BlockTalk Find Your Set

The Workshop Sheet 10 of 22

LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

Vision Command [RCX Digital Colour Camera]

Checking

9731 Vision Command [RCX Digital Colour Camera]

140 pieces in 41 part and color combinations.

LEGO counts 138 pieces. This inventory comes from a separate parts catalog and lists 140; 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

Technic Pins 40 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×14
  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 ×4
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×12
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 ×2
  • Technic Pin Double with Axle Hole Red Part 32138 Element 4142827 or 4130595 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×2

Technic Beams 24 pieces

  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×2
  • Technic Beam 1 x 6 Thin Black Part 32063 Element 6163980 or 4114634 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×8
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Black Part 32271 Element 6276835 or 4140327 ×4
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×4
  • Technic Beam 3 x 5 L-Shape Thick Black Part 32526 Element 4142823 or 3252626 ×2

Technic Axles 15 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×3
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×6
  • Technic Axle 4 Black Part 3705 Element 370526 ×4
  • Technic Axle 5 Black Part 32073 Element 4114740 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×1

Technic Bushes 14 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×2
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×12

Technic Connectors 13 pieces

  • Technic Axle Connector Ridged [with x Hole x Orientation] Black Part 6538b Element 4113805 or 4107083 ×2
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×4
  • Technic Pin Connector Round [No Slot] Black Part 75535 Element 75619 ×1
  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Gray Part 6538b Element 4113804 or 4100408 ×1
  • Technic Axle and Pin Connector Perpendicular Double Trans-Clear Part 32291 Element 4142883 ×2
  • Technic Modular Connector Trans-Clear Part 32137 Element 4142826 ×3

Technic Gears 7 pieces

  • Technic Ball with 8 Grooves Light Gray Part 2907 Element 290702 ×3
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Red Part 3648b Element 4142825 ×2
  • Technic Worm Gear Rust Part 4716 ×2

Technic Bricks 6 pieces

  • Technic Brick 1 x 12 [11 Pin Holes] Black Part 3895 Element 389526 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges Black Part 32064c ×4

Plates Special 4 pieces

  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×2
  • Technic Plate 2 x 6 [5 Holes] Black Part 32001 Element 3200126 ×2

Tubes and Hoses 4 pieces

  • Hose Rigid 3mm D. 10L / 8.0cm Black Part 75c10 Element 4505034 or 4116941 ×4

Wheels and Tyres 4 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4

Bars, Ladders and Fences 2 pieces

  • Lever Small Base with Black Lever Red Part 298c02 Element 74335 1 spare in the box ×2

Plates 2 pieces

  • Plate 2 x 2 Black Part 3022 Element 302226 ×2

Technic Special 2 pieces

  • Technic Gearbox 2 x 4 x 3 1/3 Trans-Clear Part 6588 Element 6507887 or 6254290 ×2

Electronics 1 piece

  • Camera USB Trans-Dark Blue Part 32561c01 ×1

Gear Parts 1 piece

  • CD-Rom, for 9731 Vision Command Windows 98 (English Language) [No Color/Any Color] Part 4142877 ×1

Non-System Parts 1 piece

  • Colour Test Sheets for Vision Command [No Color/Any Color] Part 4131324 Element 4131324 ×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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