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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.

Message Intercept Base

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6987-2 Message Intercept Base

543 pieces in 147 part and color combinations, plus 5 minifigures.

The piece count includes the 30 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

Black 423 pieces

  • Bar 1 x 3 [Clip / Anti-Stud] Black Part 4735 Element 4141580 or 473576 ×2
  • Bar 1 x 4 x 2 with Studs Black Part 4083 Element 408326 ×2
  • Bar 1 x 6 [Open Studs] Black Part 4873 ×4
  • Box 2 x 2 x 2 Door with Slot Black Part 4346 Element 6191994 or 434626 ×1
  • Box 2 x 2 x 2 [Solid Studs] Black Part 4345a ×1
  • Bracket 1 x 2 - 1 x 4 [Square Corners] Black Part 2436 Element 4282746 or 243626 ×2
  • Bracket 2 x 2 - 2 x 2 Black Part 3956 Element 6254808 or 6019217 ×1
  • Bracket 8 x 2 x 1 1/3 Black Part 4732 Element 473226 ×1
  • Brick 1 x 1 Black Part 3005 Element 300526 ×7
  • Brick 1 x 1 x 5 with Blocked Open or Hollow Stud Black Part 2453a Element 245326 ×1
  • Brick 1 x 16 Black Part 2465 Element 246576 or 246526 ×6
  • Brick 1 x 2 Black Part 3004 Element 300426 ×15
  • Brick 1 x 3 Black Part 3622 Element 362226 ×11
  • Brick 1 x 4 Black Part 3010 Element 301026 ×2
  • Brick 1 x 6 Black Part 3009 Element 300926 ×7
  • Brick 1 x 8 Black Part 3008 Element 300826 ×3
  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×10
  • Brick Arch 1 x 5 x 4 [Continuous Bow] Black Part 2339 Element 4519925 or 4159140 ×2
  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×15
  • Brick Sloped 45° 2 x 1 with Bottom pin, with 3 Red Lamps, 3 Yellow Buttons, Yellow Border Print Black Part 3040bpr0008 Element 4121976 or 81149 ×3
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×3
  • Brick Sloped 45° 2 x 2 with 12 Buttons, 3 Red Lamps, Yellow Panel Print Black Part 3039pr9995 ×3
  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Black Part 4460a ×6
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Black Part 3684 Element 4286874 or 4248065 ×2
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Black Part 3747a ×9
  • Brick Sloped Inverted 34° 3 x 1 without Internal Stopper Black Part 4287a ×5
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×11
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×12
  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Black Part 4871 Element 4188534 or 487126 ×1
  • Brick Sloped Inverted 75° 2 x 1 x 3 Black Part 2449 Element 4636202 or 4561789 ×4
  • Brick Special 1 x 1 Studs on 4 Sides Black Part 4733 Element 473326 ×4
  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×6
  • Dish 2 x 2 Inverted [Radar] Black Part 4740 Element 474026 ×2
  • Dish 8 x 8 Inverted [Radar], Solid Studs, Rounded Anti-stud Underside Black Part 3961 Element 4626901 or 4108123 ×1
  • Engine, Strakes, 2 x 2 Thin Top Plate Black Part 4229 Element 4552040 or 4163480 ×2
  • Equipment Camera with Side Sight [aka Space Gun] Black Part 4360 Element 436026 ×1
  • Equipment Control Panel Black Part 2342 Element 4164402 or 234226 ×2
  • Equipment Metal Detector Black Part 4479 Element 4501975 or 4212278 ×1
  • Equipment Radio [Compact Handle] Black Part 3962a ×1
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Black Part 4349 Element 434926 ×2
  • Fence Lattice 1 x 4 x 1 Black Part 3633 Element 4187209 or 363326 ×4
  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×7
  • Hinge Brick 1 x 2 Top Plate Thin Black Part 3938 Element 393826 ×7
  • Hinge Brick 1 x 4 [Lower] Black Part 3831 Element 383126 ×1
  • Hinge Brick 1 x 4 [Upper] Black Part 3830 Element 6344999 or 6011458 ×1
  • Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs Black Part 4276b Element 4264363 or 4256402 ×2
