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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.

Birds

Checking

21301 Birds

580 pieces in 177 part and color combinations.

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 251 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box ×14
  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Dark Bluish Gray ×4
  • Plate 1 x 3 Black Part 3623 Element 362326 ×5
  • Plate 2 x 2 Black Part 3022 Element 302226 Also in Dark Bluish Gray ×3
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 Also in Dark Bluish Gray ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in Black ×6
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 Also in Black ×4
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 Also in Black ×1
  • Plate 2 x 4 Dark Tan Part 3020 Element 4497077 or 4267874 ×1
  • Plate 2 x 8 Dark Tan Part 3034 Element 4246957 ×13
  • Plate 1 x 2 Green Part 3023 Element 302328 ×5
  • Plate 1 x 3 Green Part 3623 Element 4107758 or 362328 ×1
  • Plate 2 x 2 Green Part 3022 Element 302228 ×2
  • Plate 2 x 2 Corner Green Part 2420 Element 4157120 or 242028 ×5
  • Plate 2 x 3 Green Part 3021 Element 302128 ×1
  • Plate 2 x 4 Green Part 3020 Element 302028 ×1
  • Plate 6 x 16 Green Part 3027 Element 6584863 or 6032912 ×1
  • Plate 8 x 8 Green Part 41539 Element 4161677 ×2
  • Plate 1 x 1 Light Bluish Gray Part 3024 Element 4211399 2 spares in the box ×10
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×7
  • Plate 1 x 3 Light Bluish Gray Part 3623 Element 4211429 or 3623194 ×4
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×5
  • Plate 2 x 2 Corner Light Bluish Gray Part 2420 Element 4211353 ×6
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×4
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×5
  • Plate 4 x 4 Light Bluish Gray Part 3031 Element 4243797 or 4211403 ×1
  • Plate 1 x 1 Medium Blue Part 3024 Element 4179826 1 spare in the box ×4
  • Plate 1 x 2 Medium Blue Part 3023 Element 4179825 or 4165460 ×16
  • Plate 1 x 3 Medium Blue Part 3623 Element 6170268 or 6070671 ×4
  • Plate 1 x 4 Medium Blue Part 3710 Element 4179828 ×6
  • Plate 2 x 3 Medium Blue Part 3021 Element 6411808 or 6111618 ×3
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×3
  • Plate 1 x 3 Red Part 3623 Element 362321 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×3
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×3
  • Plate 2 x 2 Corner Red Part 2420 Element 242071 or 242021 ×4
  • Plate 2 x 6 Red Part 3795 Element 379521 ×1
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×2
  • Plate 1 x 1 Reddish Brown Part 3024 Element 4221744 1 spare in the box ×3
  • Plate 1 x 2 Reddish Brown Part 3023 Element 4211150 ×11
  • Plate 1 x 3 Reddish Brown Part 3623 Element 4211152 ×7
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×5
  • Plate 1 x 6 Reddish Brown Part 3666 Element 4221590 ×3
  • Plate 2 x 2 Reddish Brown Part 3022 Element 4613975 or 4216695 ×1
  • Plate 2 x 2 Corner Reddish Brown Part 2420 Element 4211257 ×4
  • Plate 2 x 4 Reddish Brown Part 3020 Element 4211186 ×8
  • Plate 2 x 6 Reddish Brown Part 3795 Element 4211247 ×3
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 2 spares in the box ×14
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×4
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×4
  • Plate 2 x 12 White Part 2445 Element 6552091 or 244501 ×1
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×2
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×2
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×2
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×5
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×1
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×1

Plates Special 72 pieces

  • Plate Special 1 x 2 with Clip Horizontal on End Black Part 63868 Element 6336989 or 4535739 ×1
  • Plate Special 1 x 2, Top Clip [Split] Black Part 92280 Element 4598528 ×5
  • Plate Special 1 x 4 with Towball Black Part 3184 Element 4516020 or 4189102 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Black Part 99206 Element 6052126 ×4
  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×8
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×2
  • Plate Special 1 x 2 with Clip Horizontal on End Blue Part 63868 Element 6354661 or 4568990 ×4
  • Plate Special 1 x 2 [Side Handle Closed Ends] Green Part 48336 Element 4521931 ×1
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Green Part 60470b Element 6347288 or 4556159 ×1
  • Plate Special 1 x 2 5.9mm Centre Side Towball Socket Light Bluish Gray Part 14704 Element 6414561 or 6338165 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×6
  • Plate Special 2 x 2 with Pin on Bottom Light Bluish Gray Part 2476a Element 6276848 or 4237084 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Medium Blue Part 15573 Element 6092601 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Red Part 15573 Element 6092565 ×5
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Reddish Brown Part 60478 Element 6102975 ×5
  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×6
  • Plate Special 1 x 1 with Tooth White Part 49668 Element 6601935 or 4224792 ×4
  • Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs White Part 75937 Element 6009016 ×1
  • Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 1 Support Wall on Bottom White Part 87609 Element 4560929 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Yellow Part 61252 Element 6347294 or 4540040 ×8
  • Plate Special 1 x 2 [Side Handle Closed Ends] Yellow Part 48336 Element 4501232 ×2

