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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.

BuildToExpress Core Set

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45110 BuildToExpress Core Set

193 pieces in 116 part and color combinations, plus 2 minifigures.

LEGO counts 200 pieces. This inventory comes from a separate parts catalog and lists 205, including the 12 parts inside the minifigures; 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

Bricks 45 pieces

  • Brick 1 x 4 Blue Part 3010 Element 301023 ×3
  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×2
  • Brick 2 x 2 Dark Pink Part 3003 Element 4517992 or 4497170 ×2
  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×2
  • Brick 1 x 4 Green Part 3010 Element 4112838 or 301028 ×3
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×2
  • Brick 1 x 2 Lime Part 3004 Element 4613965 or 4164022 ×2
  • Brick 1 x 2 Medium Blue Part 3004 Element 4629786 or 4179833 ×2
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×2
  • Brick 2 x 3 Red Part 3002 Element 300271 or 300221 ×2
  • Brick 1 x 4 Reddish Brown Part 3010 Element 4211225 ×2
  • Brick 2 x 4 Reddish Brown Part 3001 Element 4211201 ×2
  • Brick 1 x 1 x 5 with Blocked Open or Hollow Stud Tan Part 2453a Element 245305 ×4
  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2
  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×2
  • Brick 1 x 1 with Simple Black Eye with White Pupil Print Yellow Part 3005pr0003 Element 4569076 ×3
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×2
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×2
  • Brick 2 x 2 with Eye with White Print on Two Sides, White Circle in Pupil, Offset Yellow Part 3003pr0001 Element 4569077 ×2
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×2

Minifig Accessories 16 pieces

  • Equipment Magnifying Glass with Thick Frame, Solid Handle, Trans-Clear Lens Pattern Black Part 10830pat0001 Element 6012466 ×1
  • Equipment Radio [Extended Handle, Compact Speaker Grille] Black Part 3962b Element 396226 ×2
  • Equipment Hairbrush Short Handle [10mm] Bright Light Orange Part 3852b Element 4243668 ×1
  • Equipment Binoculars Dark Bluish Gray Part 30162 Element 4587887 or 4211051 ×2
  • Equipment Key Dark Bluish Gray Part 62808 ×2
  • Equipment Shovel [Rounded Handle End] Dark Bluish Gray Part 3837 Element 4211006 ×2
  • Bag / Briefcase Reddish Brown Part 4449 Element 6268857 or 4211235 ×1
  • Equipment Brush / Push Broom Reddish Brown Part 3836 Element 4211157 ×1
  • Equipment Goblet / Glass Trans-Clear Part 2343 Element 6166107 or 3000240 ×2
  • Equipment Magic Wand Trans-Neon Green Part 6124 Element 6245511 or 4218642 ×2

Bricks Sloped 12 pieces

  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Dark Bluish Gray Part 4287b ×2
  • Brick Sloped 33° 3 x 2 Orange Part 3298 Element 4121742 ×1
  • Brick Sloped 45° 2 x 1 with Bottom Pin Orange Part 3040b Element 4121967 or 4118901 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Orange Part 3747b Element 4500468 ×1
  • Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×2
  • Brick Sloped 45° 2 x 2 Trans-Dark Blue Part 3039 Element 6514101 or 6244887 ×2
  • Brick Sloped 33° 3 x 1 White Part 4286 Element 6632142 or 428601 ×2

Minifig Headwear 9 pieces

  • Hair Smooth Black Part 3901 Element 390176 or 390126 ×1
  • Hat, Wizard Black Part 6131 Element 4492341 or 4106559 ×1
  • Helmet Castle with Cheek Protection Angled Black Part 48493 Element 6310398 or 4226000 ×1
  • Top Hat Black Part 3878 Element 4569092 or 4105175 ×1
  • Helmet, Standard Blue Part 2446 Element 6013414 or 4569132 ×1
  • Crown Chrome Gold Part 71015 Element 4100457 ×1
  • Hair Mid-Length Tousled with Center Part Dark Brown Part 88283 Element 6648021 or 4568934 ×1
  • Hat / Cap Short Curved Peak Red Part 86035 Element 4562544 ×1
  • Hair Ponytail Reddish Brown Part 6093 Element 4211165 ×1