  • Hinge Plate 1 x 2 with 3 Fingers On Side Black Part 2452 Element 245226 ×2
  • Hinge Tile 1 x 4 Black Part 4625 Element 4280138 or 462526 ×2
  • Hinge Vehicle Roof 4 x 4 Black Part 4213 Element 421326 ×2
  • Lever Small Base with Yellow Lever Black Part 298c01 Element 74138 ×6
  • Panel 1 x 2 x 2 [Solid Studs] Black Part 4864a Element 4113021 ×1
  • Panel 10 x 6 x 11 with Blacktron I Logo Print Black Part 2408pr0002 ×2
  • Panel 3 x 2 x 6 Black Part 2466 ×10
  • Panel 3 x 3 x 6 Corner Wall Black Part 2345 Element 4272943 or 4160950 ×3
  • Panel 4 x 4 x 6 Corner Concave Black Part 2467 ×2
  • Panel 4 x 4 x 6 Corner Convex Ribbed Black Part 4737 ×2
  • Plate 1 x 1 Black Part 3024 Element 302426 ×5
  • Plate 1 x 2 Black Part 3023 Element 302326 ×16
  • Plate 1 x 3 Black Part 3623 Element 362326 ×18
  • Plate 1 x 4 Black Part 3710 Element 371026 ×11
  • Plate 1 x 6 Black Part 3666 Element 366626 ×3
  • Plate 1 x 8 Black Part 3460 Element 346026 ×1
  • Plate 2 x 10 Black Part 3832 Element 383226 ×3
  • Plate 2 x 16 Black Part 4282 Element 428276 or 428226 ×3
  • Plate 2 x 2 Black Part 3022 Element 302226 ×16
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×3
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 2 x 6 Black Part 3795 Element 379526 ×3
  • Plate 2 x 8 Black Part 3034 Element 303426 ×2
  • Plate 4 x 10 Black Part 3030 Element 303076 or 303026 ×1
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×2
  • Plate 4 x 6 Black Part 3032 Element 303226 ×3
  • Plate 6 x 12 Black Part 3028 Element 302826 ×1
  • Plate 6 x 8 Black Part 3036 Element 303676 or 303626 ×1
  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×12
  • Plate Special 1 x 2 with Ladder Black Part 4175 Element 6285241 or 6179557 ×2
  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) Black Part 4596 Element 459626 ×2
  • Plate Special 1 x 4 Offset with Bar Holes Black Part 4590 Element 6002559 or 4278029 ×5
  • Plate Special 2 x 2 with Pin on Bottom Black Part 2476a Element 6328479 ×2
  • Plate Special 2 x 2 with Wheel Holders Black Part 4600 Element 460026 ×2
  • Support 2 x 4 x 5 Stanchion Inclined [5mm wide posts] Black Part 4476b Element 6110030 or 4142131 ×14
  • Support 6 x 6 x 10 Stanchion Black Part 2681 Element 268126 ×2
  • Tail 4 x 2 x 2 Black Part 3479 Element 347976 or 347926 ×1
  • Technic Axle 10 Black Part 3737 Element 373726 ×1
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×4
  • Technic Rack Winder [Complete Assembly] Black Part 2426c01 ×2
  • Tile 1 x 2 with Arrow Long Yellow with Black Border Print Black Part 3069bpr9981 Element 81067 ×2
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×3
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×4
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×4
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×2
  • Tile 2 x 2 with Yellow Arrow without Border Print Black Part 3068bpr0021 Element 81152 ×1
  • Tile Special 1 x 2 Grille without Bottom Groove Black Part 2412a ×1
  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1
  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×3
  • Weapon Gun / Torch (Space) [with Grooves] Black Part 3959 Element 4254942 or 395976 ×3
  • Wedge Plate 10 x 10 with 4x4 Cutout and Cut Corner Black Part 2401 Element 240126 ×3
  • Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×4
  • Wedge Plate 3 x 4 without Stud Notches Black Part 4859 ×1
  • Wedge Plate 4 x 4 Wing Left Black Part 3936 Element 4280156 or 4189084 ×2
  • Wedge Plate 4 x 4 Wing Right Black Part 3935 Element 4280157 or 4189086 ×1
  • Wedge Plate 8 x 4 Wing Right without Stud Notch Black Part 3934a ×1
  • Wedge, Plate 8 x 4 Wing Left without Underside Stud Notch Black Part 3933a ×1
  • Wheel Balloon with Axle hole Black Part 4288 Element 4113076 or 428876 ×4

