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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.

Magma Mech

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8189 Magma Mech

176 pieces in 78 part and color combinations, plus 2 minifigures.

The piece count includes the 8 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

Technic Pins 24 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×7
  • Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction Black Part 47455 Element 4272426 or 4213374 ×4
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×2
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×2
  • Technic Pin 1/2 with 2L Bar Extension Light Bluish Gray Part 61184 Element 6347715 or 4520320 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×6
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×1

Bricks Sloped 21 pieces

  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Black Part 4871 Element 4188534 or 487126 ×1
  • Brick Sloped Inverted 45° 4 x 4 Double with 4 x 2 Recessed Black Part 4854 Element 4643321 or 4603490 ×1
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Dark Bluish Gray Part 3747b Element 4211064 ×1
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Lime Part 61409 Element 6370977 or 4540385 ×6
  • Brick Sloped 45° 2 x 2 Lime Part 3039 Element 4650630 or 4212554 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Orange Part 54200 Element 6245265 or 4244369 1 spare in the box ×8

Plates 15 pieces

  • Plate 2 x 3 Black Part 3021 Element 302126 ×5
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×3
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×1
  • Plate 1 x 2 Lime Part 3023 Element 4164037 or 4122439 ×2
  • Plate 1 x 4 Lime Part 3710 Element 4187743 or 4122441 ×2
  • Plate 2 x 2 Lime Part 3022 Element 4613977 or 4537937 ×2

Technic Special 12 pieces

  • Technic Brick Special 2 x 2 with Pin Hole, with 2 Rotation Joint Sockets Black Part 48172 Element 6296186 or 4275826 ×2
  • Technic Brick Special 2 x 2 with Ball Socket Reinforced and Axle Hole Dark Bluish Gray Part 62712 Element 4524353 or 4497254 ×2
  • Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top] Dark Bluish Gray Part 48170 Element 6279898 or 4227395 ×4
  • Technic Brick Special 2 x 2 with Solid Ball and Axle Hole Dark Bluish Gray Part 57909a ×2
  • Technic Link Tread Wide with Two Pin Holes, Reinforced Metallic Silver Part 88323 ×2

Technic Axles 11 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×4
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×5

Technic Connectors 9 pieces

  • Technic Axle and Pin Connector Angled #1 Blue Part 32013 Element 6332570 or 4107797 ×2
  • Technic Axle and Pin Connector Angled #2 - 180° Blue Part 32034 Element 6484676 or 4107798 ×2
  • Technic Axle and Pin Connector Angled #4 - 135° Dark Bluish Gray Part 32192 Element 6262899 or 4210688 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×1
  • Technic Axle and Pin Connector Perpendicular Double Split Light Bluish Gray Part 41678 Element 4211889 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Yellow Part 59443 Element 4519010 ×1

Bricks 8 pieces

  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×1
  • Brick 1 x 2 Lime Part 3004 Element 4613965 or 4164022 ×1
  • Brick 2 x 4 Lime Part 3001 Element 4165967 or 4122453 ×6

Plates Special 8 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Blue Part 3794b Element 379423 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Bluish Gray Part 87580 Element 6126083 or 4565322 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End Light Bluish Gray Part 63868 Element 6319336 or 4535738 ×2
  • Plate Special 1 x 2 with Clips Horizontal [Thick U-Clips] Light Bluish Gray Part 60470a Element 4537900 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Lime Part 4081b Element 6281999 or 4632576 ×2

Technic Bricks 8 pieces

  • Technic Brick 1 x 1 with Pin Hole Blue Part 6541 Element 4119014 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Light Bluish Gray Part 32064b ×4

Tiles 8 pieces

  • Tile 2 x 4 with Groove Light Bluish Gray Part 87079 Element 4560183 ×2
  • Tile 1 x 3 Lime Part 63864 Element 6185307 or 4565993 ×6

