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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 Challenge

Checking

1584 Knights Challenge

132 pieces in 73 part and color combinations, plus 8 minifigures.

LEGO counts 132 pieces. This inventory comes from a separate parts catalog and lists 168, including the 36 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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

Bricks 28 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×3
  • Brick 1 x 3 Black Part 3622 Element 362226 ×4
  • Brick 1 x 1 Blue Part 3005 Element 300523 ×2
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×2
  • Brick 1 x 2 Brown Part 3004 Element 300425 ×1
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×3
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×8
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×4
  • Brick 1 x 8 Yellow Part 3008 Element 300824 ×1

Plates 24 pieces

  • Plate 1 x 10 Black Part 4477 Element 447726 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×1
  • Plate 2 x 10 Black Part 3832 Element 383226 ×2
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×1
  • Plate 1 x 2 Brown Part 3023 Element 302325 ×1
  • Plate 2 x 16 Green Part 4282 Element 6305835 or 4528706 ×1
  • Plate 2 x 4 Green Part 3020 Element 302028 ×1
  • Plate 6 x 8 Green Part 3036 Element 4507311 or 303678 ×1
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 1 x 10 Red Part 4477 Element 447721 ×1
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×1
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×2
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×1
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×4
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×2
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×1

Minifig Shields, Weapons, & Tools 17 pieces

  • Weapon Halberd / Axe Black Part 3848 Element 4118867 or 384826 ×1
  • Weapon Lance Black Part 3849 Element 6345264 or 384926 ×1
  • Weapon Bow and Arrow [Large] Brown Part 4499 Element 449925 ×1
  • Weapon Halberd / Axe Brown Part 3848 Element 384825 ×1
  • Weapon Pike / Spear Round End Brown Part 4497 ×2
  • Weapon Lance Dark Gray Part 3849 Element 384927 ×1
  • Weapon Sword / Shortsword [Shiny Solid Smooth ABS] Dark Gray Part 3847a ×4
  • Shield Triangular with Blue Dragon Print Light Gray Part 3846pr0024 ×3
  • Shield Triangular with Blue Lion, and Yellow Background Print Light Gray Part 3846pr0039 Element 4163363 ×2
  • Shield Triangular with Lion Standing Yellow, and Blue Background Print Light Gray Part 3846pr0038 ×1

Plates Special 14 pieces

  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Red Part 4081b Element 6281994 or 4632572 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thin U Clip] Red Part 4085b Element 4542315 ×4
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Red Part 3794a ×4
  • Plate Special 1 x 1 with Clip Vertical [Thin U Clip] Yellow Part 4085b ×2
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Yellow Part 4623 Element 4501109 or 4497185 ×2

Bricks Sloped 8 pieces

  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Blue Part 4460a ×2
  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Red Part 4460a Element 446021 ×2
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×2

Minifig Accessories 7 pieces

  • Equipment Cup / Mug [Plain] Blue Part 3899 Element 389923 ×1
  • Equipment Goblet / Glass Light Gray Part 2343 Element 4191669 or 626902 ×1
  • Tap 1 x 1 with Hole in Spout Light Gray Part 4599a Element 459902 ×1
  • Equipment Cup / Mug [Plain] Red Part 3899 Element 389921 ×1
  • Equipment Goblet / Glass Red Part 2343 Element 4112042 ×1
  • Equipment Cup / Mug [Plain] White Part 3899 Element 4659665 or 4548546 ×1
  • Equipment Goblet / Glass White Part 2343 Element 4226364 or 4140297 ×1

Bricks Round and Cones 6 pieces

  • Brick Round 1 x 1 Open Stud Blue Part 3062b Element 306223 ×4
  • Cone 2 x 2 x 2, Blocked Open Stud Yellow Part 3942b ×2

Flags, Banners and Signs 6 pieces

  • Flag 4 x 1 Wavy [First Wave Left] Blue Part 4495a ×3
  • Flag 4 x 1 Wavy [First Wave Left] Red Part 4495a ×3

Animal / Creature Accessories 2 pieces

  • Animal / Creature Accessory, Horse Barding with Black Dragons (Black on Blue) Print Blue Part 2490pr0013 ×1
  • Animal / Creature Accessory, Horse Barding with Yellow Lions Print Red Part 2490pr0014 ×1

Animals / Creatures 2 pieces

  • Animal, Horse, Movable Head, Black Eyes Circled with White, Brown Bridle Print Black Part 4493c01pr0002 Element 4225611 or 4107518 ×1
  • Animal, Horse, Movable Head, Black Eyes, Red Bridle Print [Complete Assembly] Brown Part 4493c01pr0003 ×1

Bars, Ladders and Fences 2 pieces

  • Antenna 1 x 4 with Rounded Top Black Part 3957a ×1
  • Fence Lattice 1 x 4 x 1 Blue Part 3633 Element 4106807 or 363323 ×1

Bricks Curved 2 pieces

  • Brick Arch 1 x 5 x 4 [Continuous Bow] Yellow Part 2339 Element 4184555 ×2

Bricks Special 2 pieces

  • Brick Special 1 x 1 with Headlight Light Gray Part 4070 Element 407002 ×2

Hinges, Arms and Turntables 2 pieces

  • Hinge Brick 1 x 2 Base White Part 3937 Element 6619287 or 393701 ×2

Panels 2 pieces

  • Panel 3 x 3 x 6 Corner Wall Red Part 2345 Element 4163329 ×2

Windscreens and Fuselage 2 pieces

  • Windscreen 6 x 6 Octagonal Canopy without Axle hole White Part 2418a ×2

Baseplates 1 piece

  • Baseplate 8 x 24 Green Part 3497 Element 349728 ×1

Containers 1 piece

  • Barrel 2 x 2 x 2 Brown Part 2489 Element 248925 ×1

Minifig Neckwear 1 piece

  • Minifig Neckwear Weapon Arrow Quiver Brown Part 4498 Element 449825 ×1

Plants & Trees 1 piece

  • Plant, Fruit Tree Green Part 3470 Element 347028 ×1

Plates Round Curved and Dishes 1 piece

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Brown Part 4032a Element 403225 ×1

Tiles 1 piece

  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×1

Minifigures 8 figures

  • Knight (Breastplate on Black) - Black Legs, Black Helmet, Red Plume Minifigure, checked as a whole figure ×1
  • Knight (Scale Mail on Blue) - Black Arms, Blue Legs, Black Chin-Guard Minifigure, checked as a whole figure ×1
  • Maiden - White Legs, Red Cone Hat Minifigure, checked as a whole figure ×1
  • Peasant - Red Legs, Brown Hair Minifigure, checked as a whole figure ×1
  • Knight (Crusader Axe) - Red Legs, Chin-Guard Minifigure, checked as a whole figure ×1
  • Knight (Crusader Lion) - Red Legs, Black Neck-Protector Minifigure, checked as a whole figure ×1
  • Knight (Breastplate on Red) - Black Legs, Yellow Plume Minifigure, checked as a whole figure ×1
  • Knight (Breastplate on Blue) - Blue Legs, 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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