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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.

The Knight Bus

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4866 The Knight Bus

269 pieces in 72 part and color combinations, plus 3 minifigures.

The official piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. 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.

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Piece checklist

Dark Purple 107 pieces

  • Brick 1 x 1 Dark Purple Part 3005 Element 6084028 or 4640738 ×16
  • Brick 1 x 2 Dark Purple Part 3004 Element 6104154 or 4640739 ×26
  • Brick 1 x 4 Dark Purple Part 3010 Element 6185995 or 4640611 ×18
  • Brick Arch 1 x 6 Raised Arch Dark Purple Part 92950 Element 6117040 or 4640613 ×3
  • Brick Wedged, Curved Triple 4 x 6 x 2/3 with 4 Studs Dark Purple Part 52031 Element 6262492 or 4517749 ×2
  • Plate 2 x 3 Dark Purple Part 3021 Element 4225142 ×11
  • Tile 1 x 4 with Groove Dark Purple Part 2431 Element 6057988 or 4225185 ×7
  • Window 1 x 2 x 3 Flat Front Dark Purple Part 60593 Element 6262455 or 4640614 ×6
  • Window 1 x 4 x 3 Train with Shutter Holes and Solid Studs on Ends Dark Purple Part 6556 Element 4640740 or 4225262 ×18

Black 77 pieces

  • Flag 2 x 2 Square, Flat Clip Edge [Thick Clips] Black Part 11055 Element 6011815 ×2
  • Hose Rigid 3mm D. 6L / 4.8cm Black Part 75c06 Element 4640742 or 4546459 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×1
  • Plate 1 x 6 Black Part 3666 Element 366626 ×11
  • Plate 1 x 8 Black Part 3460 Element 346026 ×4
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×1
  • Plate 4 x 6 Black Part 3032 Element 303226 ×7
  • Plate 6 x 6 Black Part 3958 Element 395826 ×3
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Black Part 6019 Element 601976 or 601926 ×3
  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×2
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Black Part 92593 Element 4599499 ×9
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×1
  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 ×7
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Tile 1 x 3 Black Part 63864 Element 4558170 ×2
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×5
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 Also in Dark Bluish Gray ×4
  • Tyre Offset Tread with Center Band 23 x 7 Black Part 61254 Element 4541455 ×4
  • Wheel Arch, Mudguard 4 x 2 1/2 x 2 with 2 x 2 Plate Black Part 50745 Element 4260488 ×2

Trans-Clear 29 pieces

  • Glass for Train Window 1 x 4 x 3 Trans-Clear Part 4034 Element 403440 ×18
  • Glass for Window 1 x 2 x 3 Flat Front Trans-Clear Part 60602 Element 6581359 or 6252258 ×6
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 ×2
  • Windscreen 2 x 4 x 2 Vertical Trans-Clear Part 4594 Element 6507908 or 6240532 ×1
  • Windscreen 2 x 6 x 2, Wide Top Trans-Clear Part 4176 Element 4502193 or 4179426 ×2

Light Bluish Gray 21 pieces

  • Antenna 1 x 4 with Flat Top Light Bluish Gray Part 3957b Element 4211473 ×1
  • Bar 1 x 4 x 2 Light Bluish Gray Part 6187 Element 4211584 ×3
  • Brick 2 x 4 Light Bluish Gray Part 3001 Element 4211385 ×1
  • Brick Special 1 x 1 with Clip Vertical [Thick U Clip, Solid Stud] Light Bluish Gray Part 60475a Element 4515357 ×1
  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove Light Bluish Gray Part 44567a Element 4211814 ×1
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×2
  • Plate 4 x 8 Light Bluish Gray Part 3035 Element 4211407 ×1
  • Plate Special 1 x 2 with Clips Horizontal [Thick U-Clips] Light Bluish Gray Part 60470a Element 4537900 ×3
  • Plate Special 2 x 4 with Pins Light Bluish Gray Part 30157 Element 4211572 ×2
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 ×1
  • Wheel 18 x 8 with Fake Bolts and Shallow Spokes Light Bluish Gray Part 56902 Element 4499259 ×4

Reddish Brown 9 pieces

  • Bar 4L (Lightsaber Blade / Wand) Reddish Brown Part 30374 Element 6116613 or 4262974 ×1
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Reddish Brown Part 4032a Element 4211159 ×1
  • Seat / Chair 2 x 2 with Center Sprue Mark Reddish Brown Part 4079b ×2
  • Tile Special 1 x 2 with Handle Reddish Brown Part 2432 Element 4211219 ×1
  • Treasure Chest Bottom with Rear Slots, with Groove Reddish Brown Part 4738b Element 4280114 or 4211162 ×1
  • Treasure Chest Lid [Thick Hinge] Reddish Brown Part 4739a Element 6254220 or 6167676 ×1

Dark Bluish Gray 6 pieces

  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×1
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×1
  • Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole Dark Bluish Gray Part 3940b Element 4211110 ×1
  • Technic Axle and Pin Connector Angled #1 Dark Bluish Gray Part 32013 Element 32013199 or 6296856 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 Also in Black ×2

Tan 6 pieces

  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Tan Part 2654 Element 4278422 or 4140561 ×2
  • Tile 1 x 2 with Sock Print Tan Part 3069bpr0113 Element 4596327 ×2

Blue 4 pieces

  • Lever Small Base with Black Lever Blue Part 298c02 Element 4296152 or 4163988 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Blue Part 4085c Element 408523 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Blue Part 3829c01 Element 9566 ×1

Trans-Yellow 4 pieces

  • Cone 1 x 1 [Top Groove] Trans-Yellow Part 59900 Element 6514022 or 6337597 ×4

White 3 pieces

  • Animal, Bird, Owl Small, Angular Features with Yellow Eyes and Light Bluish Gray Rippled Chest Feathers Print White Part 92084pr0003 Element 6236694 or 6233108 ×1
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End White Part 47457 Element 4494474 ×1
  • Plate 4 x 6 White Part 3032 Element 303201 ×1

Sand Green 1 piece

  • Brick Round 1 x 1 with Shrunken Head Print Sand Green Part 3062bpr0036 Element 4640594 ×1

Trans-Red 1 piece

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 4866-1 [No Color/Any Color] Part 98264 Element 4642443 ×1

Minifigures 3 figures

  • Stan Shunpike, Reddish Brown Shoulder Strap Minifigure, checked as a whole figure ×1
  • Ernie Prang, Dark Bluish Gray Sweater Minifigure, checked as a whole figure ×1
  • Harry Potter, Open Dark Blue Jacket over White Shirt, Black Legs 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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