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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.

Sky Guardian

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8103 Sky Guardian

140 pieces in 67 part and color combinations, plus 1 minifigure.

The official piece count includes the 4 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

Black 37 pieces

  • Axle Hose, Soft 11L Black Part 32199 Element 4234438 or 4121646 ×1
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×2
  • Brick Sloped 45° 2 x 3 Black Part 3038 Element 303826 ×2
  • Hinge Cylinder 1 x 3 Locking with 1 Finger and Technic Friction Pin with Round Hole Black Part 41532 Element 4159335 ×4
  • Plate 2 x 4 Black Part 3020 Element 302026 ×1
  • Plate 2 x 6 Black Part 3795 Element 379526 ×4
  • Support 1 x 1 x 5 1/3 Spiral Staircase Axle Black Part 40244 Element 4155558 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×1
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×3
  • Technic Brick Special 2 x 2 with Pin Hole, with 2 Rotation Joint Sockets Black Part 48172 Element 6296186 or 4275826 ×1
  • Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×1
  • Technic Pin Connector Plate with One Hole (Single on Bottom) Black Part 32529 Element 4144023 ×2
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×3
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×4
  • Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction Black Part 47455 Element 4272426 or 4213374 ×6

White 26 pieces

  • Brick Curved 2 x 2 with Lip, No Studs White Part 30602 Element 4195869 ×2
  • Brick Curved 6 x 2 White Part 44126 Element 6619299 or 4179870 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin White Part 3040b Element 6552115 or 4121932 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin White Part 3747b Element 4500469 ×1
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×4
  • Brick Wedged, Sloped 6 x 4 Cutout, Stud Notches White Part 6153b Element 6320168 or 6110031 ×2
  • Engine Smooth Large [2 x 2 Thin Top Plate] White Part 4868b Element 4654622 or 4579345 ×2
  • Large Figure Skeletal, Torso with Beam, 2 Ball Joints, and 7 Tooth Half Gear White Part 47306 Element 4278499 or 4217827 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] White Part 6019 Element 601951 or 601901 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] White Part 48336 Element 6552125 or 4222017 ×1
  • Technic Beam 1 x 7 Thick White Part 32524 Element 6564912 or 6318056 ×1
  • Technic Brick 1 x 4 [3 Pin Holes] White Part 3701 Element 6601913 or 370101 ×1
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×1
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1

Dark Bluish Gray 22 pieces

  • Brick 2 x 4 Dark Bluish Gray Part 3001 Element 4211085 ×1
  • Brick Round 1 x 1 with Fins, Open Stud Dark Bluish Gray Part 4588 Element 6331222 or 6321195 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] Dark Bluish Gray Part 2540 Element 4210660 ×4
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Dark Bluish Gray Part 32174 Element 4217829 ×1
  • Technic Axle and Pin Connector Angled #1 Dark Bluish Gray Part 32013 Element 32013199 or 6296856 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Dark Bluish Gray Part 32064b ×1
  • Technic Brick Special 2 x 2 with Ball Socket Reinforced and Axle Hole Dark Bluish Gray Part 62712 Element 4524353 or 4497254 ×3
  • Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top] Dark Bluish Gray Part 48170 Element 6279898 or 4227395 ×2
  • Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket Dark Bluish Gray Part 47452 Element 6021206 or 4636472 ×2
  • Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Vertical Side], Rotation Joint Socket Dark Bluish Gray Part 47432 Element 4235573 ×2

Light Bluish Gray 12 pieces

  • Engine Centre - Smooth Large Light Bluish Gray Part 4869 Element 4211825 ×2
  • Hinge Brick 2 x 2 Locking with 2 Fingers Vertical and Axle Hole, 9 Teeth Light Bluish Gray Part 40902 Element 6093870 or 4215971 ×2
  • Hinge Plate 1 x 2 Locking with 1 Finger On Top Light Bluish Gray Part 30383 Element 6265694 or 4219913 ×2
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×4

Dark Blue 11 pieces

  • Brick Wedged, Curved 4 x 4 No Top Studs Dark Blue Part 47753 Element 6289824 or 6115178 ×1
  • Brick Wedged, Sloped 6 x 4 Cutout, Stud Notches Dark Blue Part 6153b Element 6115933 or 6003092 ×2
  • Hinge Plate 1 x 12 Locking with Angled Side Extensions and Tapered Ends, 7 Teeth Dark Blue Part 57906 Element 6082417 or 4500106 ×4
  • Tile 2 x 2 with Groove Dark Blue Part 3068b Element 4205004 ×4

Yellow 11 pieces

  • Cone 1 x 1 [No Top Groove] Yellow Part 4589 Element 458924 ×4
  • Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders] Yellow Part 3475b Element 4500611 or 4215616 ×4
  • Large Figure Weapon Blade, with Trans Clear Center (Sky Guardian) Yellow Part 57912c01 Element 4501532 ×1
  • Tile 1 x 2 with Engraved Code for Exo-Force Yellow Part 3069bpr0073 Element 4513198 or 4507020 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Yellow Part 2412b Element 241224 ×1

Pearl Light Gray 6 pieces

  • Arm Mechanical with Clip [Thin Support] Pearl Light Gray Part 53989 Element 4494600 or 4288114 ×4
  • Hose, Ribbed 7mm D. 6L / 4.8cm Pearl Light Gray Part 78c06 Element 4495202 or 4143468 ×2

Blue 4 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×4

Bright Green 2 pieces

  • Projectile, Large Figure Weapon, Zamor Sphere / Ball with Marbled Trans-Bright Green Pattern Bright Green Part 54821pat0002 Element 4296080 ×2

Trans-Orange 2 pieces

  • Cone 1 x 1 [No Top Groove] Trans-Orange Part 4589 Element 4221195 ×2

Trans-Yellow 2 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Yellow Part 54200 Element 6245272 or 4260942 ×2

Pearl Dark Gray 1 piece

  • Large Figure Weapon, Zamor Sphere Launcher Pearl Dark Gray Part 54271 Element 4288099 ×1

Red 1 piece

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1

Tan 1 piece

  • Bracket 3 x 2 - 2 x 2 [aka Space Seat] Tan Part 4598 Element 4262527 or 4125218 ×1

Trans-Brown 1 piece

  • Panel 3 x 2 x 6 Trans-Brown Part 2466 Element 4501020 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 8103-1 [No Color/Any Color] Part 58391 Element 4499562 ×1

Minifigures 1 figure

  • Hikaru in Gold Armor 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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