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.

Auto Engines

Checking

858 Auto Engines

242 pieces in 46 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

Plates 76 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 ×4
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate 6 x 14 Black Part 3456 Element 345626 ×1
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×24
  • Plate 1 x 8 Blue Part 3460 Element 346023 ×6
  • Plate 2 x 10 Blue Part 3832 Element 383223 ×2
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×2
  • Plate 4 x 10 Blue Part 3030 Element 303073 or 303023 ×2
  • Plate 1 x 1 Light Gray Part 3024 Element 302402 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×4
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×18
  • Plate 1 x 3 Red Part 3623 Element 362321 ×3
  • Plate 2 x 4 Red Part 3020 Element 302021 ×2
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×4

Bricks 31 pieces

  • Brick 1 x 6 Black Part 3009 Element 300926 ×2
  • Brick 1 x 3 Blue Part 3622 Element 362223 ×3
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×18
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×6
  • Brick 1 x 8 Yellow Part 3008 Element 300824 ×2

Technic Axles 19 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×3
  • Technic Axle 2 Black Part 3704 Element 370426 ×6
  • Technic Axle 4 Black Part 3705 Element 370526 ×6
  • Technic Axle 6 Black Part 3706 Element 370626 ×4

Technic Bushes 17 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×17

Technic Connectors 16 pieces

  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×16

Technic Bricks 14 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×1
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×6
  • Technic Brick 1 x 8 [7 Pin Holes] Blue Part 3702 Element 370223 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×5

Tiles 12 pieces

  • Tile 1 x 2 with Groove Blue Part 3069b Element 306923 ×6
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×6

Bricks Sloped 9 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Blue Part 3040b Element 4121936 or 304023 ×2
  • Brick Sloped Inverted 45° 2 x 1 Blue Part 3665 Element 366523 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Yellow Part 3040b Element 4121965 or 304024 ×3

Technic Gears 9 pieces

  • Technic Gear 24 Tooth [Old Style - Three Axle Holes] Light Gray Part 3648a ×8
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×1

Technic Pins 8 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×7

Minifig Accessories 6 pieces

  • Tap 1 x 2 Base with Light Gray Spout Blue Part 69c01 ×6

Plates Special 6 pieces

  • Plate Special 3 x 2 with Rounded End, Hole Light Gray Part 3176 Element 317652 or 317602 ×6

Technic Steering, Suspension and Engine 6 pieces

  • Technic Engine Piston Square 2 x 2 - Old Light Gray Part 3652 Element 365202 ×6

Tubes and Hoses 6 pieces

  • Hose, Classic 4mm D. 12L Black Part upn0258c12 ×6

Plates Round Curved and Dishes 2 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×2

String, Bands and Reels 2 pieces

  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Black Part 85545 ×2

Wheels and Tyres 2 pieces

  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×2

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 with Axle Hole Yellow Part 3941 Element 614324 or 394124 ×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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