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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.

Mutation Chamber Unleashed

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79119 Mutation Chamber Unleashed

177 pieces in 70 part and color combinations, plus 3 minifigures.

LEGO counts 196 pieces. This inventory comes from a separate parts catalog and lists 195, including the 18 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.

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Piece checklist

Plates Round Curved and Dishes 30 pieces

  • Plate Round Corner 4 x 4 Dark Bluish Gray Part 30565 Element 4222042 ×4
  • Plate Round 6 x 6 with Hole Light Bluish Gray Part 11213 Element 6015349 ×1
  • Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 ×9
  • Dish 2 x 2 Inverted [Radar] Trans-Dark Pink Part 4740 Element 6580376 or 6245302 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Pink Part 6141 Element 6514060 or 6240230 ×4
  • Dish 2 x 2 Inverted [Radar] Trans-Light Blue Part 4740 Element 6580378 or 6245307 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 ×4
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×2

Tiles 26 pieces

  • Tile 1 x 3 Blue Part 63864 Element 4587840 ×8
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×1
  • Tile 1 x 2 with Cell Phone with '81%' and Minifig on Screen Print Light Bluish Gray Part 3069bpr0137 Element 6076806 ×1
  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×2
  • Tile 1 x 2 with Groove Magenta Part 3069b Element 4611415 ×7
  • Tile 2 x 4 with Groove Magenta Part 87079 Element 4651898 ×1
  • Tile 1 x 4 with Groove Trans-Neon Green Part 2431 Element 6252052 or 6030742 ×4
  • Tile 1 x 4 with Black Diagonal Stripes Print Yellow Part 2431pr0017 Element 4119091 ×2

Plates 25 pieces

  • Plate 1 x 2 Dark Blue Part 3023 Element 6554191 or 4528981 ×1
  • Plate 1 x 4 Dark Blue Part 3710 Element 4502089 or 4177739 ×8
  • Plate 2 x 3 Dark Blue Part 3021 Element 6554192 or 4530028 ×1
  • Plate 8 x 16 Dark Bluish Gray Part 92438 Element 4654613 ×1
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×2
  • Plate 1 x 2 Lime Part 3023 Element 4164037 or 4122439 ×3
  • Plate 1 x 4 Lime Part 3710 Element 4187743 or 4122441 ×2
  • Plate 2 x 4 Lime Part 3020 Element 4537936 or 4534667 ×5
  • Plate 2 x 2 Corner Yellow Part 2420 Element 242074 or 242024 ×2

Bricks 22 pieces

  • Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 ×3
  • Brick 1 x 1 x 5 with Blocked Open or Hollow Stud Dark Bluish Gray Part 2453a ×4
  • Brick 1 x 3 Dark Bluish Gray Part 3622 Element 4211104 ×4
  • Brick 2 x 2 Corner Dark Bluish Gray Part 2357 Element 4211109 ×2
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×3
  • Brick 1 x 4 Light Bluish Gray Part 3010 Element 4211394 ×2
  • Brick 1 x 2 x 5 without Side Supports Trans-Neon Green Part 46212 Element 6066338 ×4

Bricks Sloped 15 pieces

  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [Original Version] Black Part 92946 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×4
  • Brick Sloped 18° 4 x 2 Light Bluish Gray Part 30363 Element 4509915 or 4211618 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Magenta Part 3040b Element 4625626 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Yellow Part 54200 Element 4504381 or 4283095 ×3

Plates Special 11 pieces

  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Black Part 60897 Element 6330189 or 4617547 ×2
  • Technic Plate 2 x 8 [7 Holes] Dark Bluish Gray Part 3738 Element 4260707 ×2
  • Wedge Plate 8 x 6 x 2/3 with Grille Dark Bluish Gray Part 30036 Element 4527144 ×2
  • Technic Plate 2 x 6 [5 Holes] Light Bluish Gray Part 32001 Element 4211542 ×3
  • Plate Special 1 x 2 Side Handle [Free Ends] Yellow Part 2540 Element 4140587 or 254024 ×2

Bricks Round and Cones 10 pieces

  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder Flat Silver Part 30367b ×2
  • Brick Round 2 x 2 [Grill] Light Bluish Gray Part 92947 Element 4650645 or 4610816 ×3
  • Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Light Bluish Gray Part 48092 Element 6452524 or 4215472 ×2
  • Brick Round 1 x 1 Open Stud Trans-Neon Green Part 3062b Element 6514237 or 6238675 ×2
  • Brick Round 2 x 2 with Axle Hole Trans-Neon Green Part 3941 Element 6273157 or 611649 ×1

Hinges, Arms and Turntables 5 pieces

  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×2
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×2
  • Turntable 4 x 4 Square Base, Locking White Part 61485 Element 6619301 or 4611927 ×1

Panels 5 pieces

  • Panel 1 x 6 x 5 Light Bluish Gray Part 59349 Element 4527174 ×1
  • Panel 3 x 3 x 6 Corner Wall without Bottom Indentations Light Bluish Gray Part 87421 Element 6387879 or 4563698 ×2
  • Panel 4 x 4 x 6 Quarter Cylinder Trans-Neon Green Part 30562 Element 6391146 or 6066335 ×2

Plates Wedged 5 pieces

  • Wedge Plate 2 x 4 Light Bluish Gray Part 51739 Element 4507056 or 4252368 ×1
  • Wedge Plate 3 x 6 Cut Corners Light Bluish Gray Part 2419 Element 4211352 ×2
  • Wedge Plate 4 x 4 Cut Corner Light Bluish Gray Part 30503 Element 4160560 ×2

Tiles Round and Curved 5 pieces

  • Tile Round 1 x 1 Flat Silver Part 98138 Element 6238890 or 4655241 ×2
  • Tile Round 2 x 2 with Bottom Stud Holder Light Bluish Gray Part 14769 Element 6052200 ×3

Tiles Special 4 pieces

  • Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×2
  • Tile Special 2 x 3 with 2 Clips [Thick Open O Clips] Trans-Light Blue Part 30350b Element 4603191 ×2

Bricks Curved 3 pieces

  • Brick Arch 1 x 3 x 2 Black Part 88292 Element 4581280 ×2
  • Brick Arch 1 x 6 Raised Arch Dark Bluish Gray Part 92950 Element 4620760 ×1

Bricks Special 2 pieces

  • Brick Special 1 x 2 with Handle Dark Bluish Gray Part 30236 Element 4211128 ×2

Energy Effects 2 pieces

  • Wave / Lightning Angular, Double with Marbled Trans-Purple Pattern Trans-Light Blue Part 59233pat0001 Element 6514339 or 6450487 ×2

Minifig Shields, Weapons, & Tools 2 pieces

  • Weapon Sai Flat Silver Part 98139 Element 6270136 or 4646867 ×2

Supports, Girders and Cranes 2 pieces

  • Support 2 x 2 x 10 Girder Triangular Vertical - Type 4 - 3 Posts, 3 Sections Black Part 95347 Element 6470981 or 4667463 ×2

Animals / Creatures 1 piece

  • Insect, Spider Black Part 30238 Element 4113209 ×1

Bars, Ladders and Fences 1 piece

  • Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Black Part 6020 Element 602026 ×1

Technic Axles 1 piece

  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×1

Minifigures 3 figures

  • Raphael with Dark Gray Outfit Minifigure, checked as a whole figure ×1
  • Victor Minifigure, checked as a whole figure ×1
  • Spider Bytez 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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