Plates 8 pieces

  • Plate 1 x 10 Black Part 4477 Element 447726 ×2
  • Plate 2 x 4 Orange Part 3020 Element 4158355 or 4122468 ×2
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate 4 x 8 White Part 3035 Element 6609533 or 303501 ×1
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×1

Wheels and Tyres 8 pieces

  • Tyre Offset Tread with Center Band 23 x 7 Black Part 61254 Element 4541455 ×4
  • Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Light Bluish Gray Part 13971 Element 6359807 or 6044729 ×4

Bricks Special 7 pieces

  • Brick Special 2 x 4 x 2 with Studs on Sides Black Part 2434 Element 4494850 or 4201520 ×1
  • Brick Special 1 x 2 with Pin Dark Bluish Gray Part 2458 Element 4211087 ×2
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×2
  • Brick Special 2 x 2 with Pin and Axle Hole Tan Part 6232 Element 6347700 or 4185273 ×2

Bars, Ladders and Fences 6 pieces

  • Antenna 1 x 4 with Flat Top Black Part 3957b Element 395726 ×1
  • Bar 1 x 3 (Radio Handle, Phone Handset) Dark Bluish Gray Part 6190 Element 4210676 ×2
  • Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Light Bluish Gray Part 6020 Element 4275673 ×1
  • Antenna 1 x 4 with Rounded Top Trans-Neon Green Part 3957a ×2

Hinges, Arms and Turntables 6 pieces

  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×2
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×2
  • Hinge Brick 1 x 2 Base White Part 3937 Element 6619287 or 393701 ×1
  • Hinge Brick 1 x 2 Top Plate Thin White Part 3938 Element 393801 ×1

Minifig Shields, Weapons, & Tools 6 pieces

  • Tool Drill, Electric Black Part 55297 ×1
  • Tool Hammer Cross Pein [6-Rib Handle] Black Part 55295 ×1
  • Tool Oil Can [Smooth Handle] Black Part 55296 ×1
  • Tool Screwdriver with Narrow Head [6-Rib Handle] Black Part 55298 ×1
  • Tool Wrench / Spanner Open End [6-Rib Handle] Black Part 55299 ×1
  • Tool Wrench / Spanner, Box [6-Rib Handle] Black Part 55300 ×1

Bricks Curved 5 pieces

  • Brick Arch 1 x 6 x 3 1/3 Curved Top Black Part 6060 Element 6185955 or 6056500 ×2
  • Brick Arch 1 x 4 Light Bluish Gray Part 3659 Element 4211435 ×3

Plants & Trees 5 pieces

  • Plant, Flower 2 x 2 Leaves - Angular Bright Green Part 4727 Element 4143562 ×2
  • Plant, Bush 2 x 2 x 4 Green Part 6064 Element 6269009 or 606428 ×1
  • Plant, Flower 2 x 2 - Round [Open Stud] Trans-Dark Pink Part 4728 Element 4142898 ×2

Minifig Heads 4 pieces

  • Minifig Head Nya (Samurai X) / Rootbeer Belle, Thin Eyebrows, Eyelashes, White Pupils, Red Lips Smile Print [Hollow Stud] Yellow Part 3626cpr0892 Element 4651442 ×2
  • Minifig Head, Black Eyebrows, Thin Grin, Eyes with White Pupils Print [Hollow Stud] Yellow Part 3626cpr0891 Element 4651441 ×2

Minifig Upper Body 4 pieces

  • Torso, Black Arms, Yellow Hands [Plain] Black Part 973c03h01 Element 6070974 or 4502268 ×1
  • Torso, Blue Arms, Yellow Hands [Plain] Blue Part 973c28h01 Element 4275815 or 73837 ×1
  • Torso, Red Arms, Yellow Hands [Plain] Red Part 973c22h01 Element 4582740 or 4275872 ×1
  • Torso, White Arms, Yellow Hands [Plain] White Part 973c27h01 Element 6038496 or 4275461 ×1

