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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.

Unicorn Castle

Checking

31175 Unicorn Castle

390 pieces in 153 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

White 99 pieces

  • Animal, Foal, Long Mane, Lavender Tail, Black Eyes Print White Part 112958pr0001 Element 6680795 or 6551708 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×3
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×1
  • Brick 2 x 3 White Part 3002 Element 6550133 or 300251 ×1
  • Brick Arch 1 x 6 Raised Arch White Part 92950 Element 6601942 or 4620761 ×2
  • Brick Curved 1 x 1 White Part 7126 Element 6536331 ×2
  • Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs White Part 49307 Element 6552178 or 6550177 ×7
  • Brick Curved 1 x 2 x 1 2/3 with 1 Cutout White Part 5907 Element 6548968 or 6518954 ×4
  • Brick Curved 1 x 2 x 1 with Curved Top White Part 5841 Element 6552217 or 6519988 ×9
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End White Part 47457 Element 4494474 ×3
  • Brick Curved 2 x 3 White Part 6215 Element 621501 ×1
  • Brick Curved 4 x 2 No Studs White Part 93606 Element 6552144 or 6031947 ×1
  • Brick Curved Inverted 2 x 1 White Part 24201 Element 6601928 or 6172927 ×6
  • Brick Curved Inverted 2 x 2 with 1 x 2 Cutouts White Part 1750 Element 6400127 ×4
  • Brick Round 2 x 2 Dome Bottom [Open Stud] White Part 15395 Element 6050914 ×4
  • Brick Sloped 33° 3 x 1 White Part 4286 Element 6632142 or 428601 ×1
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Round Bottom Pin White Part 2752 Element 6552208 or 6435932 ×2
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×12
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×1
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×2
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×4
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×1
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1
  • Plate 3 x 3 Corner White Part 77844 Element 6548294 or 6428165 ×1
  • Plate 4 x 4 Corner White Part 2639 Element 6552129 or 4508662 ×1
  • Plate 8 x 8 White Part 41539 Element 4624911 or 4529687 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×5
  • Plate Round 4 x 4 with Pin Hole White Part 60474 Element 6564904 or 4515347 ×1
  • Plate Round 6 x 6 with Hole White Part 11213 Element 6601923 or 6109817 ×1
  • Plate Round Corner 2 x 2 with 1 x 1 Cutout White Part 79491 Element 6564910 or 6499714 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] White Part 60897 Element 6330191 or 4613256 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) White Part 15573 Element 6550152 or 6051511 ×4
  • Plate Special 2 x 4 with Groove and Two Center Studs (Jumper) White Part 65509 Element 6550181 or 6315024 ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2
  • Tile Round 1 x 2 Half Circle White Part 1748 Element 6510068 or 6400114 1 spare in the box ×2

Light Aqua 56 pieces

  • Brick 1 x 1 Light Aqua Part 3005 Element 6236576 or 6101288 ×6
  • Brick 1 x 2 Light Aqua Part 3004 Element 6022032 ×2
  • Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] Light Aqua Part 15254 Element 6325976 ×3
  • Brick Arch 1 x 8 x 2 Raised Light Aqua Part 16577 Element 6469798 ×2
  • Brick Curved 3 x 1 No Studs Light Aqua Part 50950 Element 6540137 ×4
  • Brick Round 1 x 1 Open Stud Light Aqua Part 3062b Element 6335549 or 4620902 ×6
  • Brick Round 2 x 2 with Axle Hole Light Aqua Part 3941 Element 6486384 or 6013704 ×8
  • Brick Round, Half 1 x 2 Light Aqua Part 68013 Element 6546460 ×4
  • Brick Sloped Inverted 75° 2 x 1 x 3 Light Aqua Part 2449 Element 6355725 or 6172639 ×2
  • Plate 1 x 2 Light Aqua Part 3023 Element 6146701 or 6015054 ×6
  • Plate 1 x 3 Light Aqua Part 3623 Element 6325961 or 6146704 ×4
  • Plate 1 x 4 Light Aqua Part 3710 Element 6141592 or 6015057 ×2
  • Plate 2 x 10 Light Aqua Part 3832 Element 6355730 ×1
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Light Aqua Part 18674 Element 6393567 or 6311316 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Light Aqua Part 3700 Element 6474261 ×1
  • Tile 2 x 2 Curved, Macaroni Light Aqua Part 27925 Element 6199894 ×2
  • Window 1 x 2 x 2 Castle Light Aqua Part 90195 Element 6546461 or 6287502 ×2

