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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.

Serious Play Module 1

Checking

3357 Serious Play Module 1

2,219 pieces in 127 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

Black 390 pieces

  • Antenna 1 x 4 with Flat Top Black Part 3957b Element 395726 ×10
  • Brick Arch 1 x 6 x 3 1/3 Curved Top Black Part 6060 Element 6185955 or 6056500 ×40
  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×20
  • Brick Special 2 x 4 x 2 with Studs on Sides Black Part 2434 Element 4494850 or 4201520 ×10
  • Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders] Black Part 3475b Element 347526 ×20
  • Equipment Whip [aka Plant Vine] Black Part 2488 Element 6268824 or 4161403 ×20
  • Hair Center Parting Black Part 4530 Element 4659663 or 453026 ×10
  • Hips and Black Legs Black Part 970c03 Element 4569093 or 73407 ×10
  • Panel 3 x 4 x 6 with Arched Window Black Part 30246 Element 4271754 or 3024626 ×10
  • Plate 1 x 10 Black Part 4477 Element 447726 ×20
  • Plate Special 2 x 2 with Towball Black Part 3729 Element 4124111 or 4107856 ×20
  • Plate Special 2 x 2 with Towball Socket, Short, Flattened with Holes and Axle Hole in Center Black Part 63082 Element 6273226 or 4529064 ×20
  • Plate Special Round 8 x 8 with 2 x 2 Center Studs with Groove Black Part 6177b Element 4205860 or 617726 ×10
  • Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub Black Part 2479 Element 247926 ×10
  • String with End Studs 41L Overall Black Part 14226c41 Element 6096957 or 6074034 ×10
  • Technic Axle 12 Black Part 3708 Element 370826 ×20
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×20
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×20
  • Technic Plate 2 x 8 [7 Holes] Black Part 3738 Element 373826 ×20
  • Top Hat Black Part 3878 Element 4569092 or 4105175 ×10
  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×20
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×40

Light Bluish Gray 230 pieces

  • Brick Arch 1 x 4 Light Bluish Gray Part 3659 Element 4211435 ×20
  • Brick Special 2 x 4 with Pins Light Bluish Gray Part 6249 Element 6356158 or 4211676 ×20
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Light Bluish Gray Part 44302a Element 4211804 ×40
  • Hinge Tile 1 x 3 Locking with 1 Finger on Top Light Bluish Gray Part 44300 Element 4211802 ×40
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Bluish Gray Part 4019 Element 4562487 or 4211563 ×20
  • Technic Gear 40 Tooth Light Bluish Gray Part 3649 Element 6195314 or 4285634 ×10
  • Technic Link 1 x 16 Light Bluish Gray Part 2637 Element 4211556 ×20
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×20
  • Wheel 18 x 8 with Fake Bolts and Shallow Spokes Light Bluish Gray Part 56902 Element 4499259 ×40

Yellow 193 pieces

  • Brick 1 x 1 with Simple Black Eye with White Pupil Print Yellow Part 3005pr0003 Element 4569076 ×20
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×20
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×40
  • Brick 2 x 2 with Eye with White Print on Two Sides, White Circle in Pupil, Offset Yellow Part 3003pr0001 Element 4569077 ×10
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×20
  • Brick 2 x 4 with Smile and Frown Print on Opposite Sides Yellow Part 3001pr0043 Element 80141 ×10
  • Brick Curved 2 x 3 Yellow Part 6215 Element 621524 ×20
  • Duplo Brick 2 x 2 x 2 Yellow Part 31110 Element 4566620 or 4107911 ×2
  • Minifig Head, Brown Eyebrows, Thin Grin, Black Eyes with White Pupils Print Yellow Part 3626bpr0387 Element 6045809 or 4631520 ×20
  • Plate 2 x 16 Yellow Part 4282 Element 6207377 or 428224 ×1
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×20
  • Support 2 x 2 x 11 Solid Pillar Yellow Part 75347 Element 4263653 ×10