Yellow 59 pieces

  • Antenna 1 x 4 with Rounded Top Yellow Part 3957a Element 4497183 or 395724 ×2
  • Bracket 3 x 2 - 2 x 2 [aka Space Seat] Yellow Part 4598 Element 459824 ×1
  • Cone 2 x 2 x 2, Open Stud Yellow Part 3942c Element 6055404 or 6022159 ×2
  • Dish 4 x 4 Inverted [Radar] Yellow Part 3960 Element 396024 ×2
  • Fence Lattice 1 x 4 x 1 Yellow Part 3633 Element 4190509 or 363324 ×6
  • Flexible Hose 8.5L with Tabless Ends Black (Ends different color than Tube) Yellow Part 73590c01b ×3
  • Plate 1 x 1 Yellow Part 3024 Element 302424 ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×3
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×10
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×1
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×1
  • Plate 4 x 8 Yellow Part 3035 Element 303524 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thin U Clip] Yellow Part 4085b ×5
  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) Yellow Part 4596 ×2
  • Technic Rack 1 x 20 x 2/3 Yellow Part 2428 ×2
  • Tile 1 x 1 with Red and Black Buttons Print Yellow Part 3070bpr0031 Element 81183 ×2
  • Tile 1 x 2 with Space Computer Print Yellow Part 3069bpr0039 Element 4189080 ×5
  • Tile 2 x 2 with Groove Yellow Part 3068b Element 6388487 or 306824 ×2
  • Wedge Plate 3 x 6 Cut Corners Yellow Part 2419 Element 6207376 or 241924 ×2
  • Wheel 8 x 6 Yellow Part 4624 Element 6133542 or 462424 ×4

Trans-Red 43 pieces

  • Antenna 1 x 4 with Rounded Top Trans-Red Part 3957a Element 6065498 or 4106520 ×9
  • Brick Round 1 x 1 Open Stud Trans-Red Part 3062b Element 6514235 or 6238673 ×11
  • Brick Round 1 x 1 with Fins, Open Stud Trans-Red Part 4588 Element 458841 ×1
  • Cone 1 x 1 [No Top Groove] Trans-Red Part 4589 Element 618841 ×1
  • Dish 2 x 2 Inverted [Radar] Trans-Red Part 4740 Element 6580377 or 6245303 ×11
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×8
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×2

Trans-Yellow 12 pieces

  • Panel 1 x 2 x 3 - Solid Studs Trans-Yellow Part 2362a ×2
  • Panel 1 x 4 x 3 [Solid Studs] Trans-Yellow Part 4215a ×1
  • Panel 10 x 10 x 12 Quarter Dome Trans-Yellow Part 2409 ×1
  • Panel 3 x 2 x 5 2/3 Trans-Yellow Part 2448 ×1
  • Panel 3 x 2 x 6 Trans-Yellow Part 2466 ×3
  • Panel 3 x 3 x 6 Corner Convex Trans-Yellow Part 2468 ×3
  • Plate 4 x 6 Trans-Yellow Part 3032 Element 303244 ×1

Light Gray 6 pieces

  • Baseplate 32 x 32 Light Gray Part 3811 Element 4221067 or 4155361 ×1
  • Baseplate Raised 32 x 32 Craters without Crater Studs Light Gray Part 3947a ×1
  • Technic Universal Joint 4L [Complete Assembly] Light Gray Part 9244 Element 9244 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×3

Minifigures 5 figures

  • Blacktron I (3626a Head) Minifigure, checked as a whole figure ×5

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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