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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.

King Boo and the Haunted Yard Expansion Set

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71377 King Boo and the Haunted Yard Expansion Set

431 pieces in 144 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

Black 82 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 Also in Dark Bluish Gray ×7
  • Brick Sloped 30° 1 x 2 x 2/3 Black Part 85984 Element 4548180 ×1
  • Brick Sloped 33° 3 x 2 Black Part 3298 Element 329826 ×5
  • Brick Sloped 33° 3 x 3 Double Convex Black Part 3675 Element 367526 ×8
  • Brick Sloped 45° 2 x 2 Double Convex Black Part 3045 Element 4189064 or 304526 ×2
  • Gate 1 x 4 x 9 Arched with Bars and Three Studs Black Part 42448 Element 6008363 or 4169414 ×2
  • Insect, Spider with Elongated Tail Section Black Part 29111 Element 6234806 ×2
  • Plant, Flower Stem with Bar and 6 Stems Black Part 19119 Element 6299824 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Dark Bluish Gray ×3
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×2
  • Plate Special 1 x 2 with Handles on Ends Black Part 18649 Element 6099483 ×4
  • Plate Special 1 x 4 with 2 Studs with Groove [New Underside] Black Part 41740 Element 6254045 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×5
  • Technic Beam 1 x 6 Thin Black Part 32063 Element 6163980 or 4114634 ×2
  • Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 ×2
  • Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×4
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×3
  • Technic Pin Connector Round [Slotted] Black Part 62462 Element 6173119 or 4526982 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×12
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×1
  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 ×2
  • Tile 2 x 2 Corner Black Part 14719 Element 6133722 ×2
  • Tile 2 x 2 with Explosion and Barcode Print (Sticker) Black Part 3068bpr0053 Element 6319932 ×4
  • Weapon Spear Tip with Fins Black Part 24482 Element 6269965 or 6135009 ×2

Reddish Brown 82 pieces

  • Brick 1 x 2 x 2 with Inside Stud Holder Reddish Brown Part 3245c Element 6172808 or 4609329 ×1
  • Brick Arch 1 x 3 x 2 Reddish Brown Part 88292 Element 6186577 ×2
  • Brick Arch 1 x 4 Reddish Brown Part 3659 Element 6177697 or 6088713 ×4
  • Brick Arch 1 x 6 Raised Arch Reddish Brown Part 92950 Element 4655611 ×2
  • Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] Reddish Brown Part 15254 Element 6177998 ×2
  • Brick Curved 1 x 3 x 2 Inverted [Inside Bow] Reddish Brown Part 18653 Element 6133833 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Reddish Brown Part 11477 Element 6069984 ×8
  • Brick Round 1 x 1 Open Stud Reddish Brown Part 3062b Element 4211183 ×2
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Reddish Brown Part 85080 Element 6322211 or 4638308 ×8
  • Brick Special 1 x 2 Palisade [aka Log] Reddish Brown Part 30136 Element 4211180 ×5
  • Brick Special 1 x 2 with Groove Reddish Brown Part 4216 Element 6103004 or 4242336 ×2
  • Brick Special 1 x 2 with Vertical Clip [Open O Clip] Reddish Brown Part 30237b Element 6330202 or 6127734 ×8
  • Brick Special 1 x 4 Palisade [aka Log] Reddish Brown Part 30137 Element 4211181 ×7
  • Feet, 2 x 2 x 2/3 with 4 Studs on Top Reddish Brown Part 66858 Element 6300006 ×2
  • Plate 1 x 2 Reddish Brown Part 3023 Element 4211150 ×1
  • Plate 2 x 2 Reddish Brown Part 3022 Element 4613975 or 4216695 ×2
  • Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs Reddish Brown Part 66792 Element 6299920 ×7
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Reddish Brown Part 15573 Element 6092590 ×2
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Reddish Brown Part 18674 Element 6102360 ×2
  • Technic Brick 1 x 1 with Pin Hole Reddish Brown Part 6541 Element 4620075 or 4528461 ×2
  • Tile 1 x 2 with Groove Reddish Brown Part 3069b Element 4211151 ×1
  • Tile 2 x 2 Corner Reddish Brown Part 14719 Element 6221608 ×1
  • Wedge Plate 2 x 2 Cut Corner Reddish Brown Part 26601 Element 6218366 ×4
  • Wedge Plate 4 Stud 45° Angle Plate Reddish Brown Part 15706 Element 6084573 ×4
  • Window 1 x 2 x 2 2/3 with Rounded Top Reddish Brown Part 30044 Element 4542131 or 4224625 ×2

