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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.

Vector Detector

Checking

6877 Vector Detector

56 pieces in 37 part and color combinations, plus 1 minifigure.

The official piece count includes the 6 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

Plates 14 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×1
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×5
  • Plate 2 x 3 Red Part 3021 Element 302121 ×1
  • Plate 2 x 6 Red Part 3795 Element 379521 ×1

Plates Special 7 pieces

  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Black Part 4085c Element 408526 ×2
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Red Part 4081b Element 6281994 or 4632572 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Red Part 4085c Element 408521 ×2

Plates Wedged 5 pieces

  • Wedge Plate 8 x 4 Wing Right without Stud Notch Black Part 3934a ×2
  • Wedge, Plate 8 x 4 Wing Left without Underside Stud Notch Black Part 3933a ×2
  • Wedge, Plate 8 x 8 with 4 x 4 Cutout Red Part 4475 ×1

Bricks Sloped 4 pieces

  • Brick Sloped 33° 3 x 2 Red Part 3298 Element 329821 ×1
  • Brick Sloped 33° 3 x 2 with MTron Logo Print Red Part 3298pr0026 ×1
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Red Part 3747a Element 374721 ×2

Bricks Special 4 pieces

  • Bracket 8 x 2 x 1 1/3 Black Part 4732 Element 473226 ×1
  • Brick Special 1 x 2 x 2/3 with Studs on Sides Light Gray Part 4595 Element 459502 ×2
  • Brick Special 1 x 2 with Pin Red Part 2458 Element 245821 ×1

Magnets and Holders 4 pieces

  • Magnet Cylindrical Black Part 73092 Element 73092 ×2
  • Magnet Holder Tile 2 x 2 - Short Arms Black Part 2609a Element 4111912 or 260926 ×1
  • Magnet Holder 2 x 3 Red Part 2607 Element 260721 ×1

Plates Round Curved and Dishes 4 pieces

  • Dish 2 x 2 Inverted [Radar] Trans-Neon Green Part 4740 Element 6245297 or 4112517 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 ×2

Bars, Ladders and Fences 2 pieces

  • Antenna 8H Whip Trans-Neon Green Part 2569 Element 6265159 or 6164380 ×2

Bricks Round and Cones 2 pieces

  • Cone 1 x 1 [No Top Groove] Trans-Neon Green Part 4589 Element 618849 or 458949 ×2

Containers 2 pieces

  • Box 2 x 2 x 2 Door with Slot and Black/Red MTron Print Light Gray Part 4346pr0004 ×1
  • Box 2 x 2 x 2 [Solid Studs] Red Part 4345a ×1

Hinges, Arms and Turntables 2 pieces

  • Hinge Brick 1 x 2 Top Plate Thin Black Part 3938 Element 393826 ×1
  • Hinge Brick 1 x 2 Base Red Part 3937 Element 393721 ×1

Tiles 2 pieces

  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 ×1
  • Tile 1 x 2 with Red and Yellow Control Panel Print (Original) White Part 3069bpr0048 Element 4264367 or 81515 ×1

Transportation - Sea and Air 2 pieces

  • Tail 4 x 2 x 2 Black Part 3479 Element 347976 or 347926 ×2

Minifig Accessories 1 piece

  • Equipment Radio [Compact Handle] Black Part 3962a ×1

Panels 1 piece

  • Panel 3 x 2 x 6 Trans-Neon Green Part 2466 Element 4109867 or 246649 ×1

Minifigures 1 figure

  • M:Tron 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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