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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.

Heavy Loader

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7900 Heavy Loader

344 pieces in 109 part and color combinations, plus 1 minifigure.

LEGO counts 347 pieces. This inventory comes from a separate parts catalog and lists 348, including the 4 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Black 97 pieces

  • Arm Mechanical with 2 Clips [Battle Droid] Black Part 30377 Element 6330086 or 4223247 1 spare in the box ×2
  • Box 2 x 2 x 2 [Hollow Studs] Black Part 4345b Element 6138634 or 4143247 ×2
  • Bracket 1 x 2 - 1 x 4 [Square Corners] Black Part 2436 Element 4282746 or 243626 ×1
  • Brick 1 x 6 Black Part 3009 Element 300926 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Black Part 6091 Element 6383142 or 6184784 ×2
  • Panel 1 x 4 x 3 [Hollow Studs] Black Part 4215b Element 4105207 ×1
  • Plate 1 x 4 Black Part 3710 Element 371026 ×1
  • Plate 1 x 8 Black Part 3460 Element 346026 Also in Dark Bluish Gray ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 8 Black Part 3034 Element 303426 ×7
  • Plate 4 x 12 Black Part 3029 Element 302926 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×7
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×4
  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×1
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×8
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×32
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×1
  • Turntable 4 x 4 Top, Locking Black Part 30658 Element 4142915 ×1
  • Tyre 24 x 14 Shallow Tread (Tread Small Hub) Black Part 30648 Element 4524358 or 4153005 ×6
  • Tyre 30.4 x 14 Offset Tread Black Part 30391 Element 4140670 or 3039126 ×6

Yellow 80 pieces

  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×12
  • Brick 1 x 3 Yellow Part 3622 Element 362224 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×4
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×3
  • Brick 1 x 8 Yellow Part 3008 Element 300824 ×2
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×2
  • Brick 2 x 6 Yellow Part 2456 Element 4181143 or 245624 ×2
  • Brick Arch 2 x 14 x 2 1/3 Yellow Part 30296 Element 4262637 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Yellow Part 54200 Element 4504381 or 4283095 Also in Trans-Yellow ×4
  • Brick Sloped 45° 2 x 8 Yellow Part 4445 Element 4264364 or 4258384 ×1
  • Brick Sloped Inverted 45° 2 x 1 Yellow Part 3665 Element 366524 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×4
  • Brick Sloped Inverted 45° 4 x 4 Double with 4 x 2 Recessed Yellow Part 4854 Element 4258394 or 485424 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side Yellow Part 30414 Element 4164073 or 3041424 ×2
  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs Yellow Part 45677 Element 6492532 or 4193073 ×2
  • Lever Small Base with Black Lever Yellow Part 298c02 Element 74156 2 spares in the box ×3
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×1
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×1
  • Plate 4 x 4 Yellow Part 3031 Element 4243817 or 303124 ×1
  • Plate 4 x 8 Yellow Part 3035 Element 303524 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Yellow Part 4085c Element 408524 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Yellow Part 32271 Element 6276838 or 4544005 ×4
  • Technic Brick 1 x 10 [9 Pin Holes] Yellow Part 2730 Element 4251460 or 4225500 ×2
  • Technic Brick 1 x 6 [5 Pin Holes] Yellow Part 3894 Element 389424 ×4
  • Technic Brick 6 x 8 with 4 x 6 Opening Yellow Part 32532 Element 4162899 or 3253224 ×1
  • Technic Plate 2 x 8 [7 Holes] Yellow Part 3738 Element 4624216 or 373824 ×2
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×3
  • Tile 1 x 4 with Groove Yellow Part 2431 Element 243124 ×3
  • Tile 1 x 6 with Groove Yellow Part 6636 Element 6388488 or 663624 ×1
  • Tile 1 x 8 with Groove Yellow Part 4162 Element 6388482 or 4189400 ×2
  • Tile Special 1 x 2 with Handle Yellow Part 2432 Element 243224 ×2