Dark Bluish Gray 64 pieces

  • Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 ×2
  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 Also in Black ×4
  • Brick 1 x 2 x 5 with Hollow Studs Dark Bluish Gray Part 2454b Element 4211075 ×8
  • Brick Curved 4 x 2 No Studs Dark Bluish Gray Part 93606 Element 6005668 ×2
  • Brick Sloped 75° 2 x 2 x 3 [Solid Studs] Dark Bluish Gray Part 98560 Element 6000853 ×2
  • Brick Special 1 x 1 with Clip Vertical [Open O Clip, Hollow Stud] Dark Bluish Gray Part 60475b Element 6321350 or 4580437 ×2
  • Brick Special 1 x 2 with Masonry Brick Profile Dark Bluish Gray Part 98283 Element 6000311 ×4
  • Brick Special 1 x 2 with Vertical Clip [Open O Clip] Dark Bluish Gray Part 30237b Element 6335306 or 6127738 ×4
  • Brick Special 1 x 2 x 1 2/3 with 8 Studs on 3 Sides Dark Bluish Gray Part 67329 Element 6314192 ×4
  • Brick Wedged 2 x 2 Facet Dark Bluish Gray Part 87620 Element 4624186 ×9
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in Black ×12
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Dark Bluish Gray Part 60483 Element 6265093 or 6006141 ×2
  • Technic Brick 1 x 6 [5 Pin Holes] Dark Bluish Gray Part 3894 Element 4210917 or 3894199 ×2
  • Window 1 x 2 x 2 Castle Dark Bluish Gray Part 90195 Element 6181291 ×4

White 36 pieces

  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×7
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×7
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×6
  • Brick Curved 1 x 2 x 1 No Studs White Part 37352 Element 6552172 or 6248827 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] White Part 3660 Element 366001 ×1
  • Insect Accessory, Spider Web, Hanging White Part 90981 Element 6549520 or 6006221 ×5
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×1
  • Plate 6 x 6 White Part 3958 Element 6552116 or 4144012 ×1
  • Technic Beam 1 x 3 Thick White Part 32523 Element 6632140 or 4208160 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×1
  • Technic Gear Rack 1 x 4 White Part 3743 Element 6457281 or 4250465 ×2
  • Tile 6 x 6 with King Boo Face Print White Part 10202pr0008 Element 6318695 ×1

Blue 32 pieces

  • Bracket 1 x 2 - 2 x 2 Inverted Blue Part 99207 Element 6133720 ×4
  • Brick 2 x 2 with Star with Eyes Print Blue Part 3003pr0139 Element 6309028 ×1
  • Brick Curved Inverted 2 x 1 Blue Part 24201 Element 6308097 ×8
  • Brick Special 1 x 2 with 2 Studs on 1 Side Blue Part 11211 Element 6189191 ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Blue Part 4032a Element 403223 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Blue Part 60897 Element 6352221 or 4613257 ×8
  • Technic Gear 20 Tooth Double Bevel with Clutch on Both Sides Blue Part 35185 Element 6224999 ×2
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 ×1
  • Tile 2 x 2 with Star and Barcode Print (Sticker) Blue Part 3068bpr0036 Element 6315998 ×1

Light Bluish Gray 28 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Bluish Gray Part 3040b Element 4211614 ×1
  • Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Light Bluish Gray Part 32952 Element 6225242 ×2
  • Hinge Plate 2 x 4 with Pin Hole with 2 Holes - Bottom Light Bluish Gray Part 43056 Element 6258903 ×1
  • Hinge Plate 2 x 4 with Pin Hole with 2 Holes - Top Light Bluish Gray Part 43045 Element 6256117 ×1
  • Plate 1 x 6 Light Bluish Gray Part 3666 Element 4211438 ×2
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×2
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 ×2
  • Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs Light Bluish Gray Part 66792 Element 6294703 ×6
  • Plate Special 1 x 2 with Door Rail Light Bluish Gray Part 32028 Element 4211568 ×2
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×1
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Light Bluish Gray Part 42195 Element 6273212 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 ×1
  • Technic Plate 2 x 8 [7 Holes] Light Bluish Gray Part 3738 Element 4211449 ×1
  • Technic Worm Gear Type 2 Light Bluish Gray Part 32905 Element 6185471 ×1
  • Tile 2 x 2 with Coin and Barcode Print (Sticker) Light Bluish Gray Part 3068bpr0060 Element 6316006 ×2

