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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.

Overhead Gantry and Lighting Maintenance Wagon

Checking

7821 Overhead Gantry and Lighting Maintenance Wagon

82 pieces in 38 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

Plates 27 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×3
  • Plate 1 x 6 Black Part 3666 Element 366626 ×3
  • Plate 2 x 10 Black Part 3832 Element 383226 ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 2 x 6 Black Part 3795 Element 379526 ×3
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×1
  • Plate 6 x 16 Black Part 3027 Element 302726 ×1
  • Plate 2 x 6 Dark Gray Part 3795 Element 379527 ×1
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×3
  • Plate 2 x 3 Light Gray Part 3021 Element 302102 ×1
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1
  • Plate 4 x 8 Yellow Part 3035 Element 303524 ×1

Bricks Sloped 12 pieces

  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×8
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×4

Plates Special 8 pieces

  • Plate Special 1 x 1 with Clip Vertical [Thin Open O Clip] Black Part 4085a ×2
  • Plate Special 1 x 2 with Ladder Black Part 4175 Element 6285241 or 6179557 ×4
  • Plate Special 1 x 2 with Ladder Light Gray Part 4175 Element 4100526 or 417502 ×2

Bars, Ladders and Fences 7 pieces

  • Bar 1 x 4 x 2 with Studs Yellow Part 4083 Element 408324 ×2
  • Fence Lattice 1 x 4 x 1 Yellow Part 3633 Element 4190509 or 363324 ×5

Supports, Girders and Cranes 6 pieces

  • Support 2 x 4 x 5 Stanchion Inclined [3mm wide posts] Black Part 4476a ×4
  • Bracket 2 x 3 - 1 x 3 (Train Signal Stand) Light Gray Part 4169 Element 416902 ×1
  • Support 1 x 16 Lattice (Train Signal Mast) Light Gray Part 4168 Element 416802 ×1

Magnets and Holders 4 pieces

  • Magnet Cylindrical Black Part 73092 Element 73092 ×2
  • Train Coupling Black Part 4023 ×2

Minifig Shields, Weapons, & Tools 4 pieces

  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1
  • Tool Pickaxe Dark Gray Part 3841 Element 384127 ×1
  • Weapon Gun / Torch (Space) [with Grooves] Light Gray Part 3959 Element 4254948 or 395952 ×2

Bricks 3 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×3

Technic Bushes 2 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×2

Transportation - Land 2 pieces

  • Train Buffer Beam Black Part 4022 Element 4109853 or 402276 ×2

Wheels and Tyres 2 pieces

  • Wheels Train Spoked Small (23mm D.) and Black Brick, Modified 2 x 4 [Black] Black Part 4180c01 ×2

Hinges, Arms and Turntables 1 piece

  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×1

Minifig Accessories 1 piece

  • Equipment Shovel [Rounded Handle End] Dark Gray Part 3837 Element 383727 ×1

Plates Round Curved and Dishes 1 piece

  • Dish 4 x 4 Inverted [Radar] Light Gray Part 3960 Element 4143013 or 396002 ×1

Technic Axles 1 piece

  • Technic Axle 4 Black Part 3705 Element 370526 ×1

Technic Connectors 1 piece

  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×1

Minifigures 2 figures

  • Man, Blue Shirt, Blue Legs, Red Hard Hat Minifigure, checked as a whole figure ×2

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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