Bricks Round and Cones 7 pieces

  • Brick Round 2 x 2 with Axle Hole Blue Part 3941 Element 614373 or 614323 ×1
  • Brick Round 4 x 4 Centre Hole Blue Part 87081 Element 6209671 or 4567527 ×1
  • Cone 1 x 1 [Top Groove] Blue Part 59900 Element 4529235 ×3
  • Cone Jagged, Drill Tip Blue Part 64713 Element 6012894 or 4567513 ×1
  • Dome Hemisphere 4 x 4 Trans-Dark Blue Part 86500 Element 4567520 ×1

Plates Round Curved and Dishes 7 pieces

  • Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 1 spare in the box ×3
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×4

Bricks Special 6 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Light Bluish Gray Part 87087 Element 4558953 ×2
  • Brick Special 1 x 2 with Grille Light Bluish Gray Part 2877 Element 4211383 ×4

Technic Beams 5 pieces

  • Technic Beam 1 x 9 Thick Blue Part 40490 Element 6115617 or 4239749 ×2
  • Technic Beam 3 x 5 L-Shape Thick Blue Part 32526 Element 4158923 ×1
  • Technic Beam 1 x 7 Thick Light Bluish Gray Part 32524 Element 4495930 or 4211665 ×1
  • Technic Beam 1 x 5 Thick Lime Part 32316 Element 4661486 or 4571220 ×1

Technic Beams Special 4 pieces

  • Technic Pin Connector Double with Bar [2 Holes] Black Part 85940 Element 6173124 or 4562148 ×4

Bricks Wedged 3 pieces

  • Brick Wedged, Sloped 4 x 4 Triple, Stud Notches Blue Part 48933 Element 6030195 or 4571219 ×1
  • Brick Wedged, Sloped 6 x 4 Cutout, Stud Notches Lime Part 6153b Element 6129986 or 4565369 ×2

Transportation - Land 3 pieces

  • Handlebars Black Part 30031 Element 3003126 ×1
  • Wheel Arch, Mudguard 4 x 2 1/2 x 2 with 2 x 2 Plate Lime Part 50745 Element 4571221 or 4525857 ×2

Bars, Ladders and Fences 2 pieces

  • Bar 4L (Lightsaber Blade / Wand) Black Part 30374 Element 6116604 or 4140303 ×1
  • Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye Trans-Orange Part 58176 Element 6507868 or 6171764 ×1

Large Buildable Figures 2 pieces

  • Large Figure Weapon Blade (Toa Tahu) Pearl Light Gray Part 61795 Element 4525705 ×2

Minifig Upper Body 2 pieces

  • Arm Mechanical with Clip [Thin Support] Black Part 53989 Element 4623154 or 4294996 ×2

Panels 2 pieces

  • Panel 1 x 2 x 1 [Square Corners] Light Bluish Gray Part 4865a Element 4211515 ×2

Transportation - Sea and Air 2 pieces

  • Engine Smooth Large [2 x 2 Thin Top Plate] Light Bluish Gray Part 4868b Element 4263610 ×2

Energy Effects 1 piece

  • Wave / Flame Rounded with Base Pegs Trans-Light Blue Part 6126a Element 4155537 or 612642 ×1

Rock 1 piece

  • Rock 1 x 1 Crystal 5 Point Trans-Orange Part 30385 Element 6097583 or 4541536 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8189-1 [No Color/Any Color] Part 89289 Element 4571134 ×1

Technic Gears 1 piece

  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×1

Tiles Special 1 piece

  • Tile Special 1 x 1 with Clip and Straight Tips Dark Bluish Gray Part 2555 Element 6031420 or 4211069 ×1

Tubes and Hoses 1 piece

  • Flexible Ribbed Hose 8mm Ends 19L Pearl Light Gray Part 57539 Element 4561465 or 4506460 ×1

Wheels and Tyres 1 piece

  • Wheel 31 x 15 Technic, 7 Pin Holes Blue Part 60208 Element 4567542 ×1

Minifigures 2 figures

  • Firax, Trans Orange Minifigure, checked as a whole figure ×1
  • Power Miner, Engineer with Armor and Helmet 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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