Dark Orange 25 pieces

  • Brick Curved 2 x 2 x 2/3 Dark Orange Part 15068 Element 6104344 ×4
  • Plate 1 x 2 Dark Orange Part 3023 Element 4570877 or 4162217 ×5
  • Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs Dark Orange Part 66792 Element 6308871 ×4
  • Plate Round Corners 6 x 6 x 2/3 Circle with Reduced Knobs Dark Orange Part 66789 Element 6301632 ×2
  • Plate Round Corners 8 x 8 x 2/3 Circle with Reduced Knobs Dark Orange Part 66790 Element 6301642 ×4
  • Tile 2 x 2 with Goomba Face with Low Furrowed Brow and Curved Mouth Print Dark Orange Part 3068bpr0439 Element 6319790 ×2
  • Tile 2 x 2 with Goomba and Barcode Print (Sticker) Dark Orange Part 3068bpr9978 Element 6315663 ×2
  • Tile 2 x 2 with Groove Dark Orange Part 3068b Element 6186423 ×2

Dark Azure 17 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Azure Part 54200 Element 6133838 ×8
  • Plate 1 x 2 Dark Azure Part 3023 Element 4653988 ×4
  • Plate Special 2 x 2 with Center Stud (Jumper) with Two Black Curved Lines Print Dark Azure Part 87580pr0002 Element 6318696 ×4
  • Tile 2 x 2 with King Boo and Barcode Print (Sticker) Dark Azure Part 3068bpr0052 Element 6323470 ×1

Dark Tan 13 pieces

  • Brick Sloped 33° 3 x 1 Dark Tan Part 4286 Element 6015454 or 4247147 ×2
  • Plate 2 x 12 Dark Tan Part 2445 Element 6322219 or 4268715 ×1
  • Plate 2 x 3 Dark Tan Part 3021 Element 6035540 or 6015192 ×1
  • Plate 2 x 4 Dark Tan Part 3020 Element 4497077 or 4267874 ×1
  • Plate 2 x 8 Dark Tan Part 3034 Element 4246957 ×7
  • Tile 1 x 3 Dark Tan Part 63864 Element 6015452 ×1

Red 10 pieces

  • Bar 2L with Towball Red Part 22484 Element 6364359 or 6323083 ×1
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×3
  • Tile Round 1 x 1 Red Part 98138 Element 6284574 or 6063445 ×4

Tan 9 pieces

  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×1
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 ×6
  • Technic Pin Long without Friction Ridges, with Anti-Roll Notch Tan Part 39888 Element 6321305 ×1
  • Tile Special Round 2 x 2 with Hole Tan Part 15535 Element 6115248 ×1

Yellow 9 pieces

  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Yellow Part 60470b Element 6337231 or 4556156 ×4
  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×3
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 ×2

Magenta 8 pieces

  • Wedge Plate 2 x 2 Cut Corner Magenta Part 26601 Element 6249742 ×8

Pearl Gold 8 pieces

  • Crown / Flower / Egg Shell Half Pearl Gold Part 39262 Element 6257048 ×1
  • Window 1 x 2 x 2 2/3 Pane Lattice Diamond with Rounded Top Pearl Gold Part 30046 Element 6173106 or 4541895 ×3
  • Window Pane Latticed 1 x 2 x 2 Pearl Gold Part 38320 Element 6477142 or 6295686 ×4

Dark Brown 7 pieces

  • Brick Arch 1 x 3 x 3 [Gothic] Dark Brown Part 13965 Element 6177917 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Brown Part 54200 Element 6259071 or 6033014 ×3
  • Brick Sloped 65° 2 x 1 x 2 Dark Brown Part 60481 Element 4624089 ×1
  • Door 1 x 4 x 6 Round Top with Window and Keyhole, Reinforced Edge Dark Brown Part 64390 Element 6254792 ×1

Lime 1 piece

  • Brick Round 2 x 2 with Axle Hole Lime Part 3941 Element 4527943 or 4279733 ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

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