Green 162 pieces

  • Brick 1 x 1 with Simple Eye Black and White Print Green Part 3005pr9996 Element 4107722 ×20
  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×20
  • Brick 1 x 4 Green Part 3010 Element 4112838 or 301028 ×20
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×40
  • Brick 8 x 8 Green Part 4201 Element 4181132 or 420128 ×2
  • Brick Curved 2 x 3 Green Part 6215 Element 621528 ×20
  • Flag 4 x 1 Wavy [First Wave Right] Green Part 4495b Element 6268947 or 449528 ×10
  • Plant, Bush 2 x 2 x 4 Green Part 6064 Element 6269009 or 606428 ×10
  • Wedge Plate 3 x 6 Cut Corners Green Part 2419 Element 241928 ×20

Dark Bluish Gray 140 pieces

  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×20
  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Dark Bluish Gray Part 4287b ×20
  • Brick Sloped Inverted 45° 6 x 4 Double with 4 x 4 Recessed and 3 Holes Dark Bluish Gray Part 60219 Element 4549999 ×10
  • Brick Special 1 x 2 with Pin Dark Bluish Gray Part 2458 Element 4211087 ×20
  • Plate Special 1 x 2 with 4 x 4 disk at 90 degrees Dark Bluish Gray Part 30209 Element 4211112 ×10
  • Plate Special 1 x 2 with Ladder Dark Bluish Gray Part 4175 Element 6285244 or 6179567 ×10
  • Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole Dark Bluish Gray Part 3940b Element 4211110 ×20
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×10
  • Tile Special 2 x 2 with Top Pin Dark Bluish Gray Part 2460 Element 4211129 ×20

Orange 140 pieces

  • Brick 2 x 4 Orange Part 3001 Element 4153827 or 4119641 ×80
  • Brick Sloped 33° 3 x 2 Orange Part 3298 Element 4121742 ×10
  • Brick Sloped 45° 2 x 1 with Bottom Pin Orange Part 3040b Element 4121967 or 4118901 ×20
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Orange Part 3747a Element 4121737 ×10
  • Plate 2 x 3 Orange Part 3021 Element 4125278 ×10
  • Plate 2 x 4 Orange Part 3020 Element 4158355 or 4122468 ×10

Red 140 pieces

  • Brick 2 x 4 Red Part 3001 Element 300121 ×40
  • Hat / Cap Long Peak [Plain] Red Part 4485 Element 448521 ×10
  • Hinge Brick 1 x 2 Base Red Part 3937 Element 393721 ×20
  • Hinge Brick 2 x 2 Top Plate Thin Red Part 6134 Element 613421 ×10
  • Hose, Ribbed 7mm D. 14L / 11.2cm Red Part 78c14 Element 4268654 or 4125203 ×10
  • Plate 2 x 3 Red Part 3021 Element 302121 ×10
  • Plate 2 x 4 Red Part 3020 Element 302021 ×10
  • Technic Axle and Pin Connector Angled #6 - 90° Red Part 32014 Element 6268922 or 4189131 ×20
  • Window 2 x 4 x 3 Frame with Hollow Studs Red Part 60598 Element 4528164 ×10

Tan 140 pieces

  • Brick 1 x 1 x 5 with Solid Stud Tan Part 2453b Element 4112980 ×40
  • Brick 2 x 8 Tan Part 3007 Element 6037398 or 4141533 ×20
  • Brick Special 2 x 2 with Pin and Axle Hole Tan Part 6232 Element 6347700 or 4185273 ×20
  • Plate 1 x 10 Tan Part 4477 Element 4143409 or 447705 ×20
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×40

White 120 pieces

  • Axle Hose, Soft 12L White Part 32200 Element 4296264 or 4227522 ×10
  • Brick Sloped 33° 3 x 1 White Part 4286 Element 6632142 or 428601 ×20
  • Hinge Brick 1 x 2 Base White Part 3937 Element 6619287 or 393701 ×10
  • Hinge Brick 1 x 2 Top Plate Thin White Part 3938 Element 393801 ×10
  • Hips and White Legs White Part 970c27 Element 6551364 or 4570434 ×10
  • Ladder 14 x 2.5 White Part 4207 Element 420751 or 420701 ×10
  • Minifig Head Skeleton, Standard Skull Print White Part 3626bpr0895 Element 6008095 or 82359 ×10
  • Wedge Plate 4 x 9 without Stud Notches White Part 2413 Element 241351 or 241301 ×20
  • Window 1 x 2 x 3 Pane with Thick Corner Tabs White Part 60608 Element 6171058 or 4520842 ×20

