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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.

Robot Command Center

Checking

6951 Robot Command Center

280 pieces in 98 part and color combinations, plus 3 minifigures.

The official piece count includes the 15 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

Blue 159 pieces

  • Arm Holder Brick 2 x 2 without Hole and 1 Arm Blue Part 792c01 ×2
  • Arm Piece Straight with 2 and 3 Fingers Blue Part 3612 Element 610123 ×10
  • Box 2 x 2 x 2 Door with Slot Blue Part 4346 Element 434623 ×4
  • Box 2 x 2 x 2 [Solid Studs] Blue Part 4345a ×4
  • Bracket 2 x 2 - 2 x 2 Blue Part 3956 Element 6019215 or 395623 ×3
  • Brick 1 x 1 Blue Part 3005 Element 300523 ×10
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×6
  • Brick 1 x 2 with Classic Space Logo Print Blue Part 3004pr9970 ×2
  • Brick 1 x 2 with White Down Arrow Print Blue Part 3004pr9975 ×2
  • Brick 1 x 4 with Bottom Tubes, Lowered Center Cross Support Blue Part 3010a ×2
  • Brick 1 x 6 with Bottom Tubes and 2 Lowered Cross Supports Blue Part 3009b ×4
  • Brick 2 x 2 without Inside Ridges Blue Part 3003a ×5
  • Brick 2 x 3 without Cross Supports Blue Part 3002a ×4
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×8
  • Brick Round 2 x 2 x 2 with Axle Hole and Fins Blue Part 4591 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Blue Part 3040b Element 4121936 or 304023 ×2
  • Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×2
  • Brick Sloped 45° 2 x 2 with Black Grill Print Blue Part 3039pr0009 ×3
  • Brick Sloped 45° 2 x 2 with Computer Panel Print Blue Part 3039pr9994 ×2
  • Brick Sloped 45° 2 x 2 with Computer Screen Print Blue Part 3039pr0026 Element 4190885 ×2
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Blue Part 3747a Element 4500460 or 374723 ×4
  • Brick Sloped Inverted 45° 2 x 2 with Computer Screen and Right Side Buttons Print Blue Part 3660pr0001 ×2
  • Cockpit 6 x 6 x 1 Cabin Base Blue Part 4597 Element 459723 ×2
  • Hinge Brick 1 x 4 [Lower] Blue Part 3831 Element 6320053 or 383123 ×4
  • Hinge Brick 1 x 4 [Upper] Blue Part 3830 Element 6392876 or 6320054 ×4
  • Hinge Tile 1 x 4 Blue Part 4625 Element 462523 ×2
  • Hinge Vehicle Roof 4 x 4 Blue Part 4213 Element 4240387 or 421323 ×1
  • Hinge Vehicle Roof Holder 1 x 4 Blue Part 4315 Element 4256388 or 4167102 ×5
  • Plate 1 x 1 Blue Part 3024 Element 302423 ×2
  • Plate 1 x 10 Blue Part 4477 Element 447723 ×1
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×10
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×2
  • Plate 1 x 6 Blue Part 3666 Element 366623 ×4
  • Plate 2 x 10 Blue Part 3832 Element 383223 ×1
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×3
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Blue Part 4081b Element 6281991 or 4632567 ×4
  • Plate Special 1 x 1 with Clip Vertical [Thin Open O Clip] Blue Part 4085a ×4
  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) Blue Part 4596 ×4
  • Plate Special 1 x 4 Offset with Bar Holes Blue Part 4590 Element 4541292 or 4248164 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Blue Part 3829c01 Element 9566 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Blue Part 3702 Element 370223 ×3
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×2
  • Turntable 2 x 2 Plate, Base Blue Part 3680 Element 368023 ×1
  • Window 1 x 4 x 3 Train with All Studs Hollow Blue Part 4033 Element 4141273 ×4
  • Window 4 x 4 x 3 Roof Blue Part 4447 ×2
  • Windscreen 6 x 4 x 2 Canopy Blue Part 4474 ×4

Light Gray 70 pieces

  • Arm Grab Jaw Light Gray Part 4221 Element 422102 ×4
  • Arm Grab Jaw Holder, 3 Fingers Light Gray Part 4220 Element 4114366 or 4109693 ×2
  • Brick 1 x 2 with Black Grill Print Light Gray Part 3004pr9981 ×2
  • Brick Round 2 x 2 with Axle Hole Light Gray Part 3941 Element 614302 or 394102 ×2
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×1
  • Dish 4 x 4 Inverted [Radar] Light Gray Part 3960 Element 4143013 or 396002 ×2
  • Dish 6 x 6 Inverted, Radar / Webbed [No Anti-studs] Light Gray Part 4285a ×1
  • Engine, Strakes, 2 x 2 Thin Top Plate Light Gray Part 4229 ×4
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Light Gray Part 4349 Element 434902 ×6
  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×5
  • Hinge Brick 1 x 2 Top Plate Thin Light Gray Part 3938 Element 393802 ×5
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×3
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×1
  • Plate 2 x 3 Light Gray Part 3021 Element 302102 ×1
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×2
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×5
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Light Gray Part 4081b Element 408102 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×4
  • Plate Special 1 x 2 with Ladder Light Gray Part 4175 Element 4100526 or 417502 ×2
  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) Light Gray Part 4596 Element 4188363 or 459602 ×1
  • Plate Special 1 x 4 Offset with Bar Holes Light Gray Part 4590 Element 4248161 or 4114067 ×2
  • Plate Special 2 x 2 with Wheels Red Light Gray Part 122c01 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×3
  • Technic Brick 1 x 2 [1 Pin Hole] Light Gray Part 3700 Element 370002 ×1
  • Technic Brick 1 x 4 [3 Pin Holes] Light Gray Part 3701 Element 370102 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Wedge Plate 4 x 4 Wing Left Light Gray Part 3936 Element 4248128 or 4248125 ×1
  • Wedge Plate 4 x 4 Wing Right Light Gray Part 3935 Element 4248118 or 393502 ×1

Trans-Red 15 pieces

  • Antenna 1 x 4 with Rounded Top Trans-Red Part 3957a Element 6065498 or 4106520 ×2
  • Brick Round 1 x 1 Open Stud Trans-Red Part 3062b Element 6514235 or 6238673 ×3
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×8
  • Shield Round with Stud Trans-Red Part 3876 ×2

Trans-Yellow 12 pieces

  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2
  • Glass for Window 4 x 4 x 3 Roof Trans-Yellow Part 4448 ×2
  • Hinge Vehicle Roof 4 x 4 Trans-Yellow Part 4213 Element 421344 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×6

Black 11 pieces

  • Brick Round 2 x 2 x 2 with Axle Hole and Fins Black Part 4591 Element 459126 ×1
  • Cone 2 x 2 x 2, Open Stud Black Part 3942c Element 6092664 or 6022160 ×1
  • Equipment Radio [Compact Handle] Black Part 3962a ×1
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Black Part 4349 Element 434926 ×2
  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4
  • Weapon Gun / Torch (Space) [with Grooves] Black Part 3959 Element 4254942 or 395976 ×2

White 9 pieces

  • Bracket 2 x 2 - 2 x 2 White Part 3956 Element 6313593 or 395601 ×1
  • Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×3
  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) White Part 4596 Element 6287500 or 4625000 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×2
  • Weapon Gun / Torch (Space) [with Grooves] White Part 3959 Element 4550643 or 395951 ×1

Trans-Green 4 pieces

  • Plate 1 x 1 Trans-Green Part 3024 Element 6513967 or 6252046 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 ×2

Minifigures 3 figures

  • Classic Spaceman, Yellow with Airtanks (3842b Helmet) Minifigure, checked as a whole figure ×1
  • Classic Spaceman, Red with Airtanks (3842b Helmet) Minifigure, checked as a whole figure ×1
  • Classic Spaceman, Black with Airtanks (3842b Helmet) 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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