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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.

Knights' Castle

Checking

4777 Knights' Castle

168 pieces in 65 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.

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Piece checklist

Duplo, Quatro and Primo 163 pieces

  • Duplo Animal Horse with One Stud and Moveable Head, Eyes Print Black Part 75725pr0001 Element 4143789 ×1
  • Duplo Armor with Black Helmet with Silver Top, and Red and Yellow Breastplate and Dragon Print Black Part 51727pr0002 Element 4253865 ×1
  • Duplo Armor with Silver Helmet with Black Top, and Red and Yellow Breastplate and Dragon Print Black Part 51727pr0001 Element 4253855 ×1
  • Duplo Brick 1 x 2 x 2 Black Part 4066 Element 4519300 or 4170963 Also in Dark Bluish Gray ×3
  • Duplo Brick 1 x 2 x 2 with Shield, Lion and Crown on Yellow and Blue Background Print Black Part 4066pr0004 ×4
  • Duplo Brick 1 x 2 x 2 with Side Cutouts and Channel in Top Black Part 42234 Element 4249892 ×2
  • Duplo Brick 2 x 10 x 2 Arch with Stonework Print Black Part 51704pr9999 Element 4254417 ×1
  • Duplo Brick 2 x 2 Black Part 3437 Element 4583790 or 343726 Also in Dark Bluish Gray ×12
  • Duplo Brick 2 x 2 Slope 45° Black Part 6474 Element 4168694 ×4
  • Duplo Brick 2 x 4 Black Part 3011 Element 4513081 or 4290069 Also in Dark Bluish Gray ×2
  • Duplo Broadaxe Black Part 51996 Element 4251750 ×1
  • Duplo Ladder Stand Black Part 2223 Element 4192604 ×1
  • Duplo Plate 2 x 4 Black Part 40666 Element 4192931 Also in Dark Bluish Gray ×2
  • Duplo Pot / Kettle with Handles Black Part 31330 Element 4169157 ×1
  • Duplo Shield, Angled Triangle with Black Dragon on Yellow and Red Background Print Black Part 51711pr0002 Element 4251781 ×2
  • Duplo Spiked Flail / Mace Black Part 51731 Element 4249239 ×1
  • Duplo Sword, Thick Black Part 51714 Element 4249250 ×1
  • Duplo Trap Door Grate 4 x 4 Black Part 51706 Element 4590452 or 4520240 ×2
  • Duplo Brick 1 x 2 x 2 Dark Bluish Gray Part 4066 Element 4249768 Also in Black ×1
  • Duplo Brick 2 x 2 Dark Bluish Gray Part 3437 Element 4583792 or 4583551 Also in Black ×5
  • Duplo Brick 2 x 2 x 2 Dark Bluish Gray Part 31110 Element 4210954 ×19
  • Duplo Brick 2 x 2 x 2 with Vertical Grooves Dark Bluish Gray Part 41978 Element 6030503 or 4249990 ×8
  • Duplo Brick 2 x 4 Dark Bluish Gray Part 3011 Element 4513086 or 4290096 Also in Black ×1
  • Duplo Brick 2 x 4 x 2 Dark Bluish Gray Part 31111 Element 4251779 ×1
  • Duplo Brick 2 x 4 x 2 with Lion and Crown on Yellow and Blue Shield Print Dark Bluish Gray Part 31111pr9990 ×1
  • Duplo Brick 4 x 3 x 3 Wry Inverted Dark Bluish Gray Part 51732 Element 4249085 ×13
  • Duplo Building Wall 1 x 8 x 8 with Door Opening - Castle Dark Bluish Gray Part 51695 Element 4249071 ×3
  • Duplo Building Wall 1 x 8 x 8 with Window Opening - Castle Dark Bluish Gray Part 51697 Element 4249072 ×3
  • Duplo Plate 2 x 4 Dark Bluish Gray Part 40666 Element 4216423 or 4210822 Also in Black ×4
  • Duplo Plate 2 x 8 Dark Bluish Gray Part 44524 Element 6252061 or 4222136 ×1
  • Duplo Plate 3 x 4 x 2 1/3 Rampart Dark Bluish Gray Part 51698 Element 4249073 ×13
  • Duplo Treasure Chest 2 x 4 x 3 Dark Red Part 48036 Element 4249895 ×1
  • Duplo Brick 2 x 2 Dark Tan Part 3437 Element 4583544 or 4196360 ×5
  • Duplo Brick 2 x 4 Dark Tan Part 3011 Element 4290092 or 4196412 ×2
  • Duplo Plate 2 x 8 Dark Tan Part 44524 Element 4196414 ×1
  • Duplo Plate 8 x 16 Dark Tan Part 6490 Element 4610559 or 4583191 ×2
  • Duplo Armor with Blue Top Feather and Blue and Yellow Breastplate with Lion and Crown Print Metallic Silver Part 51728pr0001 ×1
  • Duplo Armor with Yellow Top Feather and Blue and Yellow Breastplate with Lion and Crown Print Metallic Silver Part 51728pr0002 Element 4253812 ×1
  • Duplo Horse Battle Helmet Metallic Silver Part 51907 Element 4252568 ×1
  • Duplo Treasure / Gold Pearl Gold Part 48647 Element 4279735 ×1
  • 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 ×2
  • Duplo Sword, Thick Pearl Light Gray Part 51714 Element 4280312 or 4252450 ×1
  • Duplo Flag Wavy 2 x 5 with Castle Dragon Print Red Part 51725pr0001 Element 4252462 ×1
  • Duplo Horse Barding with Silver Armor and Dragon with Red and Yellow Background Print Red Part 51710pr0001 Element 4578914 or 4252563 ×1
  • Duplo Wave (Fire, Water, Flame) 2 x 1 x 5 with Marbled Bright Light Orange Tip Red Part 51703pr0001 ×2
  • Duplo Catapult Arm Reddish Brown Part 52365 Element 4257445 ×1
  • Duplo Catapult Base Reddish Brown Part 52366 Element 4257447 ×1
  • Duplo Crossbow (51786) Reddish Brown Part 51786 Element 4249086 ×1
  • Duplo Door 1 x 4 x 4 with Rounded Top and Handle - Castle Reddish Brown Part 51288 Element 4244411 ×3
  • Duplo Door Sliding Grille 6 x 7 Reddish Brown Part 51702 Element 4249075 ×1
  • Duplo Fence 1 x 6 x 2 Reddish Brown Part 31021 Element 4614479 or 4588072 ×2
  • Duplo Flagpole / Antenna 1 x 9 Reddish Brown Part 51708 Element 4585937 or 4249081 ×3
  • Duplo Ladder 8 Rung Reddish Brown Part 2224 Element 4249975 ×1
  • Duplo Plate 2 x 2 with Handle Reddish Brown Part 44699 Element 4520295 or 4252652 ×2
  • Duplo Plate 2 x 4 Reddish Brown Part 40666 Element 4251777 ×3
  • Duplo Plate 8 x 16 Reddish Brown Part 6490 Element 4251259 ×1
  • Duplo Plate 8 x 8 with Trap Door Opening Reddish Brown Part 51705 Element 4249078 ×3
  • Duplo Table Round 4 x 4 x 1.5 Reddish Brown Part 31066 Element 4541862 or 4251775 ×1
  • Duplo Flag Wavy 2 x 5 with Lion and Crown Print Yellow Part 51725pr0002 Element 4251824 ×2

Non-Buildable Figures (Duplo, Fabuland, etc) 4 pieces

  • Duplo Figure with Rounded Head with Black Legs, Black Dragon on Shield, Red Arms, Dark Bluish Gray Hands, Angry Print Bright Light Orange Part 51741pr0019 ×1
  • Duplo Figure with Rounded Head with Black Legs, Red Chest, Bright Light Orange Arms and Hands, Smirk Red Part 51741pr0012 ×1
  • Duplo Figure with Rounded Head with Dark Bluish Gray Legs, White Chest, Blue Arms, Dark Bluish Gray Hands (Old Knight) White Part 51741pr0006 Element 4595997 or 4265814 ×1
  • Duplo Figure with Rounded Head with Dark Bluish Gray Legs, White Chest, Yellow Arms, Dark Bluish Gray Hands White Part 51741pr0003 Element 4265813 ×1

Technic Special 1 piece

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