Bright Light Yellow 47 pieces

  • Animal, Bird, Small with Orange Beak, Black Eyes Print Bright Light Yellow Part 41835pr0003 Element 6465604 ×1
  • Animal, Foal with Black Eyes, Bright Light Orange Mane, Tail Print Bright Light Yellow Part 82445pr0003 Element 6551706 ×1
  • Brick 1 x 1 Bright Light Yellow Part 3005 Element 6022084 or 6014502 ×2
  • Brick 1 x 2 Bright Light Yellow Part 3004 Element 6022083 or 6014504 ×8
  • Brick Arch 1 x 4 Bright Light Yellow Part 3659 Element 6250076 or 4240667 ×3
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Bright Light Yellow Part 54200 Element 6296498 1 spare in the box ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Bright Light Yellow Part 85984 Element 6554801 or 6296510 ×7
  • Plate 1 x 1 Bright Light Yellow Part 3024 Element 6554793 or 6058014 1 spare in the box ×8
  • Plate 1 x 2 Bright Light Yellow Part 3023 Element 6554796 or 6201647 ×9
  • Plate 1 x 4 Bright Light Yellow Part 3710 Element 6554799 or 6248756 ×1
  • Plate 2 x 4 Bright Light Yellow Part 3020 Element 6554802 or 6296524 ×1
  • Tile 3 x 3 Curved, Macaroni Bright Light Yellow Part 79393 Element 6546463 ×2
  • Tile Round 1 x 1 Quarter Bright Light Yellow Part 25269 Element 6554798 or 6228969 1 spare in the box ×2

Pearl Gold 25 pieces

  • Cone 1.17 x 1.17 x 2/3 (Fez) Pearl Gold Part 85975 Element 6173139 or 6006217 ×2
  • Creature Body Part, Horn (Unicorn) Pearl Gold Part 89522 Element 6214208 or 4584762 1 spare in the box ×5
  • Creature Body Part, Horn (Unicorn) with Small Pin Pearl Gold Part 7199 Element 6551137 2 spares in the box ×1
  • Crown / Flower / Egg Shell Half Pearl Gold Part 39262 Element 6257048 ×1
  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Pearl Gold Part 64644 Element 4538126 ×1
  • Headwear Accessory Crown Long with Bar Pearl Gold Part 25516 Element 6491216 or 6330618 1 spare in the box ×1
  • Plant, Carrot Pearl Gold Part 33172 Element 6186837 ×1
  • Plate Special 1 x 1 Rounded with Handle Pearl Gold Part 26047 Element 6212377 ×1
  • Plate Special 1 x 1 with Vertical Tooth Pearl Gold Part 15070 Element 6083975 ×2
  • Plate Special Round 1 x 2 Half Circle with Stud (Jumper) Pearl Gold Part 1745 Element 6503258 ×1
  • Tile 1 x 1 Heart Pearl Gold Part 39739 Element 6301811 1 spare in the box ×1
  • Tile Special 1 x 1 with Clip with Rounded Edges Pearl Gold Part 15712 Element 6262138 or 6071259 ×1
  • Tile Special Round 1 x 1 with Hollow Bar Pearl Gold Part 20482 Element 6186672 or 6126113 1 spare in the box ×3
  • Window 1 x 2 x 2 2/3 Pane Lattice Diamond with Rounded Top Pearl Gold Part 30046 Element 6173106 or 4541895 ×1
  • Window Pane Latticed 1 x 2 x 2 Pearl Gold Part 38320 Element 6477142 or 6295686 1 spare in the box ×3

