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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.

Spider-Man's Doc Ock Ambush

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6873 Spider-Man's Doc Ock Ambush

264 pieces in 96 part and color combinations, plus 3 minifigures.

LEGO counts 295 pieces. This inventory comes from a separate parts catalog and lists 296, including the 32 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

Bricks Sloped 32 pieces

  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Black Part 61409 Element 4541191 ×4
  • Brick Sloped 18° 4 x 1 Black Part 60477 Element 4515362 ×2
  • Brick Sloped 33° 3 x 2 Black Part 3298 Element 329826 ×5
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×6
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×1
  • Brick Sloped Inverted 45° 4 x 4 Double with 4 x 2 Recessed, 2 Holes Black Part 72454 Element 4658977 ×1
  • Brick Sloped 30° 1 x 2 x 2/3 Dark Bluish Gray Part 85984 Element 4567887 ×4
  • Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Medium Blue Part 54200 Element 4565363 3 spares in the box ×6
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin White Part 3747b Element 4500469 ×1

Bricks 30 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×4
  • Brick 1 x 10 Black Part 6111 Element 611126 ×1
  • Brick 1 x 2 x 2 with Inside Stud Holder Black Part 3245c Element 4618852 ×6
  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×2
  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×11
  • Brick 2 x 3 Light Bluish Gray Part 3002 Element 4211386 ×2
  • Brick 1 x 4 Medium Blue Part 3010 Element 4165458 or 4163696 ×3
  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×1

Bricks Round and Cones 28 pieces

  • Cylinder Half 2 x 4 x 4 Medium Blue Part 6259 Element 6003185 ×2
  • Cone 1 x 1 [Top Groove] Trans-Brown Part 59900 Element 6514019 or 6301323 ×4
  • Brick Round 1 x 1 Open Stud Trans-Light Blue Part 3062b Element 6514238 or 6238677 ×22

Plates 17 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×2
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×2
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×2
  • Plate 1 x 2 Medium Blue Part 3023 Element 4179825 or 4165460 ×2
  • Plate 1 x 4 Medium Blue Part 3710 Element 4179828 ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×3

Plates Round Curved and Dishes 16 pieces

  • Plate Round 4 x 4 with Pin Hole Black Part 60474 Element 4515350 Also in Dark Bluish Gray ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 ×1
  • Plate Round 4 x 4 with Pin Hole Dark Bluish Gray Part 60474 Element 4528323 Also in Black ×1
  • Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 1 spare in the box ×8
  • Dish 3 x 3 Inverted [Radar] Trans-Clear Part 43898 Element 6507917 or 6244730 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×4

Bricks Curved 13 pieces

  • Brick Arch 1 x 6 x 2 Curved Top Black Part 6183 Element 6132770 or 4299388 ×2
  • Brick Curved 2 x 3 Black Part 6215 Element 4227682 or 4125134 ×2
  • Brick Arch 1 x 6 Raised Arch Dark Bluish Gray Part 92950 Element 4620760 ×5
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Light Bluish Gray Part 6091 Element 6285778 or 4211519 ×4

Bricks Special 13 pieces

  • Brick Special 1 x 2 with Grille Black Part 2877 Element 287726 ×7
  • Brick Special 1 x 2 with 2 Pins, Round Pin Holes Dark Bluish Gray Part 30526 Element 4210697 ×2
  • Brick Special 1 x 1 with Stud on 1 Side White Part 87087 Element 6550190 or 4558952 ×4

Technic Bricks 13 pieces

  • Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 Also in Dark Bluish Gray ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] Dark Bluish Gray Part 32000 Element 4210762 Also in Black ×2
  • Technic Brick 1 x 2 [2 Pin Holes] Light Bluish Gray Part 32000 Element 4211541 ×1
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] White Part 32064b ×2

Technic Pins 13 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×3
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×5
  • Technic Pin 1/2 with 2L Bar Extension Light Bluish Gray Part 61184 Element 6347715 or 4520320 ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×1

Hinges, Arms and Turntables 10 pieces

  • Hinge Brick 1 x 4 [Lower] Black Part 3831 Element 383126 ×4
  • Hinge Brick 1 x 4 [Upper] Black Part 3830 Element 6344999 or 6011458 ×4
  • Turntable 4 x 4 Square Base, Locking Black Part 61485 Element 4517986 ×2

Panels 9 pieces

  • Panel 1 x 2 x 1 [Rounded Corners] Black Part 4865b Element 6146220 ×1
  • Panel 1 x 2 x 3 [Side Supports / Hollow Studs] Light Bluish Gray Part 87544 Element 4585429 ×4
  • Panel 1 x 6 x 5 Light Bluish Gray Part 59349 Element 4527174 ×1
  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Trans-Brown Part 87552 Element 6581810 or 6253217 ×2
  • Panel 1 x 2 x 1 [Square Corners] Trans-Light Blue Part 4865a Element 4618924 or 4239181 ×1

