BlockTalk Find Your Set

Free tool

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.

Hogwarts Room of Requirement

Checking

75966 Hogwarts Room of Requirement

174 pieces in 73 part and color combinations, plus 4 minifigures.

LEGO counts 193 pieces. This inventory comes from a separate parts catalog and lists 194, including the 20 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.

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.

Show

Piece checklist

Plates 43 pieces

  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×1
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×2
  • Plate 4 x 8 Dark Bluish Gray Part 3035 Element 4211061 ×2
  • Plate 1 x 4 Dark Tan Part 3710 Element 4626904 or 4497088 ×3
  • Plate 2 x 2 Dark Turquoise Part 3022 Element 6249390 or 4170141 ×2
  • Plate 1 x 3 Light Bluish Gray Part 3623 Element 4211429 or 3623194 ×2
  • Plate 1 x 6 Light Bluish Gray Part 3666 Element 4211438 ×2
  • Plate 1 x 2 Medium Nougat Part 3023 Element 6218360 or 4645055 ×1
  • Plate 1 x 1 Tan Part 3024 Element 4159553 or 302405 1 spare in the box ×7
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×11
  • Plate 1 x 3 Tan Part 3623 Element 4121921 or 362305 ×6
  • Plate 1 x 6 Tan Part 3666 Element 4124067 or 366605 ×1
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×1
  • Plate 2 x 8 Tan Part 3034 Element 4113988 or 303405 ×2

Bricks 24 pieces

  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×6
  • Brick 1 x 1 x 5 with Solid Stud Tan Part 2453b Element 4112980 ×2
  • Brick 1 x 2 x 2 with Inside Stud Holder Tan Part 3245c Element 4159279 ×6
  • Brick 1 x 3 Tan Part 3622 Element 4162465 or 4113920 ×4
  • Brick 1 x 6 Tan Part 3009 Element 4112982 or 300905 ×2
  • Brick 1 x 2 x 5 without Side Supports Trans-Dark Blue Part 46212 Element 6613769 or 6251287 ×4

Plates Special 20 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×2
  • Bracket 1 x 2 - 1 x 2 Dark Bluish Gray Part 99781 Element 6214341 ×1
  • Bracket 1 x 2 - 2 x 2 Dark Tan Part 44728 Element 6275485 ×2
  • Plate Special 1 x 2 with Clip Horizontal on End Dark Tan Part 63868 Element 6354662 or 6135610 ×2
  • Plate Special 2 x 8 with Door Rail Light Bluish Gray Part 30586 Element 4222019 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Medium Nougat Part 15573 Element 6292154 or 6218364 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Medium Nougat Part 87580 Element 6102994 ×2
  • Bracket 1 x 2 - 2 x 2 Reddish Brown Part 44728 Element 6117976 or 6075212 ×1
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Reddish Brown Part 92593 Element 6210077 ×1
  • Bracket 1 x 2 - 1 x 2 Tan Part 99781 Element 6249809 or 6092684 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Tan Part 48336 Element 4217562 ×1
  • Plate Special 3 x 2 with Rounded End, Hole Tan Part 3176 Element 6170776 or 6070377 ×2

Tiles 20 pieces

  • Tile 2 x 3 Medium Nougat Part 26603 Element 6187006 ×1
  • Tile 1 x 4 with Groove Reddish Brown Part 2431 Element 4211194 ×1
  • Tile 2 x 2 with Groove Reddish Brown Part 3068b Element 4271949 or 4264030 ×4
  • Tile 1 x 1 with Groove Tan Part 3070b Element 4125253 1 spare in the box ×2
  • Tile 1 x 3 Tan Part 63864 Element 6131896 ×4
  • Tile 1 x 6 with Groove Tan Part 6636 Element 4157277 or 4108151 ×2
  • Tile 2 x 2 Corner Tan Part 14719 Element 6173057 ×4
  • Tile 2 x 4 with Groove Tan Part 87079 Element 6122047 or 4610209 ×2

Bricks Curved 9 pieces

  • Brick Curved 2 x 2 x 2/3 Light Bluish Gray Part 15068 Element 6102357 ×2
  • Brick Arch 1 x 3 x 2 Tan Part 88292 Element 4579306 ×4
  • Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] Tan Part 15254 Element 6106187 or 6052783 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Tan Part 11477 Element 6046922 ×2