Medium Azure 24 pieces

  • Brick 1 x 1 Medium Azure Part 3005 Element 6603285 or 4619652 ×2
  • Brick Round 2 x 2 with Axle Hole Medium Azure Part 3941 Element 6224282 ×4
  • Cone 2 x 2 x 2, Open Stud Medium Azure Part 3942c Element 6546475 ×2
  • Plate 2 x 2 Medium Azure Part 3022 Element 6603309 or 4625032 ×2
  • Plate Special 1 x 2 Rounded with 2 Open Studs Medium Azure Part 35480 Element 6396673 ×10
  • Tile Round 1 x 2 Half Circle Medium Azure Part 1748 Element 6510074 or 6445337 1 spare in the box ×4

Light Nougat 22 pieces

  • Brick Round 1 x 1 Open Stud Light Nougat Part 3062b Element 6546466 ×12
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Light Nougat Part 85080 Element 6546469 ×9
  • Cone Half 2 x 4 x 3 Light Nougat Part 38317 Element 6546468 ×1

Yellowish Green 22 pieces

  • Brick Round 1 x 1 Open Stud Yellowish Green Part 3062b Element 6546464 ×12
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Yellowish Green Part 85080 Element 6546471 or 6382109 ×5
  • Cone Half 2 x 4 x 3 Yellowish Green Part 38317 Element 6546467 ×1
  • Tile 3 x 3 Curved, Macaroni Yellowish Green Part 79393 Element 6443414 ×2
  • Tile Special Round 1 x 1 with Hollow Bar Yellowish Green Part 20482 Element 6223506 1 spare in the box ×2

Yellow 16 pieces

  • Bracket 1 x 1 - 1 x 1 Yellow Part 36841 Element 6280475 ×2
  • Bracket 1 x 1 - 1 x 2 Inverted Yellow Part 73825 Element 6330893 ×6
  • Brick Special 1 x 1 with Headlight Yellow Part 4070 Element 407024 ×2
  • Plate Round Corners 2 x 6 Double Yellow Part 18980 Element 6116475 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Yellow Part 15573 Element 6092583 ×3
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×1

Tan 9 pieces

  • Plate 1 x 10 Tan Part 4477 Element 4143409 or 447705 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Tan Part 4032a Element 4140562 or 403205 ×1
  • Plate Round 4 x 4 with Pin Hole Tan Part 60474 Element 6302268 ×1
  • Plate Round Corners 2 x 6 Double Tan Part 18980 Element 6210759 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Tan Part 60897 Element 6352222 or 6029889 ×2
  • Window 1 x 2 x 2 2/3 with Rounded Top Tan Part 30044 Element 4623514 or 4200495 ×1
  • Window 1 x 2 x 2 Flat Front Tan Part 60592 Element 6387150 or 6378142 ×1

Dark Azure 8 pieces

  • Brick Round 3 x 3 Dome with Center Stud Dark Azure Part 49308 Element 6546455 ×2
  • Tile Round 1 x 1 Quarter Dark Azure Part 25269 Element 6199887 1 spare in the box ×6

Blue 7 pieces

  • Hinge Brick 1 x 2 Base Blue Part 3937 Element 393723 ×2
  • Hinge Brick 2 x 2 Top Plate Thin Blue Part 6134 Element 4195007 or 4118900 ×2
  • Plate 1 x 1 Blue Part 3024 Element 302423 1 spare in the box ×2
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×1

Dark Pink 7 pieces

  • Animal / Creature Body Part, Wings Double Layer with Anti-Stud Dark Pink Part 6332 Element 6551134 ×1
  • Cone 2 x 2 x 2, Open Stud Dark Pink Part 3942c Element 6559514 ×1
  • Cone 4 x 4 x 2, Axle Hole [Plain] Dark Pink Part 3943b Element 6559511 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Pink Part 4032a Element 6326495 ×2
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Dark Pink Part 18674 Element 6223767 ×2

