  • Duplo Plate 2 x 4 Reddish Brown Part 40666 Element 4251777 ×2

Black 10 pieces

  • Duplo Armor with Silver Helmet with Black Top, and Red and Yellow Breastplate and Dragon Print Black Part 51727pr0001 Element 4253855 ×1
  • Duplo Brick 2 x 2 Black Part 3437 Element 4583790 or 343726 ×1
  • Duplo Brick 2 x 2 Slope 45° Black Part 6474 Element 4168694 ×2
  • Duplo Brick 2 x 2 x 2 Black Part 31110 Element 4261331 or 4143307 ×2
  • Duplo Brick 2 x 4 Black Part 3011 Element 4513081 or 4290069 ×1
  • Duplo Brick 4 x 3 x 3 Wry Inverted Black Part 51732 Element 4278721 ×1
  • Duplo Ladder Stand Black Part 2223 Element 4192604 ×1
  • Duplo Shield, Angled Triangle with Black Dragon on Yellow and Red Background Print Black Part 51711pr0002 Element 4251781 ×1

Red 4 pieces

  • Duplo Flag Wavy 2 x 5 with Castle Dragon Print Red Part 51725pr0001 Element 4252462 ×2
  • Duplo Plate 1 x 2 with Overhang with Dragon Print Red Part 42236pr0005 Element 4496664 ×1
  • Duplo Plate Special 4 x 6 with Studs on Edge Red Part 31465 Element 4143158 ×1

Pearl Light Gray 3 pieces

  • Duplo Broadaxe Pearl Light Gray Part 51996 Element 4280313 or 4252642 ×1
  • Duplo Shield, Angled Triangle with Lion Looking Left and Crown on Yellow and Blue Background Print Pearl Light Gray Part 51711pr0004 Element 4288096 or 4251823 ×1
  • Duplo Sword, Thick Pearl Light Gray Part 51714 Element 4280312 or 4252450 ×1

Bright Green 2 pieces

  • Duplo Plate 2 x 4 Bright Green Part 40666 Element 4170795 ×1
  • Duplo Plate 4 x 8 Bright Green Part 4672 Element 6048851 or 4279293 ×1

Blue 1 piece

  • Duplo Figure with Rounded Head with Dark Bluish Gray Legs, Blue Chest, White Arms, Dark Bluish Gray Hands Blue Part 51741pr0002 Element 4595995 or 4265816 ×1

Bright Light Orange 1 piece

  • Duplo Figure with Rounded Head with Black Legs, Black Dragon on Shield, Red Arms, Dark Bluish Gray Hands, Smile Print Bright Light Orange Part 51741pr0005 Element 4265815 ×1

Dark Bluish Gray 1 piece

  • Ball, Hard Plastic, 51mm (approx. 6 studs diameter) Dark Bluish Gray Part 41250 Element 4250473 ×1

Metallic Silver 1 piece

  • Duplo Armor with Yellow Top Feather and Blue and Yellow Breastplate with Lion and Crown Print Metallic Silver Part 51728pr0002 Element 4253812 ×1

White 1 piece

  • Duplo Animal Horse with One Stud and Moveable Head, Eyes Print White Part 75725pr0001 Element 4261500 or 4260391 ×1

Yellow 1 piece

  • Duplo Flag Wavy 2 x 5 with Lion and Crown Print Yellow Part 51725pr0002 Element 4251824 ×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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