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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.

Technic Control Center

Checking

9700 Technic Control Center

471 pieces in 125 part and color combinations, plus 4 minifigures.

LEGO counts 471 pieces. This inventory comes from a separate parts catalog and lists 487, including the 16 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.

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Piece checklist

Black 154 pieces

  • 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 ×2
  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×4
  • Hair Smooth Black Part 3901 Element 390176 or 390126 ×1
  • Helmet, Standard Black Part 2446 Element 6020155 or 4654642 ×1
  • Plate 1 x 10 Black Part 4477 Element 447726 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×10
  • Plate 1 x 3 Black Part 3623 Element 362326 ×4
  • Plate 1 x 4 Black Part 3710 Element 371026 ×6
  • Plate 1 x 6 Black Part 3666 Element 366626 ×6
  • Plate 1 x 8 Black Part 3460 Element 346026 ×2
  • Plate 2 x 10 Black Part 3832 Element 383226 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×8
  • Plate 2 x 4 Black Part 3020 Element 302026 ×5
  • Plate 2 x 6 Black Part 3795 Element 379526 ×4
  • Plate 4 x 10 Black Part 3030 Element 303076 or 303026 ×2
  • Plate 4 x 6 Black Part 3032 Element 303226 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×4
  • Rubber Band Large [Square Cross Section] Black Part 70158 ×12
  • Rubber Band Medium (Square Cross Section) Thin Cut Black Part 70012 Element 70012 ×6
  • Rubber Band Small 13mm (Square Cross Section) Black Part 71509 Element 4141606 or 4107153 ×6
  • Sensor, Light, 4.5V Black Part upn0178 ×1
  • Sensor, Touch, 4.5V Black Part upn0196 ×2
  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle 2 Black Part 3704 Element 370426 ×4
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×4
  • Technic Axle 4 Black Part 3705 Element 370526 ×4
  • Technic Axle 6 Black Part 3706 Element 370626 ×4
  • Technic Axle 8 Black Part 3707 Element 370726 ×4
  • Technic Plate 1 x 5 with Toothed Ends, 2 Studs and Center Axle Hole Black Part 2711 Element 4279391 or 4195722 ×6
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×5
  • Technic Plate 2 x 8 [7 Holes] Black Part 3738 Element 373826 ×2
  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×4
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×4
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×4
  • Tyre 43 x 17 Black Part 3634 Element 4523564 or 363426 ×4
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×4
  • Wire with 2-Prong Connectors, 12V / 4.5V 375L Black Part 766c375 ×1

Light Gray 115 pieces

  • Baseplate 24 x 24 Light Gray Part 367a ×1
  • Electric Connector / Plug Holder 4.5V/12V Light Gray Part 2757 ×5
  • Motor, 4.5V Type 2 for 2-Prong Connectors with Middle Pin Light Gray Part 6216b ×2
  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×8
  • Technic Axle and Pin Connector Toggle Joint Toothed [with Slots] Light Gray Part 4273b Element 427302 ×4
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×12
  • Technic Bush 1/2 Toothed Type I [+ Opening] Light Gray Part 4265a Element 426502 ×20
  • Technic Gear 14 Tooth Bevel Light Gray Part 4143 Element 414352 or 414302 ×2
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×2
  • Technic Gear 24 Tooth Crown with Flat Teeth Light Gray Part 3650a ×1
  • Technic Gear 24 Tooth [Old Style - Three axle holes] Light Gray Part 3648a ×4
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×2
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×4
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×4
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×15
  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×6
  • Technic Worm Gear Light Gray Part 4716 Element 471602 ×2
  • Tile 1 x 2 with Groove Light Gray Part 3069b Element 306902 ×4
  • Wheel 24 x 43 Technic Light Gray Part 3739 Element 4248525 ×1
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×8
  • Wire with 2-Prong Connectors, 12V / 4.5V 14L Light Gray Part 766c14 ×5
  • Wire with 2-Prong Connectors, 12V / 4.5V 375L Light Gray Part 766c375 ×1