Trans-Light Blue 7 pieces

  • Brick 2 x 2 without Inside Ridges Trans-Light Blue Part 6223 Element 6508688 ×1
  • Brick Curved 1 x 2 x 1 with Curved Top Trans-Light Blue Part 5841 Element 6526019 ×2
  • Plate Round 1 x 1 with Open Stud Trans-Light Blue Part 85861 Element 6510163 or 6283590 1 spare in the box ×2
  • Tile Round 1 x 1 Quarter Trans-Light Blue Part 25269 Element 6514467 or 6396287 1 spare in the box ×2

Trans-Clear 6 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Clear Part 2654 Element 6581772 or 6163901 ×5
  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Clear Part 30153 Element 6513976 or 6247798 1 spare in the box ×1

Lavender 5 pieces

  • Brick Round 2 x 2 with Axle Hole Lavender Part 3941 Element 6223600 ×3
  • Window 1 x 2 x 2 Castle Lavender Part 90195 Element 6546454 ×2

Bright Light Orange 4 pieces

  • Animal / Creature Body Part, Wings Double Layer with Anti-Stud Bright Light Orange Part 6332 Element 6551132 ×1
  • Cone 2 x 2 x 2, Open Stud Bright Light Orange Part 3942c Element 6559515 ×1
  • Cone 4 x 4 x 2, Axle Hole [Plain] Bright Light Orange Part 3943b Element 6559512 ×1
  • Plate Round 6 x 6 with Hole Bright Light Orange Part 11213 Element 6131694 ×1

Lime 4 pieces

  • Cone 2 x 2 x 2, Open Stud Lime Part 3942c Element 6559516 ×1
  • Cone 4 x 4 x 2, Axle Hole [Plain] Lime Part 3943b Element 6559513 ×1
  • Plant, Carrot Top Lime Part 33183 Element 6420268 1 spare in the box ×1
  • Tile 2 x 2 Curved, Macaroni Lime Part 27925 Element 6441114 or 6349159 ×1

Trans-Dark Pink 4 pieces

  • Cone 1 x 1 [Top Groove] Trans-Dark Pink Part 59900 Element 6514026 or 6337637 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Pink Part 6141 Element 6514060 or 6240230 1 spare in the box ×2
  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Dark Pink Part 30153 Element 6513975 or 6247796 1 spare in the box ×1

Bright Green 3 pieces

  • Plate Round 4 x 4 with Pin Hole Bright Green Part 60474 Element 6530147 ×1
  • Plate Round Corners 2 x 6 Double Bright Green Part 18980 Element 6134287 ×2

Bright Pink 3 pieces

  • Animal, Foal with Black Eyes, Dark Pink Mane, Tail Print Bright Pink Part 82445pr0004 Element 6551707 ×1
  • Tile 3 x 3 Curved, Macaroni Bright Pink Part 79393 Element 6468509 ×2

Trans-Yellow 3 pieces

  • Cone 1 x 1 [Top Groove] Trans-Yellow Part 59900 Element 6514022 or 6337597 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×2

Medium Lavender 2 pieces

  • Brick Round 3 x 3 Dome with Center Stud Medium Lavender Part 49308 Element 6546458 ×1
  • Cone 2 x 2 x 2, Open Stud Medium Lavender Part 3942c Element 6250080 ×1

Coral 1 piece

  • Tile 2 x 2 Curved, Macaroni Coral Part 27925 Element 6250024 ×1

Magenta 1 piece

  • Plate Round 4 x 4 with Pin Hole Magenta Part 60474 Element 6096210 ×1

Orange 1 piece

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Orange Part 4032a Element 6030521 or 4164243 ×1

Red 1 piece

  • Technic Pin 1/2 with Friction Red Part 89678 Element 6378120 1 spare in the box ×1

Reddish Orange 1 piece

  • Dish 6 x 6 Inverted (Radar) with Solid Studs Reddish Orange Part 44375b Element 6483785 ×1

Trans-Bright Green 1 piece

  • Cone 1 x 1 [Top Groove] Trans-Bright Green Part 59900 Element 6514024 or 6337628 ×1

Trans-Purple 1 piece

  • Cone 1 x 1 [Top Groove] Trans-Purple Part 59900 Element 6514023 or 6337603 ×1

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

When a piece really is missing

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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.

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