Technic Bricks 9 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×8
  • Technic Brick 1 x 4 [3 Pin Holes] Reddish Brown Part 3701 Element 4267994 ×1

Bricks Round and Cones 6 pieces

  • Brick Round 1 x 1 Open Stud Reddish Brown Part 3062b Element 4211183 ×2
  • Brick Round 1 x 1 Open Stud Tan Part 3062b Element 4117070 or 306205 ×4

Bricks Sloped 6 pieces

  • Brick Sloped 75° 2 x 1 x 3 with Hollow Stud Medium Nougat Part 4460b Element 6252197 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Sand Blue Part 3660 Element 6207929 or 4196731 ×4

Energy Effects 4 pieces

  • Wave / Power Blast Rounded Energy with Bar Handle Trans-Light Blue Part 27393 Element 6581317 or 6353237 ×2
  • Flame / Headwear Accessory Plume / Feather, Triple Point Trans-Orange Part 64647 Element 6314353 or 6100044 1 spare in the box ×2

Hinges, Arms and Turntables 4 pieces

  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Tan Part 73983 Element 6102772 or 4227507 ×4

Minifig Accessories 4 pieces

  • Equipment Wand [Individual] Dark Brown Part 36752a Also in Reddish Brown ×2
  • Equipment Wand [Individual] Dark Tan Part 36752a 1 spare in the box ×1
  • Equipment Wand [Individual] Reddish Brown Part 36752a 1 spare in the box Also in Dark Brown ×1

Technic Pins 4 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×2

Tiles Round and Curved 4 pieces

  • Tile 2 x 2 Curved, Macaroni Tan Part 27925 Element 6226565 ×4

Panels 3 pieces

  • Panel 1 x 4 x 3 [Side Supports / Hollow Studs] Black Part 60581 Element 4558209 or 421526 ×1
  • Panel 1 x 4 x 3 [Side Supports / Hollow Studs] Tan Part 60581 Element 6146877 ×1
  • Panel 1 x 6 x 5 Tan Part 59349 Element 4512688 ×1

Animals / Creatures 2 pieces

  • Animal, Otter [Plain] Glitter Trans-Light Blue Part 67631 Element 6314454 ×1
  • Animal, Rabbit / Hare Glitter Trans-Light Blue Part 67900 Element 6300146 ×1

Bricks Special 2 pieces

  • Brick Special 1 x 1 x 3 with 2 Clips Vertical [Hollow Stud, Open O Clips] Tan Part 60583b Element 6320357 or 6055871 ×2

Plates Round Curved and Dishes 2 pieces

  • Plate Round 1 x 1 with Open Stud Trans-Orange Part 85861 Element 6510162 or 6174023 1 spare in the box ×2

Plates Wedged 2 pieces

  • Wedge Plate 4 Stud 45° Angle Plate Dark Bluish Gray Part 15706 Element 6133811 ×2

Windows and Doors 2 pieces

  • Window 1 x 2 x 2 2/3 Pane Lattice Diamond with Rounded Top Black Part 30046 Element 6173105 or 3004626 ×1
  • Door 1 x 4 x 6 Round Top with Window and Keyhole, Reinforced Edge Dark Brown Part 64390 Element 6254792 ×1

Bars, Ladders and Fences 1 piece

  • Fence Lattice 1 x 4 x 1 Black Part 3633 Element 4187209 or 363326 ×1

Stickers 1 piece

  • Sticker Sheet for Set 75966-1 [No Color/Any Color] Part 67832 Element 6299831 ×1

Technic Axles 1 piece

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1

Technic Bushes 1 piece

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×1

Minifigures 4 figures

  • Harry Potter, Open Gryffindor Sweater with Tie Minifigure, checked as a whole figure ×1
  • Luna Lovegood, Ravenclaw Sweater Minifigure, checked as a whole figure ×1
  • Hermione Granger, Gryffindor Sweater with Buttons Minifigure, checked as a whole figure ×1
  • Mechanical Death Eater 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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy