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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 I: Simple Machines Set

Checking

1030 TECHNIC I: Simple Machines Set

210 pieces in 67 part and color combinations.

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 Bricks 35 pieces

  • Technic Brick 1 x 12 [11 Pin Holes] Blue Part 3895 Element 389523 ×2
  • 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 ×12
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×12
  • Technic Brick 1 x 6 [5 Pin Holes] Blue Part 3894 Element 389423 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Blue Part 3702 Element 370223 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×1

Hinges, Arms and Turntables 24 pieces

  • Hinge Brick 1 x 2 Base Blue Part 3937 Element 393723 ×4
  • Hinge Brick 1 x 2 Top Plate Thin Blue Part 3938 Element 4279389 or 393823 ×4
  • Turntable 2 x 2 Plate, Base Blue Part 3680 Element 368023 ×8
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×8

Gear Parts 23 pieces

  • Storage / Sorting Tray, Container, Technic Sorting Tray Frame Black Part upn0193 ×1
  • Storage Bin Lid, Technic Trans-Clear Part upn0191 ×1
  • Storage / Sorting Tray, for 1030-1 Yellow Part upn0339 ×1
  • Activity Booklet 1 - Parts Tray Organizer Card - Set 1030 [No Color/Any Color] Part 1030b1 ×1
  • Activity Booklet 10 - Wheels - Set 1030 [No Color/Any Color] Part 1030b10 ×1
  • Activity Booklet 11 - Conveyors - Set 1030 [No Color/Any Color] Part 1030b11 ×1
  • Activity Booklet 12 - Advanced Gearing - Set 1030 [No Color/Any Color] Part 1030b12 ×1
  • Activity Booklet 13 - Pistons - Set 1030 [No Color/Any Color] Part 1030b13 ×1
  • Activity Booklet 14 - Merry-go-round - Set 1030 [No Color/Any Color] Part 1030b14 ×1
  • Activity Booklet 15 - Cranes - Set 1030 [No Color/Any Color] Part 1030b15 ×1
  • Activity Booklet 16 - Lifting with Pulleys - Set 1030 [No Color/Any Color] Part 1030b16 ×1
  • Activity Booklet 17 - Water Wheels - Set 1030 [No Color/Any Color] Part 1030b17 ×1
  • Activity Booklet 18 - Windmills - Set 1030 [No Color/Any Color] Part 1030b18 ×1
  • Activity Booklet 19 - Simple Steering - Set 1030 [No Color/Any Color] Part 1030b19 ×1
  • Activity Booklet 2 - Levers - Set 1030 [No Color/Any Color] Part 1030b2 ×1
  • Activity Booklet 20 - Advanced Steering - Set 1030 [No Color/Any Color] Part 1030b20 ×1
  • Activity Booklet 3 - Supports - Set 1030 [No Color/Any Color] Part 1030b3 ×1
  • Activity Booklet 4 - Lifting & Supporting - Set 1030 [No Color/Any Color] Part 1030b4 ×1
  • Activity Booklet 5 - Pulleys & Belts - Set 1030 [No Color/Any Color] Part 1030b5 ×1
  • Activity Booklet 6 - Gears - Set 1030 [No Color/Any Color] Part 1030b6 ×1
  • Activity Booklet 7 - More Gears - Set 1030 [No Color/Any Color] Part 1030b7 ×1
  • Activity Booklet 8 - Angles - Set 1030 [No Color/Any Color] Part 1030b8 ×1
  • Activity Booklet 9 - Flywheels - Set 1030 [No Color/Any Color] Part 1030b9 ×1

Technic Bushes 20 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×20

Technic Pins 20 pieces

  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×20

Technic Gears 19 pieces

  • Technic Gear 14 Tooth Bevel Light Gray Part 4143 Element 414352 or 414302 ×2
  • Technic Gear 24 Tooth Crown with Flat Teeth Light Gray Part 3650a ×2
  • Technic Gear 24 Tooth [Old Style - Three axle holes] Light Gray Part 3648a ×3
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×2
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×6
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×4

Plates 16 pieces

  • Plate 1 x 3 Red Part 3623 Element 362321 ×4
  • Plate 1 x 4 Red Part 3710 Element 371021 ×4
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 1 x 8 Red Part 3460 Element 346021 ×2
  • Plate 2 x 6 Red Part 3795 Element 379521 ×4

Technic Axles 14 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • 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 ×2

Wheels and Tyres 10 pieces

  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×4
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×2
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×4

Technic Connectors 8 pieces

  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×8

Plates Special 7 pieces

  • Bracket 2 x 2 - 2 x 2 Blue Part 3956 Element 6019215 or 395623 ×1
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×4
  • Technic Plate 2 x 8 [7 Holes] Red Part 3738 Element 373821 ×2

Bricks 5 pieces

  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×4
  • Brick 8 x 16 Green Part 4204 Element 4181116 or 420428 ×1

String, Bands and Reels 5 pieces

  • Rubber Band Large [Square Cross Section] Black Part 70158 ×4
  • String Cord Thin (0.5mm) 75cm Black Part 56823c75 Element 7909 ×1

Technic Steering, Suspension and Engine 3 pieces

  • Technic Engine Piston Square 2 x 2 - Old Light Gray Part 3652 Element 365202 ×1
  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×1
  • Technic Universal Joint 4L [Complete Assembly] Light Gray Part 9244 Element 9244 ×1

Bricks Special 1 piece

  • Brick Special 2 x 6 x 2 Weight with Bottom Openings and Center Seams on Ends Red Part 73090a ×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.