BlockTalk Find Your Set

Free tool

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.

Lego Minifigure

Checking

3723 Lego Minifigure

1,850 pieces in 92 part and color combinations.

LEGO counts 1,849 pieces. This inventory comes from a separate parts catalog and lists 1,850; 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.

Show

Piece checklist

Red 573 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×16
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×16
  • Brick 1 x 3 Red Part 3622 Element 362221 ×12
  • Brick 1 x 4 Red Part 3010 Element 301021 ×11
  • Brick 1 x 6 Red Part 3009 Element 300921 ×8
  • Brick 1 x 8 Red Part 3008 Element 300821 ×9
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×6
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×6
  • Brick 2 x 2 Corner Red Part 2357 Element 235771 or 235721 ×14
  • Brick 2 x 3 Red Part 3002 Element 300271 or 300221 ×14
  • Brick 2 x 4 Red Part 3001 Element 300121 ×26
  • Brick 2 x 6 Red Part 2456 Element 4181138 or 245621 ×23
  • Brick 2 x 8 Red Part 3007 Element 6036408 or 300721 ×13
  • Plate 1 x 1 Red Part 3024 Element 302421 ×36
  • Plate 1 x 2 Red Part 3023 Element 302321 ×34
  • Plate 1 x 3 Red Part 3623 Element 362321 ×22
  • Plate 1 x 4 Red Part 3710 Element 371021 ×26
  • Plate 1 x 6 Red Part 3666 Element 366621 ×16
  • Plate 1 x 8 Red Part 3460 Element 346021 ×4
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×16
  • Plate 2 x 2 Corner Red Part 2420 Element 242071 or 242021 ×54
  • Plate 2 x 3 Red Part 3021 Element 302121 ×46
  • Plate 2 x 4 Red Part 3020 Element 302021 ×54
  • Plate 2 x 6 Red Part 3795 Element 379521 ×50
  • Plate 2 x 8 Red Part 3034 Element 303421 ×16
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×4
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×18
  • Turntable 4 x 4 Square Base with Top, Complete Assembly Red Part 3403c01 Element 4221665 or 4143678 ×1

Yellow 568 pieces

  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×10
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×2
  • Brick 1 x 3 Yellow Part 3622 Element 362224 ×6
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×14
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×7
  • Brick 1 x 8 Yellow Part 3008 Element 300824 ×8
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×3
  • Brick 2 x 2 Corner Yellow Part 2357 Element 235774 or 235724 ×36
  • Brick 2 x 3 Yellow Part 3002 Element 300224 ×25
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×18
  • Brick 2 x 6 Yellow Part 2456 Element 4181143 or 245624 ×9
  • Brick 2 x 8 Yellow Part 3007 Element 4639693 or 300724 ×8
  • Plate 1 x 1 Yellow Part 3024 Element 302424 ×28
  • Plate 1 x 10 Yellow Part 4477 Element 6079138 or 6078095 ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×34
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×38
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×30
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×23
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×12
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×22
  • Plate 2 x 2 Corner Yellow Part 2420 Element 242074 or 242024 ×132
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×16
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×50
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×19
  • Plate 2 x 8 Yellow Part 3034 Element 303424 ×8
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×4
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges Yellow Part 32064c ×4

Blue 347 pieces

  • Brick 1 x 10 Blue Part 6111 Element 6057905 or 4497172 ×4
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×8
  • Brick 1 x 3 Blue Part 3622 Element 362223 ×4
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×14
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×2
  • Brick 1 x 8 Blue Part 3008 Element 300823 ×6
  • Brick 2 x 10 Blue Part 3006 Element 4615600 or 300623 ×42
  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×10
  • Brick 2 x 2 Corner Blue Part 2357 Element 4558606 or 4533323 ×26
  • Brick 2 x 3 Blue Part 3002 Element 300223 ×56
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×56
  • Brick 2 x 6 Blue Part 2456 Element 4181139 or 245623 ×81
  • Brick 2 x 8 Blue Part 3007 Element 6037384 or 300723 ×38

Green 335 pieces

  • Baseplate 16 x 32 Green Part 3857 Element 4219615 or 274828 ×1
  • Plate 1 x 1 Green Part 3024 Element 302428 ×16
  • Plate 1 x 2 Green Part 3023 Element 302328 ×70
  • Plate 1 x 3 Green Part 3623 Element 4107758 or 362328 ×12
  • Plate 1 x 4 Green Part 3710 Element 371028 ×65
  • Plate 1 x 6 Green Part 3666 Element 366628 ×31
  • Plate 1 x 8 Green Part 3460 Element 346028 ×26
  • Plate 2 x 2 Green Part 3022 Element 302228 ×20
  • Plate 2 x 3 Green Part 3021 Element 302128 ×24
  • Plate 2 x 4 Green Part 3020 Element 302028 ×36
  • Plate 2 x 6 Green Part 3795 Element 379528 ×9
  • Plate 2 x 8 Green Part 3034 Element 303428 ×25

Black 12 pieces

  • Dish 2 x 2 Inverted [Radar] Black Part 4740 Element 474026 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×4
  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1

Light Gray 12 pieces

  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 1 spare in the box ×2
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×6
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×4

Dark Gray 2 pieces

  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 3723-1 [No Color/Any Color] Part 41096 Element 4155159 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy