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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.

Santa's Holiday Sleigh Adventure

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40866 Santa's Holiday Sleigh Adventure

179 pieces in 71 part and color combinations, plus 2 minifigures.

The official piece count includes the 9 parts inside the set's minifigures, which this inventory lists separately; the remaining difference of 1 piece is within the tolerance of the catalog data.

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

Plates 43 pieces

  • Plate 2 x 4 Black Part 3020 Element 302026 ×2
  • Plate 1 x 1 x 2/3 with Open Stud Blue Part 86996 Element 6432005 ×1
  • Plate 1 x 6 Green Part 3666 Element 366628 ×1
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×1
  • Plate 2 x 2 Medium Azure Part 3022 Element 6603309 or 4625032 ×1
  • Plate 1 x 1 Orange Part 3024 Element 4524929 or 4203454 ×1
  • Plate 1 x 1 Pearl Gold Part 3024 Element 6069887 ×10
  • Plate 1 x 1 x 2/3 with Open Stud Red Part 86996 Element 6397571 ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×8
  • Plate 1 x 4 Red Part 3710 Element 371021 ×5
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 2 x 4 Red Part 3020 Element 302021 ×5
  • Plate 1 x 8 Reddish Brown Part 3460 Element 4216945 ×2
  • Plate 2 x 6 Reddish Brown Part 3795 Element 4211247 ×2
  • Plate 4 x 8 Tan Part 3035 Element 4509897 or 4191103 ×1

Plates Special 29 pieces

  • Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper) Dark Green Part 34103 Element 6584849 ×2
  • Plate Special 2 x 2 with Only 2 studs Dark Green Part 33909 Element 6484031 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted Green Part 99207 Element 6493342 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Green Part 15573 Element 6092586 ×6
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Light Bluish Gray Part 32828 Element 6227897 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Medium Azure Part 99207 Element 6441006 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Medium Azure Part 15573 Element 6603587 or 6331949 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Pearl Gold Part 48336 Element 4585493 ×2
  • Bracket 1 x 1 - 1 x 1 Inverted Red Part 36840 Element 6249907 ×4
  • Bracket 1 x 2 - 1 x 2 Red Part 99781 Element 6319330 ×2
  • Bracket 1 x 2 - 1 x 4 [Rounded Corners at Bottom, Square Corners at Top] Red Part 28802 Element 6168619 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted Red Part 99207 Element 6001806 ×1
  • Bracket 1 x 1 - 1 x 1 Inverted Reddish Brown Part 36840 Element 6238874 ×2
  • Plate Special 1 x 1 x 2/3 Half Round with Side Stud Reddish Brown Part 3386 Element 6585083 ×2

Bricks Curved 24 pieces

  • Brick Curved 2 x 2 x 2/3 Dark Green Part 15068 Element 6618100 or 6101285 ×1
  • Brick Arch 1 x 3 x 1 2/3 Curved Top Red Part 5843 Element 6548926 ×2
  • Brick Curved 1 x 1 Red Part 7126 Element 6536991 ×2
  • Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs Red Part 49307 Element 6278441 ×2
  • Brick Curved 1 x 2 x 1 with Curved Top Red Part 5841 Element 6544439 ×6
  • Brick Curved 2 x 2 x 2/3 Red Part 15068 Element 6105976 ×1
  • Brick Curved 3 x 1 x 2/3 Red Part 7302 Element 6586666 ×2
  • Brick Curved, 3 x 1 with 1/3 Inverted Cutout Red Part 70681 Element 6365716 ×2
  • Brick Arch 1 x 3 x 1 2/3 Curved Top Reddish Brown Part 5843 Element 6576892 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Reddish Brown Part 11477 Element 6069984 ×2
  • Brick Curved 2 x 1 with Inverted Cutout Reddish Brown Part 78666 Element 6365885 ×2

Plates Round Curved and Dishes 24 pieces

  • Plate Special 1 x 2 Rounded with 2 Open Studs Green Part 35480 Element 6210271 ×6
  • Plate Round 1 x 1 with Solid Stud Lavender Part 6141 Element 6606762 ×2
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 ×6
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×8

Tiles Special 12 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Green Part 15712 Element 6494113 ×4
  • Tile Special 1 x 1 with Clip with Rounded Edges Pearl Gold Part 15712 Element 6262138 or 6071259 ×8

Plants & Trees 10 pieces

  • Plant, Carrot Top Bright Green Part 33183 Element 4119479 ×1
  • Plant, Carrot Orange Part 33172 Element 6424015 or 6103249 ×1
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Pearl Gold Part 24866 Element 6209691 ×8

Bricks Special 6 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Red Part 87087 Element 4558886 ×4
  • Brick Special 1 x 4 with 4 Studs on One Side Red Part 30414 Element 4177991 or 4157223 ×2

Tiles 6 pieces

  • Tile 1 x 2 with Groove Medium Nougat Part 3069b Element 6021997 ×2
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×2
  • Tile 1 x 3 Reddish Brown Part 63864 Element 6100769 ×2

Animals / Creatures 4 pieces

  • Animal, Reindeer Baby with Dark Brown Antlers Print Medium Nougat Part 114662pr0001 Element 6667307 or 6599996 ×1
  • Animal, Reindeer Baby with Dark Brown Antlers Print Medium Nougat Part 14662pr0001 ×1
  • Animal, Reindeer with Dark Brown Antlers, White Front Medium Nougat Part 51591pr0001 Element 6638729 or 6310336 ×2

Bricks Round and Cones 4 pieces

  • Brick Round 1 x 1 Open Stud Magenta Part 3062b Element 6172869 ×1
  • Brick Round Curved 1 x 1 x 1 Quarter Dome Red Part 5848 Element 6585072 ×2
  • Brick Round 1 x 1 Open Stud Yellow Part 3062b Element 306844 or 306224 ×1

Bricks Sloped 4 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Lime Part 54200 Element 4504372 or 4298015 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Red Part 85984 Element 4651524 ×2

Bars, Ladders and Fences 3 pieces

  • Bar 4L (Lightsaber Blade / Wand) Pearl Gold Part 30374 Element 6147169 or 4600267 ×1
  • Curled Decorative Ornament / Plant Vine with Bar Pearl Gold Part 28870 Element 6172437 ×2

Tiles Round and Curved 3 pieces

  • Tile Round 1 x 1 Quarter Dark Green Part 25269 Element 6315608 ×2
  • Tile Round 2 x 2 with Bottom Stud Holder Light Bluish Gray Part 14769 Element 6052200 ×1

Animal / Creature Body Parts 2 pieces

  • Animal Body Part, Cat Tail Reddish Brown Part 15429 Element 6528152 or 6222217 ×2

Bricks 2 pieces

  • Brick 1 x 2 Medium Nougat Part 3004 Element 4569382 ×2

Tubes and Hoses 2 pieces

  • Cable, Flexible 21L with 2 Connectors and Bars Dark Green Part 2630 Element 6608514 ×2

Bricks Wedged 1 piece

  • Brick Wedged, Curved 3 x 4 x 2/3 Cutout Red Part 11291 Element 6179656 or 6016772 ×1

Minifigures 2 figures

  • Santa, Black Boots, 3626cpr3560 Head, 102264 Hat Minifigure, checked as a whole figure ×1
  • Mrs. Claus, Red Dress, Gold Glasses 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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