Bricks Sloped 70 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 1 spare in the box ×4
  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Dark Bluish Gray Part 15672 Element 6069164 or 4621917 ×8
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Green Part 54200 Element 6618111 or 4504375 1 spare in the box ×11
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Purple Part 54200 Element 4567509 or 4255409 1 spare in the box ×1
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Green Part 54200 Element 4546705 or 4503118 1 spare in the box ×11
  • Brick Sloped 30° 1 x 2 x 2/3 Green Part 85984 Element 6000071 ×5
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Light Bluish Gray Part 54200 Element 4521921 or 4244372 1 spare in the box ×4
  • Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×3
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Medium Blue Part 54200 Element 4565363 1 spare in the box ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Red Part 54200 Element 5074621 or 4504379 1 spare in the box ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Reddish Brown Part 54200 Element 4504376 or 4260486 1 spare in the box ×13
  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] White Part 15672 Element 6552150 or 6550153 ×2
  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed White Part 4871 Element 4173943 or 487101 ×2

Plates Wedged 48 pieces

  • Wedge Plate 4 x 2 Left Dark Blue Part 41770 Element 4529954 or 4247065 ×1
  • Wedge Plate 4 x 2 Right Dark Blue Part 41769 Element 4502091 or 4247066 ×1
  • Wedge Plate 8 x 3, 22° Left Dark Blue Part 50305 Element 6249596 or 4651377 ×1
  • Wedge Plate 8 x 3, 22° Right Dark Blue Part 50304 Element 6115221 or 4651373 ×1
  • Wedge Plate 3 x 4 with Stud Notches [Reinforced Underside] Dark Green Part 90194 Element 6170525 or 4649051 ×1
  • Wedge Plate 2 x 4 Green Part 51739 Element 6100220 ×1
  • Wedge Plate 3 x 3 Cut Corner Green Part 2450 Element 6529282 or 6114672 ×12
  • Wedge Plate 3 x 6 Cut Corners Green Part 2419 Element 241928 ×1
  • Wedge Plate 2 x 4 Light Bluish Gray Part 51739 Element 4507056 or 4252368 ×4
  • Wedge Plate 3 x 2 Left Light Bluish Gray Part 43723 Element 4211794 ×1
  • Wedge Plate 3 x 2 Right Light Bluish Gray Part 43722 Element 4211791 ×1
  • Wedge Plate 4 x 2 Left Light Bluish Gray Part 41770 Element 4211735 ×1
  • Wedge Plate 4 x 2 Right Light Bluish Gray Part 41769 Element 4211732 ×1
  • Wedge Plate 4 x 2 Left Medium Blue Part 41770 Element 6590055 or 6172410 ×2
  • Wedge Plate 4 x 2 Right Medium Blue Part 41769 Element 6590054 or 6172408 ×2
  • Wedge Plate 3 x 2 Left Red Part 43723 Element 4372321 or 4180533 ×1
  • Wedge Plate 3 x 2 Right Red Part 43722 Element 4372221 or 4180504 ×1
  • Wedge Plate 4 x 2 Left Reddish Brown Part 41770 Element 4205470 ×1
  • Wedge Plate 4 x 2 Right Reddish Brown Part 41769 Element 4205469 ×1
  • Wedge Plate 3 x 2 Left White Part 43723 Element 6552121 or 4179875 ×1
  • Wedge Plate 3 x 2 Right White Part 43722 Element 6552120 or 4179874 ×1
  • Wedge Plate 4 x 2 Left White Part 41770 Element 6552119 or 4161326 ×1
  • Wedge Plate 4 x 2 Right White Part 41769 Element 6552118 or 4160857 ×1
  • Wedge Plate 4 x 4 with 2 x 2 Cutout White Part 43719 Element 6275403 or 4561038 ×1
  • Wedge Plate 3 x 2 Left Yellow Part 43723 Element 4179095 ×8

Tiles 46 pieces

  • Tile 2 x 4 with White 'Colibri thalassinus' Print Black Part 87079pr0075 Element 6115331 ×1
  • Tile 2 x 4 with White 'Cyanocitta cristata' Print Black Part 87079pr0074 Element 6115328 ×1
  • Tile 2 x 4 with White 'Erithacus rubecula' Print Black Part 87079pr0073 Element 6115326 ×1
  • Tile 2 x 2 with Groove Dark Bluish Gray Part 3068b Element 4211055 ×3
  • Tile 1 x 2 with Groove Dark Purple Part 3069b Element 4613192 ×2
  • Tile 1 x 3 Dark Tan Part 63864 Element 6015452 ×8
  • Tile 1 x 6 with Groove Dark Tan Part 6636 Element 4507047 or 4251129 ×16
  • Tile 1 x 2 with Groove Green Part 3069b Element 306928 ×4
  • Tile 1 x 1 with Groove Medium Blue Part 3070b Element 4527526 or 4235958 1 spare in the box ×1
  • Tile 1 x 2 with Groove Medium Blue Part 3069b Element 4168345 ×1
  • Tile 1 x 3 Orange Part 63864 Element 4620693 ×8

Hinges, Arms and Turntables 20 pieces

  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×3
  • Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×4
  • Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Black Part 30553 Element 4143372 ×4
  • Hinge Cylinder 1 x 3 Locking with 1 Finger and 2 Fingers On Ends, with Hole, 9 Teeth Black Part 30554b Element 4507820 or 4143246 ×4
  • Hinge Plate 1 x 2 Locking with 1 Finger On Top Light Bluish Gray Part 30383 Element 6265694 or 4219913 ×4
  • Hinge Brick 1 x 2 Base White Part 3937 Element 6619287 or 393701 ×1

Bricks Special 13 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Black Part 87087 Element 4558954 ×1
  • Brick Special 1 x 2 with Studs on 2 Sides Black Part 52107 Element 4253815 ×1
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×3
  • Brick Special 1 x 1 with Stud on 1 Side Red Part 87087 Element 4558886 ×2
  • Brick Special 1 x 1 with Headlight Reddish Brown Part 4070 Element 4225469 ×3
  • Brick Special 1 x 2 with 2 Studs on 1 Side Tan Part 11211 Element 6024495 ×1
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×2

Bars, Ladders and Fences 12 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 1 spare in the box ×6
  • Bar 4L (Lightsaber Blade / Wand) Black Part 30374 Element 6116604 or 4140303 ×1
  • Bar 1 x 12 with 1 x 2 Plate End with Hollow Studs and 1 x 1 Round Plate End Trans-Clear Part 99784 Element 6010687 ×1
  • Lever Small Base with Black Lever Yellow Part 298c02 Element 74156 1 spare in the box ×4

Technic Axles 6 pieces

  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×1
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×2

Technic Connectors 6 pieces

  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×2
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Reddish Brown Part 32016 Element 6261388 or 4610666 ×2

Technic Pins 6 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×3
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×1

Bricks 5 pieces

  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×2
  • Brick 1 x 1 Red Part 3005 Element 300521 ×2
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×1

Bricks Curved 5 pieces

  • Brick Curved 3 x 1 No Studs Black Part 50950 Element 4251161 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Green Part 11477 Element 6047426 ×1
  • Brick Curved 3 x 1 No Studs Medium Blue Part 50950 Element 4288497 ×2
  • Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Medium Blue Part 11153 Element 6045942 ×1

Plates Round Curved and Dishes 5 pieces

  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 3 spares in the box ×5

Bricks Round and Cones 4 pieces

  • Cone 1 x 1 [Top Groove] Black Part 59900 Element 4529236 Also in Dark Bluish Gray ×1
  • Cone 1 x 1 [Top Groove] Dark Bluish Gray Part 59900 Element 4529240 Also in Black ×1
  • Brick Round 2 x 2 with Axle Hole Light Bluish Gray Part 3941 Element 4211526 ×1
  • Brick Round 2 x 2 with Axle Hole Orange Part 3941 Element 4141089 ×1

Animal / Creature Body Parts 2 pieces

  • Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section Dark Green Part 40379 Element 6512537 or 6114669 ×1
  • Animal Body Part / Plant, Tail / Neck / Branch / Trunk, Middle Section with Pin, Round Pin Hole Dark Green Part 40378 Element 6114670 or 4260497 ×1

Bricks Wedged 2 pieces

  • Brick Wedged, Sloped 4 x 4 Triple, Stud Notches Dark Green Part 48933 Element 6101853 ×2

Pneumatics 2 pieces

  • Pneumatic T-Piece (T Bar) [New Style] Light Bluish Gray Part 4697b Element 4211508 1 spare in the box ×2

Technic Bushes 2 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×2

Technic Bricks 1 piece

  • Technic Brick 1 x 4 [3 Pin Holes] Reddish Brown Part 3701 Element 4267994 ×1

Technic Special 1 piece

  • Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole Reddish Brown Part 32124 Element 6280388 or 6035580 ×1

Tools 1 piece

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