Light Bluish Gray 53 pieces

  • Bar 4L (Lightsaber Blade / Wand) Light Bluish Gray Part 30374 Element 6116608 or 4211628 ×2
  • Box 2 x 2 x 2 Door with Slot Light Bluish Gray Part 4346 Element 4211492 ×2
  • Brick Special 2 x 4 with Pins Light Bluish Gray Part 6249 Element 6356158 or 4211676 ×3
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×1
  • Plate 1 x 6 Light Bluish Gray Part 3666 Element 4211438 ×1
  • Plate 4 x 6 Light Bluish Gray Part 3032 Element 4211404 ×3
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Light Bluish Gray Part 6019 Element 4211518 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Bluish Gray Part 3794a ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Light Bluish Gray Part 4623 Element 4211505 ×2
  • Support 31 x 13 Girder, Trapezoid Light Bluish Gray Part 55767 Element 4293986 ×4
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Light Bluish Gray Part 3701 Element 4211441 ×4
  • Technic Brick 4 x 4 with 2 x 2 Opening Light Bluish Gray Part 32324 Element 4211640 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 2 spares in the box ×6
  • Tile 1 x 2 with Red 82, Yellow and White Gauges Print Light Bluish Gray Part 3069bpr0101 Element 4227776 ×1
  • Tile Special 1 x 1 with Clip and Straight Tips Light Bluish Gray Part 2555 Element 4211369 or 2555194 ×2
  • Turntable 4 x 4 Locking Grooved Base Light Bluish Gray Part 30516 Element 4296249 ×1
  • Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Light Bluish Gray Part 55981 Element 6109684 or 4299119 ×12

Blue 30 pieces

  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Blue Part 3794a ×4
  • Seat / Chair 2 x 2 Blue Part 4079 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Blue Part 3829c01 Element 9566 ×1
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×12
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 2 spares in the box ×10
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×1

Dark Bluish Gray 30 pieces

  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×2
  • Brick Special 2 x 2 with Pin and Axle Hole Dark Bluish Gray Part 6232 Element 6408023 or 4211046 ×1
  • Equipment Binoculars Dark Bluish Gray Part 30162 Element 4587887 or 4211051 ×1
  • Plate 1 x 8 Dark Bluish Gray Part 3460 Element 4210998 Also in Black ×2
  • Plate 2 x 16 Dark Bluish Gray Part 4282 Element 4210796 ×2
  • Plate 4 x 8 Dark Bluish Gray Part 3035 Element 4211061 ×1
  • Plate Special 8 x 8 with Grille [Hole in Center] Dark Bluish Gray Part 4151b Element 6471953 or 4299022 ×2
  • Support 1 x 1 x 5 1/3 Spiral Staircase Axle Dark Bluish Gray Part 40244 Element 6228982 or 4210731 ×2
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Dark Bluish Gray Part 32348 Element 32348199 or 6278127 ×4
  • Technic Brick 1 x 14 [13 Pin Holes] Dark Bluish Gray Part 32018 Element 4211137 ×2
  • Tile 8 x 16 with Bottom Tubes on Edges Dark Bluish Gray Part 48288 Element 4287474 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×6
  • Tile Special 2 x 3 with 2 Clips [Angled Clips] Dark Bluish Gray Part 30350a ×1

Trans-Orange 22 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Orange Part 54200 Element 6245265 or 4244369 ×12
  • Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 2 spares in the box ×6
  • Tile 1 x 2 with Groove Trans-Orange Part 3069b Element 6514225 or 6251306 ×4

Trans-Yellow 14 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Yellow Part 54200 Element 6245272 or 4260942 Also in Yellow ×2
  • Plate 1 x 2 Trans-Yellow Part 3023 Element 6514002 or 6240211 ×8
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×4

Trans-Brown 4 pieces

  • Panel 1 x 2 x 2 [Hollow Studs] Trans-Brown Part 4864b Element 4189803 ×2
  • Windscreen 2 x 4 x 2 Trans-Brown Part 3823 Element 6253684 or 4167504 ×2

Trans-Clear 4 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 2 spares in the box ×4

Trans-Red 4 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 2 spares in the box ×4

White 3 pieces

  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×1
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×2

Red 2 pieces

  • Brick Round 1 x 1 Open Stud Red Part 3062b Element 306221 ×1
  • Tap 1 x 1 with Hole in Spout Red Part 4599a ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 7900-1 [No Color/Any Color] Part 56605 Element 4296218 ×1

Minifigures 1 figure

  • Construction Worker, Blue Overalls over Medium Blue Shirt, Red Hard Hat, Silver Sunglasses 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

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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.

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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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