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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.

The Big Bang Theory

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21302 The Big Bang Theory

470 pieces in 170 part and color combinations, plus 7 minifigures.

LEGO counts 484 pieces. This inventory comes from a separate parts catalog and lists 498, including the 28 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.

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Piece checklist

Plates 116 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box Also in Dark Blue ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×1
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 1 x 1 Dark Blue Part 3024 Element 6554188 or 4184108 1 spare in the box Also in Black ×1
  • Plate 1 x 1 Dark Green Part 3024 Element 6618077 or 6055169 1 spare in the box ×3
  • Plate 1 x 2 Dark Green Part 3023 Element 6618076 or 6013797 ×2
  • Plate 1 x 2 Dark Orange Part 3023 Element 4570877 or 4162217 ×10
  • Plate 2 x 10 Dark Orange Part 3832 Element 6351327 or 6131797 ×3
  • Plate 16 x 16 Dark Tan Part 91405 Element 4613196 ×1
  • Plate 6 x 16 Dark Tan Part 3027 Element 6109751 or 4570878 ×2
  • Plate 1 x 1 Red Part 3024 Element 302421 2 spares in the box ×3
  • Plate 1 x 1 Reddish Brown Part 3024 Element 4221744 2 spares in the box ×20
  • Plate 1 x 10 Reddish Brown Part 4477 Element 4223683 ×3
  • Plate 1 x 3 Reddish Brown Part 3623 Element 4211152 ×3
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×5
  • Plate 2 x 10 Reddish Brown Part 3832 Element 4211214 ×2
  • Plate 2 x 2 Reddish Brown Part 3022 Element 4613975 or 4216695 ×1
  • Plate 2 x 4 Reddish Brown Part 3020 Element 4211186 ×1
  • Plate 1 x 1 Tan Part 3024 Element 4159553 or 302405 2 spares in the box ×13
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×11
  • Plate 1 x 3 Tan Part 3623 Element 4121921 or 362305 ×1
  • Plate 1 x 4 Tan Part 3710 Element 4113233 or 371005 ×4
  • Plate 1 x 8 Tan Part 3460 Element 4114324 or 346005 ×4
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×16
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×1

Bricks 88 pieces

  • Brick 1 x 2 Dark Orange Part 3004 Element 4579659 or 4164441 ×7
  • Brick 1 x 1 Medium Nougat Part 3005 Element 6057986 or 4569624 ×10
  • Brick 1 x 1 x 5 with Solid Stud Medium Nougat Part 2453b Element 6339311 or 6102979 ×1
  • Brick 1 x 1 Reddish Brown Part 3005 Element 4211242 ×9
  • Brick 1 x 2 Reddish Brown Part 3004 Element 4613963 or 4211149 ×1
  • Brick 1 x 4 Reddish Brown Part 3010 Element 4211225 ×4
  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×7
  • Brick 1 x 2 Tan Part 3004 Element 4109995 or 300405 ×12
  • Brick 1 x 3 Tan Part 3622 Element 4162465 or 4113920 ×13
  • Brick 1 x 8 Tan Part 3008 Element 4159774 or 4124002 ×16
  • Brick 2 x 2 Corner Tan Part 2357 Element 4124455 or 4112541 ×6
  • Brick 1 x 1 with Red 'Rice' [Chinese] Print White Part 3005pr0013 Element 6122960 ×2

Tiles 75 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1
  • Tile 1 x 1 with Groove Blue Part 3070b Element 4206330 or 307073 2 spares in the box ×4
  • Tile 1 x 2 with Groove Blue Part 3069b Element 306923 ×3
  • Tile 1 x 8 with Groove Blue Part 4162 Element 416223 ×2
  • Tile 2 x 4 with Groove Blue Part 87079 Element 4654678 or 4560180 ×2
  • Tile 1 x 1 with Groove Dark Blue Part 3070b Element 6554193 or 4631385 2 spares in the box ×3
  • Tile 1 x 6 with Groove Dark Blue Part 6636 Element 4252437 ×2
  • Tile 1 x 1 with Groove Dark Bluish Gray Part 3070b Element 4210848 2 spares in the box ×4
  • Tile 1 x 2 with Joystick and Vehicle Control Panel Print Dark Bluish Gray Part 3069bpr0090 Element 4221879 ×1
  • Tile 1 x 2 with Van der Graaf Generator Print Dark Bluish Gray Part 3069bpr0151 Element 6122993 ×1
  • Tile 1 x 2 with Groove Dark Orange Part 3069b Element 4614158 or 4178112 ×2
  • Tile 1 x 2 with Vintage Radio Set Print Dark Orange Part 3069bpr0150 Element 6122989 ×1
  • Tile 1 x 1 with Groove Dark Red Part 3070b Element 4550169 or 4187196 1 spare in the box ×8
  • Tile 1 x 2 with Groove Dark Red Part 3069b Element 4539090 or 4529548 ×4
  • Tile 1 x 2 with Groove Green Part 3069b Element 306928 ×1
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×1
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×2
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×2
  • Tile 1 x 2 with Groove Reddish Brown Part 3069b Element 4211151 ×2
  • Tile 1 x 4 with Groove Reddish Brown Part 2431 Element 4211194 ×1
  • Tile 2 x 2 with Suspension Bridge Print Reddish Brown Part 3068bpr0273 Element 6122977 ×1
  • Tile 1 x 1 with Groove Tan Part 3070b Element 4125253 1 spare in the box ×4
  • Tile 1 x 2 with Groove Tan Part 3069b Element 4114026 ×12
  • Tile 1 x 4 with Groove Tan Part 2431 Element 4550324 or 4542398 ×2
  • Tile 1 x 8 with Groove Tan Part 4162 Element 4544139 or 4519964 ×4
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2
  • Tile 1 x 2 with Computer Keyboard Standard Print White Part 3069bpr0030 Element 4293350 ×1
  • Tile 2 x 2 with Newspaper 'THE LEGO NEWS volume 3' Print White Part 3068bpr0201 Element 4655208 ×1
  • Tile 2 x 4 with Physics Equations Print White Part 87079pr0080 Element 6122997 ×1

Bricks Special 41 pieces

  • Brick Special 1 x 1 with Headlight Dark Bluish Gray Part 4070 Element 4211044 ×2
  • Brick Special 1 x 1 with Stud on 1 Side Dark Orange Part 87087 Element 4666322 ×4
  • Brick Special 1 x 1 with Headlight Green Part 4070 Element 4187334 or 4109676 ×1
  • Brick Special 1 x 2 with Masonry Brick Profile Medium Nougat Part 98283 Element 4656783 ×11
  • Brick Special 1 x 4 with Masonry Brick Profile Medium Nougat Part 15533 Element 6055309 ×6
  • Brick Special 1 x 1 with Headlight Reddish Brown Part 4070 Element 4225469 ×6
  • Brick Special 1 x 1 with Stud on 1 Side Tan Part 87087 Element 4579260 ×11

Minifig Accessories 35 pieces

  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Black Part 64644 Element 4538456 ×1
  • Tap 1 x 1 without Hole in Spout Black Part 4599b Element 459926 1 spare in the box ×2
  • Tap 1 x 1 without Hole in Spout Blue Part 4599b Element 459923 1 spare in the box ×4
  • Equipment Cupcake Holder [Kitchen Implements Kit] Bright Light Orange Part 97784 ×3
  • Equipment Cutlery - Fork [Kitchen Implements Kit] Bright Light Orange Part 97781 ×3
  • Equipment Cutlery - Knife [Kitchen Implements Kit] Bright Light Orange Part 97782 ×3
  • Equipment Dish / Plate Round [Kitchen Implements Kit] Bright Light Orange Part 97783 ×3
  • Equipment Dish Rectangular [Kitchen Implements Kit] Bright Light Orange Part 97785 ×1
  • Equipment Frying Pan [Kitchen Implements Kit] Bright Light Orange Part 97790 ×1
  • Equipment Hand Mixer [Kitchen Implements Kit] Bright Light Orange Part 97793 ×1
  • Equipment Measuring Jug [Kitchen Implements Kit] Bright Light Orange Part 97791 ×1
  • Equipment Spatula [Kitchen Implements Kit] Bright Light Orange Part 97787 ×1
  • Equipment Sextant Dark Bluish Gray Part 30154 Element 6269999 or 4217675 ×1
  • Tap 1 x 1 without Hole in Spout Green Part 4599b Element 6122830 or 4239271 1 spare in the box ×1
  • Equipment Crystal Ball Globe 2 x 2 x 2 Medium Azure Part 30106 Element 6124846 ×1
  • Lipstick with Light Bluish Gray Handle Medium Lavender Part 93094pat0001 Element 6160206 or 6079542 ×1
  • Equipment Cup / Mug [Plain] Red Part 3899 Element 389921 ×1
  • Lipstick with Light Bluish Gray Handle Red Part 93094pat0001 Element 6528712 or 6160205 ×1
  • Tap 1 x 1 without Hole in Spout Red Part 4599b Element 459921 1 spare in the box ×4
  • Equipment Crystal Ball Globe 2 x 2 x 2 Trans-Clear Part 30106 Element 6507889 or 6274736 ×1

Plates Special 28 pieces

  • Bracket 1 x 2 - 1 x 2 Black Part 99781 Element 6016172 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×1
  • Plate Special 1 x 2 with Angled Handles on Side Black Part 92692 Element 4604304 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End Black Part 63868 Element 6336989 or 4535739 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Black Part 87580 Element 6663108 or 4565323 Also in Dark Blue ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Blue Part 87580 Element 6389696 or 4565320 Also in Black ×3
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Red Part 87580 Element 4613761 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Tan Part 15573 Element 6092591 ×3
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Tan Part 87580 Element 6126075 or 4578032 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Green Part 87580 Element 6389692 or 4565321 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Medium Blue Part 15573 Element 6092601 ×3
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Orange Part 15573 Element 6092599 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Orange Part 87580 Element 6126063 or 6013635 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Reddish Brown Part 15573 Element 6092590 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Tan Part 61252 Element 6347292 or 4520947 ×2
  • Plate Special 1 x 2 with Door Rail Tan Part 32028 Element 4239062 or 4160483 ×1
  • Plate Special 4 x 4, Studs on One Edge with Higgs Boson Particle Pictionary Whiteboard Print White Part 6179pr0015 Element 6123000 ×1

Plates Round Curved and Dishes 18 pieces

  • Dish 2 x 2 Inverted [Radar] Black Part 4740 Element 474026 ×1
  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 2 spares in the box ×5
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Blue Part 4032a Element 403223 ×1
  • Plate Round 4 x 4 with Pin Hole Dark Brown Part 60474 Element 6005030 ×1
  • Plate Round 1 x 1 with Solid Stud Green Part 6141 Element 4569058 or 4519965 1 spare in the box ×1
  • Dish 2 x 2 Inverted [Radar] Light Bluish Gray Part 4740 Element 4211512 ×1
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×2
  • Plate Round 4 x 4 with Pin Hole Light Bluish Gray Part 60474 Element 4515351 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×1
  • Plate Round Corner 4 x 4 Tan Part 30565 Element 4570516 or 4295315 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×1

Bricks Round and Cones 16 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2
  • Cone 1 x 1 [Top Groove] Black Part 59900 Element 4529236 ×4
  • Brick Round 1 x 1 with Fins, Open Stud Dark Bluish Gray Part 4588 Element 6331222 or 6321195 ×1
  • Cone 1 x 1 [Top Groove] Flat Silver Part 59900 Element 6121350 2 spares in the box ×2
  • Brick Round 2 x 2 with Axle Hole Reddish Brown Part 3941 Element 4211166 ×2
  • Cone 1 x 1 [Top Groove] Trans-Red Part 59900 Element 6514021 or 6337596 ×1
  • Cone 1 x 1 [Top Groove] Trans-Yellow Part 59900 Element 6514022 or 6337597 ×2
  • Brick Round 1 x 1 Open Stud White Part 3062b Element 6619283 or 306201 ×1
  • Brick Round 2 x 2 Truncated Cone White Part 98100 Element 6609536 or 4649167 ×1

Bricks Curved 8 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Reddish Brown Part 6091 Element 6335567 or 6035547 ×2
  • Brick Curved 1 x 4 x 1 1/3 No Studs Reddish Brown Part 10314 Element 6035561 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Tan Part 6091 Element 6411329 or 4273526 ×4

Panels 5 pieces

  • Panel 1 x 1 x 1 Corner Light Bluish Gray Part 6231 Element 4215513 ×2
  • Panel 1 x 2 x 1 [Rounded Corners] Light Bluish Gray Part 4865b Element 6146223 ×2
  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Reddish Brown Part 87552 Element 6064188 or 4618541 ×1

Tiles Special 5 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Black Part 15712 Element 6335388 or 6066102 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×2
  • Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×1

Bars, Ladders and Fences 4 pieces

  • Bar 1L with Top Stud and Two Side Studs Light Bluish Gray Part 92690 Element 4640844 or 4600518 ×1
  • Bar 3L Light Bluish Gray Part 87994 Element 6093527 or 6064033 1 spare in the box ×1
  • Bar 1 x 4 x 2 with Studs White Part 4083 Element 408301 ×1
  • Bar 6L with Stop Ring White Part 63965 Element 6170419 or 6081986 ×1

Minifig Neckwear 4 pieces

  • Minifig Neckwear Bracket [One Stud] Black Part 42446 Element 6020192 or 4261427 1 spare in the box ×4

Technic Bricks 4 pieces

  • Technic Brick 1 x 1 with Pin Hole Blue Part 6541 Element 4119014 ×1
  • Technic Brick 1 x 1 with Pin Hole Reddish Brown Part 6541 Element 4620075 or 4528461 ×3

Technic Pins 4 pieces

  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 2 spares in the box ×4

Windows and Doors 4 pieces

  • Door 1 x 4 x 6 Smooth with Chamfered Handle Plinth Nougat Part 60616b Element 6058086 ×1
  • Glass for Window 1 x 4 x 6 Trans-Clear Part 57895 Element 6581671 or 6256058 ×1
  • Door Frame 1 x 4 x 6 Type 2 White Part 60596 Element 6262945 or 4541956 ×1
  • Window 1 x 4 x 6 Frame with 3 Panes White Part 57894 Element 6271168 or 4507543 ×1

Minifig Shields, Weapons, & Tools 3 pieces

  • Weapon Gun / Pistol / Revolver Large Barrel, Long Grip Dark Bluish Gray Part 30132 Element 6359933 or 6056822 1 spare in the box ×1
  • Weapon Harpoon [Smooth Shaft] Flat Silver Part 18041 Element 6162578 or 6078471 1 spare in the box ×1
  • Weapon Lightsaber Hilt with Bottom Ring White Part 64567 Element 6615554 or 6040333 1 spare in the box ×1

Hinges, Arms and Turntables 2 pieces

  • Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×1
  • Hinge Brick 1 x 2 Base Light Bluish Gray Part 3937 Element 4211469 ×1

Minifigs 2 pieces

  • Minifig Trophy Statuette Blue Part 90398 Element 6122835 1 spare in the box ×1
  • Minifig Trophy Statuette Dark Red Part 90398 Element 6301335 or 6107894 1 spare in the box ×1

Tiles Round and Curved 2 pieces

  • Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box Also in White ×1
  • Tile Round 1 x 1 White Part 98138 Element 6564903 or 6284572 1 spare in the box Also in Trans-Clear ×1

Animals / Creatures 1 piece

  • Animal, Dog, Chihuahua with Basic Face Print Medium Nougat Part 12888pr0001 Element 6102951 or 6029295 ×1

Stickers 1 piece

  • Sticker Sheet for Set 21302-1 [No Color/Any Color] Part 23931 Element 6126972 or 6126970 ×1

Supports, Girders and Cranes 1 piece

  • Support Round 2 x 2 x 2 Stand with Reinforced Underside Black Part 19798 Element 6106280 ×1

Technic Special 1 piece

  • Technic Ball Joint Light Bluish Gray Part 32474 Element 6070731 or 4585707 ×1

Tools 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Tubes and Hoses 1 piece

  • Hose Rigid 3mm D. 8L / 6.4cm Light Bluish Gray Part 75c08 Element 4514192 ×1

Minifigures 7 figures

  • Sheldon Cooper Minifigure, checked as a whole figure ×1
  • Raj Koothrappali Minifigure, checked as a whole figure ×1
  • Penny Minifigure, checked as a whole figure ×1
  • Leonard Hofstadter Minifigure, checked as a whole figure ×1
  • Howard Wolowitz Minifigure, checked as a whole figure ×1
  • Bernadette Rostenkowski Minifigure, checked as a whole figure ×1
  • Amy Farrah Fowler 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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