Rock 4 pieces

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Clear Part 30153 Element 6513976 or 6247798 ×1
  • Rock Arctic Globe, Bottom Trans-Light Blue Part 30342 Element 4116927 ×1
  • Rock Arctic Globe, Top Trans-Light Blue Part 30286 Element 4116926 ×1
  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Red Part 30153 Element 6513969 or 6247785 ×1

Technic Connectors 4 pieces

  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° Red Part 32014 Element 6268922 or 4189131 ×2

Technic Pins 4 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4

Transportation - Sea and Air 4 pieces

  • Engine, Smooth Small, 1 x 2 Side Plate with Axle Holders and Slot Black Part 98302 Element 4660876 ×2
  • Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub Black Part 2479 Element 247926 ×2

Bricks Round and Cones 3 pieces

  • Brick Round 4 x 4 Centre Hole Dark Bluish Gray Part 87081 Element 4558959 ×1
  • Brick Round 2 x 2 with Axle Hole Trans-Yellow Part 3941 Element 6514285 or 6273155 ×2

Minifig Lower Body 3 pieces

  • Hips and White Legs White Part 970c27 Element 6551364 or 4570434 ×3

Plates Special 3 pieces

  • Technic Plate 2 x 8 [7 Holes] Black Part 3738 Element 373826 ×1
  • Plate Special 1 x 2 with Ladder Dark Bluish Gray Part 4175 Element 6285244 or 6179567 ×2

String, Bands and Reels 3 pieces

  • Net 10 x 10 Square Black Part 71155 Element 6236969 or 6123960 ×1
  • Chain 16L [21 Links] Dark Bluish Gray Part 60169 Element 6258887 or 4516456 ×2

Flags, Banners and Signs 2 pieces

  • Flag 4 x 1 Wavy [First Wave Right] Green Part 4495b Element 6268947 or 449528 ×2

Technic Axles 2 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×2

Technic Beams 2 pieces

  • Technic Beam 2 x 4 L-Shape Thick Lime Part 32140 Element 6271826 or 4140345 ×2

Technic Bricks 2 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×2

Technic Gears 2 pieces

  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×2

Tiles 2 pieces

  • Tile 1 x 2 with '100' Banknote Print Green Part 3069bpr0100 Element 4295260 or 82317 ×1
  • Tile 2 x 2 with Map River, Dark Tan Mountains, Handwriting and Red X Print Tan Part 3068bpr0139 Element 4524449 ×1

Tiles Special 2 pieces

  • Tile Special 2 x 2 with Top Pin Dark Bluish Gray Part 2460 Element 4211129 ×2

Transportation - Land 2 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel Light Bluish Gray Part 3829c01 Element 4226995 ×1
  • Steering Wheel Small, 2 x 2 Light Bluish Gray Part 30663 Element 30663194 or 4211701 ×1

Tubes and Hoses 2 pieces

  • Flexible Hose 8.5L with Tabless Ends (Fixed Ends same color as Tube) Black Part 73590c03a Element 6327402 or 6288582 ×1
  • Axle Hose, Soft 12L White Part 32200 Element 4296264 or 4227522 ×1

Baseplates 1 piece

  • Baseplate 16 x 32 Dark Bluish Gray Part 3857 Element 4269651 ×1

Minifig Headwear Accessories 1 piece

  • Headwear Accessory Visor / Diver's Mask Trans-Light Blue Part 30090 Element 6244761 or 4569133 ×1

Minifig Neckwear 1 piece

  • Minifig Neckwear Backpack Non-Opening White Part 2524 Element 6268827 or 4598712 ×1

Panels 1 piece

  • Panel 3 x 4 x 6 with Arched Window Black Part 30246 Element 4271754 or 3024626 ×1

Plates Wedged 1 piece

  • Wedge Plate 3 x 6 Cut Corners Green Part 2419 Element 241928 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 2 x 4 x 2 Trans-Clear Part 3823 Element 6581801 or 6253681 ×1

Minifigures 2 figures

  • Skeleton, Standard Face, Ball Joint Arms (3626b Head) Minifigure, checked as a whole figure ×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.

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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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