Lime 90 pieces

  • Brick 1 x 2 Lime Part 3004 Element 4613965 or 4164022 ×20
  • Brick Round 1 x 1 Open Stud Lime Part 3062b Element 4212454 ×40
  • Technic Beam 1 x 11 Thick Lime Part 32525 Element 6293920 or 4534911 ×10
  • Technic Beam 2 x 4 L-Shape Thick Lime Part 32140 Element 6271826 or 4140345 ×20

Blue 80 pieces

  • Brick 1 x 4 Blue Part 3010 Element 301023 ×20
  • Helmet, Standard Blue Part 2446 Element 6013414 or 4569132 ×10
  • Plate 2 x 12 Blue Part 2445 Element 244523 ×10
  • Technic Beam 1 x 11.5 Double Bent Thick Blue Part 32009 Element 6271153 or 4112000 ×20
  • Torso, Blue Arms, Yellow Hands [Plain] Blue Part 973c28h01 Element 4275815 or 73837 ×10
  • Torso, White Arms, Yellow Hands [Plain] Blue Part 973c27h01 Element 4275813 ×10

Chrome Gold 50 pieces

  • Crown Chrome Gold Part 71015 Element 4100457 ×10
  • Money / Coin with "10" Sans-serif Type Chrome Gold Part 57503 ×10
  • Money / Coin with "20" Sans-serif Type Chrome Gold Part 57504 ×10
  • Money / Coin with "30" Sans-serif Type Chrome Gold Part 57505 ×10
  • Money / Coin with "40" Sans-serif Type Chrome Gold Part 57506 ×10

Reddish Brown 50 pieces

  • Brick 1 x 4 Reddish Brown Part 3010 Element 4211225 ×20
  • Brick 2 x 4 Reddish Brown Part 3001 Element 4211201 ×10
  • Plate 4 x 6 Reddish Brown Part 3032 Element 4271874 or 4211213 ×20

Trans-Clear 50 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×20
  • Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×20
  • Windscreen 2 x 4 x 2 Trans-Clear Part 3823 Element 6581801 or 6253681 ×10

Trans-Light Blue 42 pieces

  • Dish 4 x 4 Inverted [Radar] Trans-Light Blue Part 3960 Element 4293877 ×10
  • Duplo Brick 2 x 4 Trans-Light Blue Part 3011 Element 6507904 or 6202108 ×2
  • Rock Arctic Globe, Bottom Trans-Light Blue Part 30342 Element 4116927 ×10
  • Rock Arctic Globe, Top Trans-Light Blue Part 30286 Element 4116926 ×10
  • Windscreen 2 x 4 x 2 Trans-Light Blue Part 3823 Element 6581802 or 6253682 ×10

Trans-Dark Blue 40 pieces

  • Brick 2 x 2 without Inside Ridges Trans-Dark Blue Part 6223 Element 6514091 or 6238043 ×40

Trans-Red 40 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×20
  • Brick 2 x 2 without Inside Ridges Trans-Red Part 6223 Element 6514092 or 6239416 ×20

Bright Green 20 pieces

  • Plant, Flower 2 x 2 Leaves - Angular Bright Green Part 4727 Element 4143562 ×20

Medium Blue 20 pieces

  • Brick 1 x 2 Medium Blue Part 3004 Element 4629786 or 4179833 ×20

Trans-Dark Pink 20 pieces

  • Plant, Flower 2 x 2 - Round [Open Stud] Trans-Dark Pink Part 4728 Element 4142898 ×20

Trans-Green 20 pieces

  • Brick 2 x 2 without Inside Ridges Trans-Green Part 6223 Element 6514090 or 6219774 ×20

Trans-Yellow 20 pieces

  • Brick Round 2 x 2 with Axle Hole Trans-Yellow Part 3941 Element 6514285 or 6273155 ×20

Pearl Light Gray 10 pieces

  • Hose, Ribbed 7mm D. 9L / 7.2cm Pearl Light Gray Part 78c09 Element 4495206 or 4141671 ×10

Trans-Neon Green 10 pieces

  • Antenna 1 x 4 with Flat Top Trans-Neon Green Part 3957b Element 6168725 or 4114011 ×10

Bright Pink 2 pieces

  • Duplo Brick 2 x 2 Bright Pink Part 3437 Element 4654353 or 4223919 ×2

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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