Red 90 pieces

  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×10
  • Brick 1 x 3 Red Part 3622 Element 362221 ×2
  • Brick 1 x 4 Red Part 3010 Element 301021 ×4
  • Brick 1 x 6 Red Part 3009 Element 300921 ×2
  • Brick 1 x 8 Red Part 3008 Element 300821 ×2
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×7
  • Brick Round 1 x 1 Open Stud Red Part 3062b Element 306221 ×4
  • Brick Sloped 33° 3 x 2 Red Part 3298 Element 329821 ×2
  • Brick Sloped 33° 3 x 4 Red Part 3297 Element 329721 ×3
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×2
  • Brick Sloped 45° 2 x 4 Red Part 3037 Element 303721 ×7
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Red Part 3747a Element 374721 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×2
  • Brick Special 2 x 6 x 2 Weight with Sealed Bottom and Dimples on Ends Red Part 73090b Element 74160 ×1
  • Helmet, Standard Red Part 2446 Element 6020371 or 4610060 ×1
  • Hinge Brick 1 x 4 [Lower] Red Part 3831 Element 6512257 or 6397573 ×1
  • Hinge Brick 1 x 4 [Upper] Red Part 3830 Element 6397607 or 6011464 ×1
  • Plate Special 1 x 4 with Towball Red Part 3184 Element 318421 ×1
  • Technic Brick 1 x 12 [11 Pin Holes] Red Part 3895 Element 389521 ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×6
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×7
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×5
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×5
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×4
  • Wire with 2-Prong Connectors, 12V / 4.5V 375L Red Part 766c375 ×1

Blue 80 pieces

  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×10
  • Brick 1 x 3 Blue Part 3622 Element 362223 ×2
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×4
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×2
  • Brick 1 x 8 Blue Part 3008 Element 300823 ×2
  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×7
  • Brick Sloped 33° 3 x 1 Blue Part 4286 Element 428623 ×2
  • Brick Sloped 33° 3 x 2 Blue Part 3298 Element 6294307 or 6141996 ×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 Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Blue Part 3747a Element 4500460 or 374723 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Blue Part 3660 Element 366023 ×2
  • Cone 4 x 4 x 2 Hollow No Studs Blue Part 4742 Element 6209667 or 6077615 ×1
  • Helmet, Standard Blue Part 2446 Element 6013414 or 4569132 ×1
  • Plate Special 1 x 4 with Towball Blue Part 3184 ×1
  • Storage Case Container, Technic, Bottom Blue Part 4963 ×1
  • Storage Case Container, Technic, Lid Blue Part 4962 ×1
  • Technic Brick 1 x 12 [11 Pin Holes] Blue Part 3895 Element 389523 ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Blue Part 3703 Element 370323 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×6
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×7
  • Technic Brick 1 x 6 [5 Pin Holes] Blue Part 3894 Element 389423 ×5
  • Technic Brick 1 x 8 [7 Pin Holes] Blue Part 3702 Element 370223 ×5
  • Tile 1 x 2 with Groove Blue Part 3069b Element 306923 ×4
  • Wire with 2-Prong Connectors, 12V / 4.5V 375L Blue Part 766c375 ×1

White 17 pieces

  • Door 1 x 4 x 5 with 4 Panes, Squared Base White Part 3861b Element 4160992 or 386101 ×1
  • Technic Cable Holder White Part 70376 Element 70376 ×12
  • Technic Disc 3 x 3 with 4 Black Sections on One Side and 8 on Reverse Print [Speed Sensor] White Part 2723pr0005 ×1
  • Window 1 x 2 x 3 Pane White Part 3854 Element 385401 ×2
  • Window 1 x 4 x 3 White Part 3853 Element 4175392 or 385301 ×1

Yellow 9 pieces

  • Light Brick 2 x 2 Type 2 - 4.5V [Complete] Yellow Part 265bc01 ×4
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×4
  • Wire with 2-Prong Connectors, 12V / 4.5V 375L Yellow Part 766c375 ×1

Trans-Green 2 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Green Part 3065 Element 6514266 or 6244908 ×2

Trans-Red 2 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×2

Trans-Yellow 2 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Yellow Part 3065 Element 6514265 or 6244907 ×2

Minifigures 4 figures

  • White Torso, Red Legs, Red Hair Minifigure, checked as a whole figure ×1
  • Red Torso, Blue Legs, Black Hair Minifigure, checked as a whole figure ×1
  • Blue Torso, Red Legs, Brown Hair Minifigure, checked as a whole figure ×1
  • Black Torso, White Legs, Yellow 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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