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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.

Doc Ock's Fusion Lab

Checking

4857 Doc Ock's Fusion Lab

201 pieces in 101 part and color combinations, plus 4 minifigures.

The piece count includes the 37 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

Red 47 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×9
  • Brick 1 x 2 x 2 with Inside Axle Holder Red Part 3245b ×2
  • Brick 1 x 6 Red Part 3009 Element 300921 ×2
  • Brick 1 x 8 Red Part 3008 Element 300821 ×1
  • Brick 2 x 2 Corner Red Part 2357 Element 235771 or 235721 ×5
  • Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Red Part 3307 Element 330721 ×1
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×6
  • Brick Special 1 x 2 with Grille Red Part 2877 Element 6219677 or 287721 ×8
  • Brick Special 1 x 4 with Groove Red Part 2653 Element 4568268 or 4530013 ×2
  • Door 1 x 3 x 1 Left Red Part 3822 Element 4288209 or 4188202 ×1
  • Door 1 x 3 x 1 Right Red Part 3821 Element 4537986 or 4288208 ×1
  • Hinge Plate 1 x 4 Locking Dual 1 Finger Red Part 44568 Element 4193481 ×1
  • Hinge Plate 3 x 4 Locking Dual 2 Finger, 9 Teeth Red Part 44570 Element 4184177 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×1
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×1
  • Tile 1 x 4 with Groove Red Part 2431 Element 243121 ×1

White 41 pieces

  • Bag / Briefcase White Part 4449 Element 4154858 or 444901 ×1
  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×2
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×1
  • Brick Sloped 33° 3 x 4 with Star of Life and Grill Print White Part 3297pr0025 Element 4240858 ×1
  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs White Part 45677 Element 4193068 or 456771 ×1
  • Equipment Stretcher White Part 4714 Element 471401 ×1
  • Equipment Stretcher Wheels White Part 4715 Element 471501 ×2
  • Panel 1 x 4 x 3 [Hollow Studs] White Part 4215b ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×1
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×2
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate 4 x 6 White Part 3032 Element 303201 ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] White Part 2540 Element 4140583 or 254051 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) White Part 3794a ×1
  • Plate Special 4 x 4, Studs on One Edge Plain] White Part 6179 Element 6550149 or 617901 ×1
  • String with End Studs and Minifig Grips 21L White Part 14210 Element 6096959 or 6037448 ×1
  • Tile 1 x 2 with Simple Computer Keyboard Print White Part 3069bpr0049 Element 4227921 or 81890 ×1
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×6
  • Tile Special 1 x 1 with Clip and Straight Tips White Part 2555 Element 255501 ×1
  • Vehicle Base 4 x 5 with Wheel Arches, 2 x 2 Opening White Part 4211 Element 4289273 or 4239391 ×2
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin White Part 6014b Element 4170457 ×4

Black 25 pieces

  • Bar 6.6L with Stop Ring [Umbrella Stand] Black Part 4095 Element 409526 ×1
  • Brick Special 1 x 1 Studs on 4 Sides Black Part 4733 Element 473326 ×1
  • Door 1 x 4 x 5 with 4 Panes, Squared Base Black Part 3861b Element 4239372 or 386126 ×1
  • Fence Lattice 1 x 4 x 1 Black Part 3633 Element 4187209 or 363326 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×4
  • Plate 2 x 12 Black Part 2445 Element 244526 ×1
  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×4
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×1
  • Tyre 21 x 12 with Offset Tread Small Wide Black Part 6015 Element 601526 ×4
  • Window 1 x 2 x 3 Pane Black Part 3854 Element 4239393 or 385426 ×4
  • Window 1 x 4 x 3 Black Part 3853 Element 4216388 or 4189082 ×2