Plates Special 8 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Black Part 3794b Element 379426 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Dark Bluish Gray Part 2444 Element 4196768 ×2
  • Wedge Plate 8 x 6 x 2/3 with Grille Dark Bluish Gray Part 30036 Element 4527144 ×1
  • Plate Special 2 x 4 with Pins Light Bluish Gray Part 30157 Element 4211572 ×2
  • Plate Special 6 x 6 x 2/3 Cross with Dome Light Bluish Gray Part 30303 Element 4211611 ×1

Plates Wedged 8 pieces

  • Wedge Plate 3 x 6 Cut Corners Black Part 2419 Element 241926 ×1
  • Wedge Plate 4 x 6 Cut Corners Light Bluish Gray Part 32059 Element 4211725 ×2
  • Wedge Plate 4 x 9 without Stud Notches Light Bluish Gray Part 2413 Element 4211558 ×1
  • Wedge Plate 6 x 6 Cut Corner Light Bluish Gray Part 6106 Element 4211520 ×2
  • Wedge Plate 3 x 3 Cut Corner Medium Blue Part 2450 Element 6003184 ×2

Wheels and Tyres 8 pieces

  • Tyre 24 x 14 Shallow Tread (Tread Small Hub) Black Part 30648 Element 4524358 or 4153005 ×4
  • Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes White Part 55981 Element 6359828 or 6260609 ×4

Bricks Wedged 7 pieces

  • Brick Wedged 2 x 2 Facet Black Part 87620 Element 4584274 ×6
  • Brick Wedged, Curved 4 x 4 No Top Studs Black Part 47753 Element 4219107 ×1

Technic Connectors 6 pieces

  • Technic Axle Connector 2 x 3 with Ball Socket, Open Lower Axle Holes Black Part 93571 Element 4610948 ×1
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×5

Tiles 5 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×2
  • Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×3

Tiles Special 5 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×3
  • Tile Special 1 x 2 with Handle Black Part 2432 Element 243226 ×2

Minifig Upper Body 4 pieces

  • Arm Mechanical with 2 Clips [Battle Droid] Black Part 30377 Element 6330086 or 4223247 1 spare in the box ×4

Transportation - Sea and Air 4 pieces

  • Jet Engine Fan with 10 Blades and Technic Pin Black Part 46667 Element 6313481 or 6088638 ×1
  • Wing, Tail 4 x 1 x 3 Black Part 2340 Element 6591863 or 4651541 ×2
  • Technic Cylinder 4 x 4 with Pin Holes and Centre Bar, Closed Sides on Bar Light Bluish Gray Part 41531 Element 4507052 or 4285324 ×1

Tubes and Hoses 4 pieces

  • Flexible Ribbed Hose 8mm Ends 19L Flat Silver Part 57539 Element 6044636 or 4615232 ×2
  • Hose, Ribbed 7mm D. 2L / 1.6cm Flat Silver Part 78c02 Element 6525133 or 4620070 1 spare in the box ×2

Bars, Ladders and Fences 3 pieces

  • Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye Trans-Bright Green Part 58176 Element 6507869 or 6171864 ×3

Gear Parts 1 piece

  • Comic Book, Super Heroes, Marvel, Issue 5 [No Color/Any Color] Part 6013294 ×1

Stickers 1 piece

  • Sticker Sheet for Set 6873 -1 [No Color/Any Color] Part 10868 Element 6008007 ×1

String, Bands and Reels 1 piece

  • String with End Studs and Minifig Grips 21L White Part 14210 Element 6096959 or 6037448 ×1

Technic Axles 1 piece

  • Technic Axle 6 Black Part 3706 Element 370626 ×1

Technic Special 1 piece

  • Technic Brick Special 2 x 2 with Solid Ball and Axle Hole Dark Bluish Gray Part 57909a ×1

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Bottom Cross Black Part 4150 Element 415076 or 415026 ×1

Transportation - Land 1 piece

  • Wheel Arch, Mudguard 4 x 2 1/2 x 2 with 2 x 2 Plate Black Part 50745 Element 4260488 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 3 x 6 x 5 Bubble with Studs on Top [Plain] Trans-Brown Part 30366 Element 4124103 ×1

Minifigures 3 figures

  • Spider-Man Minifigure, checked as a whole figure ×1
  • Iron Fist Minifigure, checked as a whole figure ×1
  • Dr. Octopus / Doc Ock with Red Sunglasses and Light Bluish Gray Suit 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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