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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 I

Checking

1090 TECHNIC Control I

397 pieces in 61 part and color combinations.

LEGO counts 406 pieces. This inventory comes from a separate parts catalog and lists 397; 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 251 pieces

  • 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 ×6
  • Plate 1 x 4 Black Part 3710 Element 371026 ×8
  • Plate 1 x 6 Black Part 3666 Element 366626 ×8
  • Plate 1 x 8 Black Part 3460 Element 346026 ×8
  • Plate 2 x 2 Black Part 3022 Element 302226 ×7
  • Plate 2 x 3 Black Part 3021 Element 302126 ×6
  • Plate 2 x 6 Black Part 3795 Element 379526 ×8
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×2
  • Propeller 4 Blade 5 Diameter with Hole for Rotor Holder Black Part 3461 ×4
  • Rubber Band Medium (Square Cross Section) Black Part 71156 Element 71156 ×3
  • Rubber Band Medium (Square Cross Section) Thin Cut Black Part 70012 Element 70012 ×3
  • Sensor, Light, 4.5V Black Part upn0178 ×2
  • Storage / Sorting Tray, Container, Technic Sorting Tray Frame Black Part upn0193 ×1
  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×4
  • Technic Axle 8 Black Part 3707 Element 370726 ×3
  • Technic Link Black Part 3711a Element 371126 ×42
  • Technic Link Tread Black Part 3873 Element 387326 ×94
  • Technic Plate 1 x 6 with Toothed Ends Black Part 4262 Element 4225507 or 4189329 ×8
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×4
  • Technic Plate 2 x 8 [7 Holes] Black Part 3738 Element 373826 ×2
  • Tyre 43 x 17 Black Part 3634 Element 4523564 or 363426 ×4
  • Wheel with Split Axle hole Black Part 3482 Element 4279396 or 4199226 ×4

Light Gray 71 pieces

  • Motor, 4.5V Type 2 for 2-Prong Connectors with Middle Pin Light Gray Part 6216b ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×4
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×10
  • Technic Bush 1/2 Toothed Type I [+ Opening] Light Gray Part 4265a Element 426502 ×6
  • 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 ×4
  • 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 ×8
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×4
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×2
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 ×4
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×8
  • Technic Steering Arm Light Gray Part 4261 Element 4225506 or 4189316 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×2
  • Technic Worm Gear Light Gray Part 4716 Element 471602 ×6
  • Wire with 2-Prong Connectors, 12V / 4.5V 96L Light Gray Part 766c96 Element 73493 ×6

Yellow 71 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Yellow Part 3040b Element 4121965 or 304024 ×6
  • Brick Sloped 45° 2 x 2 Yellow Part 3039 Element 303924 ×5
  • Brick Sloped Inverted 45° 2 x 1 Yellow Part 3665 Element 366524 ×6
  • Hinge Brick 1 x 4 [Lower] Yellow Part 3831 Element 6137916 or 4241119 ×1
  • Hinge Brick 1 x 4 [Upper] Yellow Part 3830 Element 6137910 or 4241117 ×1
  • Light Brick 2 x 2 Type 2 - 4.5V [Complete] Yellow Part 265bc01 ×2
  • Plate 6 x 8 Yellow Part 3036 Element 4552333 or 4166761 ×3
  • Technic Brick 1 x 12 [11 Pin Holes] Yellow Part 3895 Element 6262393 or 389524 ×3
  • Technic Brick 1 x 16 [15 Pin Holes] Yellow Part 3703 Element 370324 ×8
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×12
  • Technic Brick 1 x 4 [3 Pin Holes] Yellow Part 3701 Element 370124 ×7
  • Technic Brick 1 x 6 [5 Pin Holes] Yellow Part 3894 Element 389424 ×6
  • Technic Brick 1 x 8 [7 Pin Holes] Yellow Part 3702 Element 370224 ×4
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×7

White 2 pieces

  • Technic Disc 3 x 3 with 4 Black Sections on One Side and 8 on Reverse Print [Speed Sensor] White Part 2723pr0005 ×2

Blue 1 piece

  • Storage / Sorting Tray, Technic, Fourteen Compartment Blue Part upn0192 ×1

Trans-Clear 1 piece

  • Storage Bin Lid, Technic Trans-Clear Part upn0191 ×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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