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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.

Computer Science & AI 6-8 Replacement Pack

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45547 Computer Science & AI 6-8 Replacement Pack

232 pieces in 68 part and color combinations, plus 4 minifigures.

The 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.

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Piece checklist

Plates Special 44 pieces

  • Plate Special 2 x 2 with Pin on Bottom Black Part 2476a Element 6328479 ×6
  • Plate Special 2 x 2 with Rubber Foot Black Part 109373 Element 6492701 ×4
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×4
  • Plate Special 1 x 4 x 2/3 with 1 x 2 Bottom Cutout Coral Part 7769 Element 6598033 ×4
  • Bracket 1 x 2 - 2 x 2 Dark Turquoise Part 44728 Element 6429966 or 6249425 ×2
  • Plate Special 1 x 4 with 2 Studs with Groove [New Underside] Dark Turquoise Part 41740 Element 6250120 ×6
  • Plate Special 2 x 2 with 2 Pin Holes Light Bluish Gray Part 2817 Element 4211376 ×4
  • Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale) Light Bluish Gray Part 71752 Element 6609654 ×6
  • Technic Plate 2 x 6 [5 Holes] Light Bluish Gray Part 32001 Element 4211542 ×2
  • Plate Special 1 x 2 with Three Teeth [Tri-Tooth] White Part 15208 Element 6046381 ×4
  • Technic Plate 2 x 8 [7 Holes] White Part 3738 Element 4527945 or 373801 ×2

Bricks 24 pieces

  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×2
  • Brick 2 x 4 Bright Light Orange Part 3001 Element 6100027 or 4645053 ×2
  • Brick 2 x 2 Coral Part 3003 Element 6422920 ×4
  • Brick 2 x 2 Dark Turquoise Part 3003 Element 6314091 or 4120399 ×4
  • Brick 2 x 4 Dark Turquoise Part 3001 Element 6249422 or 6235115 ×2
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×2
  • Brick 2 x 4 Medium Lavender Part 3001 Element 6013583 or 4655173 ×2
  • Brick 2 x 4 Red Part 3001 Element 300121 ×2
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×4

Bricks Special 24 pieces

  • Bracket 5 x 1 x 1 1/3 Black Part 5712 Element 6484901 ×4
  • Brick Special 2 x 2 with Pin and Axle Hole Black Part 6232 Element 6365577 or 6070692 ×4
  • Brick Special 2 x 4 with 3 Axle Holes Black Part 39789 Element 6244917 ×4
  • Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder Light Bluish Gray Part 86876 Element 6383177 ×4
  • Brick Special 1 x 2 with Pin - Bottom Stud Holder White Part 44865 Element 6406522 ×6
  • Technic Brick 2 x 4 with 4 Pin Holes, 2 Pins White Part 112174 Element 6598035 ×2

Technic Bricks 18 pieces

  • Technic Brick 1 x 6 [5 Pin Holes] Black Part 3894 Element 389426 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Coral Part 32064a Element 6439447 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Turquoise Part 3700 Element 6345402 or 4140338 ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Light Bluish Gray Part 3702 Element 4211442 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] White Part 3701 Element 6601913 or 370101 ×4
  • Technic Brick 5 x 6 Right Angle Double White Part 7469 Element 6548852 ×2

Plates Round Curved and Dishes 16 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×4
  • Plate Round Corner 3 x 3 Dark Turquoise Part 30357 Element 6251838 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×4
  • Plate Round 4 x 4 with Pin Hole White Part 60474 Element 6564904 or 4515347 ×2
  • Plate Round Corner 3 x 3 with 2 x 2 Round Cutout White Part 68568 Element 6552185 or 6339103 ×4

Bricks Sloped 12 pieces

  • Brick Sloped Inverted 45° 2 x 1 Coral Part 3665 Element 6467785 ×4
  • Brick Sloped 33° 3 x 2 Dark Turquoise Part 3298 Element 6611552 or 6442379 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Trans-Clear Part 3040b Element 6507936 or 6277460 ×4

Technic Pins 12 pieces

  • Technic Pin without Friction Ridges Lengthwise Yellow Part 3673 Element 6331822 ×12

Bricks Round and Cones 10 pieces

  • Brick Round 2 x 2 D. Tube with 45° Elbow and Axle Holes (Crossholes) at Each End [LONG] Trans-Clear Part 5489 Element 6611557 ×4
  • Brick Round 2 x 2 with Axle Hole Trans-Clear Part 3941 Element 6514281 or 6273152 ×6

Technic Axles 10 pieces

  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2
  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×6

Technic Connectors 10 pieces

  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Black Part 32530 Element 4144024 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Coral Part 59443 Element 6544409 ×4
  • Technic Pin Connector Round 1L [Beam] Dark Turquoise Part 18654 Element 6295149 ×4

Technic Gears 8 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×2
  • Technic Gear 28 Tooth Double Bevel Light Bluish Gray Part 46372 Element 6259270 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×2

Tiles Round and Curved 8 pieces

  • Tile Round 2 x 4 Coral Part 66857 Element 6611550 ×4
  • Tile Round 2 x 2 with Black Circle, White Circles / Eye Print White Part 14769pr9967 Element 6522844 ×4

Tiles Special 8 pieces

  • Tile Special Round 2 x 2 with Hole Dark Turquoise Part 15535 Element 6491435 ×4
  • Tile Special 2 x 2 with Top Pin [Squared Holes] White Part 49153 Element 6313138 ×4

Bricks Curved 6 pieces

  • Brick Arch 1 x 6 x 2 Curved Top Dark Turquoise Part 6183 Element 6383990 ×2
  • Brick Curved 1 x 4 x 2 2/3 Trans-Clear Part 65734 Element 6510199 or 6288587 ×4

Plates 6 pieces

  • Plate 2 x 4 Coral Part 3020 Element 6305455 ×4
  • Plate 4 x 4 Corner White Part 2639 Element 6552129 or 4508662 ×2

String, Bands and Reels 6 pieces

  • Chain 16L [21 Links] Light Bluish Gray Part 60169 Element 6292172 or 4512049 ×2
  • Technic Rubber Belt Extra Large [Round Cross Section] Light Bluish Gray Part 7336 Element 6598034 ×2
  • Technic Rubber Belt Medium [24mm ID] [Round Cross Section] Red Part 85544 Element 4544145 or 4544143 ×2

Technic Special 4 pieces

  • Pulley, 2-Stage Black Part 7335 Element 6598041 ×4

Tubes and Hoses 4 pieces

  • Axle Hose, Soft 11L Black Part 32199 Element 4234438 or 4121646 ×2
  • Axle Hose, Soft 7L White Part 32580 Element 6212046 ×2

Technic Beams 2 pieces

  • Technic Beam 1 x 3 Thick with Center Axle Hole Dark Turquoise Part 7229 Element 6549315 ×2

Minifigures 4 figures

  • Monochrome Bright Green Minifigure, checked as a whole figure ×1
  • Monochrome Red, 28621 Head Minifigure, checked as a whole figure ×1
  • Monochrome Blue Minifigure, checked as a whole figure ×1
  • Monochrome Bright Light Orange, 28621 Head 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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