Dark Bluish Gray 25 pieces

  • Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 ×1
  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×1
  • Brick 1 x 4 Dark Bluish Gray Part 3010 Element 4211103 ×1
  • Brick 1 x 6 Dark Bluish Gray Part 3009 Element 4211100 ×1
  • Brick 2 x 2 Corner Dark Bluish Gray Part 2357 Element 4211109 ×1
  • Brick 2 x 6 Dark Bluish Gray Part 2456 Element 4282819 or 4210875 ×1
  • Brick Sloped 45° 2 x 2 Dark Bluish Gray Part 3039 Element 4211054 ×1
  • Dish 2 x 2 Inverted [Radar] Dark Bluish Gray Part 4740 Element 4211010 ×1
  • Hinge Brick 1 x 4 [Lower] Dark Bluish Gray Part 3831 Element 4210795 ×1
  • Hinge Brick 1 x 4 [Upper] Dark Bluish Gray Part 3830 Element 6327414 or 6011461 ×1
  • Plate 1 x 6 Dark Bluish Gray Part 3666 Element 4211056 ×2
  • Plate 2 x 10 Dark Bluish Gray Part 3832 Element 4210678 ×3
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×2
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×2
  • Plate 2 x 6 Dark Bluish Gray Part 3795 Element 4211002 ×1
  • Plate Special 4 x 6 x 2/3 with Trap Door Hinge Dark Bluish Gray Part 30042 Element 4211077 ×1
  • Plate Special 6 x 8 Trap Door Frame Horizontal Dark Bluish Gray Part 30041 Element 4210784 ×1
  • Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole Dark Bluish Gray Part 3940b Element 4211110 ×1
  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×1
  • Trash Can with 2 Cover Holders Dark Bluish Gray Part 2439 Element 4210985 ×1

Blue 18 pieces

  • Arm Mechanical with 2 Clips [Battle Droid] Blue Part 30377 Element 4237836 1 spare in the box ×8
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch Blue Part 3063b Element 4497190 or 4239392 ×4
  • Panel 1 x 2 x 1 [Square Corners] Blue Part 4865a Element 486523 ×3
  • Steering Stand 1 x 2 with Black Steering Wheel Blue Part 3829c01 Element 9566 ×1
  • Technic Beam 1 x 3 Thin Blue Part 6632 Element 6344176 or 4107829 ×1
  • Tile Special 1 x 2 with Handle Blue Part 2432 Element 243223 ×1

Light Bluish Gray 13 pieces

  • Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Light Bluish Gray Part 3307 Element 4221600 ×5
  • Plate 6 x 14 Light Bluish Gray Part 3456 Element 4293831 or 4239371 ×2
  • Plate Special 2 x 2 with Wheel Holders Light Bluish Gray Part 4600 Element 4211504 ×2
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Bluish Gray Part 32123a 1 spare in the box ×1
  • Technic Gear 8 Tooth Light Bluish Gray Part 3647 Element 4211432 or 3647194 ×1
  • Technic Gear Rack 1 x 4 Light Bluish Gray Part 3743 Element 6457283 or 4211450 ×2

Trans-Red 10 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×6
  • Tile Special 1 x 2 Grille with Bottom Groove Trans-Red Part 2412b Element 6250158 or 4190187 ×4

Yellow 9 pieces

  • Cone 1 x 1 [No Top Groove] Yellow Part 4589 Element 458924 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×1
  • Tile 2 x 2 with Groove Yellow Part 3068b Element 6388487 or 306824 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Yellow Part 2412b Element 241224 ×1
  • Torso Mechanical, Battle Droid Yellow Part 30375 Element 6449913 or 4521511 ×4

Trans-Yellow 4 pieces

  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2
  • Tile 1 x 1 with Groove Trans-Yellow Part 3070b Element 6636668 or 6088721 ×2

Trans-Clear 2 pieces

  • Brick Round 1 x 1 Open Stud Trans-Clear Part 3062b Element 6514232 or 6223655 ×2

Trans-Dark Blue 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Dark Blue Part 6141 Element 6514055 or 6240214 1 spare in the box ×2

Trans-Purple 2 pieces

  • Dish 3 x 3 Inverted [Radar] Trans-Purple Part 43898 Element 4237768 ×2

Trans-Brown 1 piece

  • Panel 1 x 4 x 3 [Hollow Studs] Trans-Brown Part 4215b Element 4163113 ×1

Trans-Light Blue 1 piece

  • Windscreen 2 x 4 x 2 Trans-Light Blue Part 3823 Element 6581802 or 6253682 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 4857-1 [No Color/Any Color] Part 50882 Element 4238527 ×1

Minifigures 4 figures

  • Harry Osborn in Pinstriped Suit Minifigure, checked as a whole figure ×1
  • Dr. Octopus / Doc Ock with Green Glasses and Light Nougat Arms Minifigure, checked as a whole figure ×1
  • Spider-Man with Dark Blue Arms and Legs Minifigure, checked as a whole figure ×1
  • Ambulance Driver / Paramedic with Star of Life Badge 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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