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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.

Universal Building Set

Checking

744 Universal Building Set

553 pieces in 119 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 139 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 ×4
  • 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 ×2
  • Plate 1 x 6 Black Part 3666 Element 366626 ×1
  • Plate 1 x 8 Black Part 3460 Element 346026 ×4
  • Plate 2 x 10 Black Part 3832 Element 383226 ×4
  • Plate 2 x 2 Black Part 3022 Element 302226 ×5
  • Plate 2 x 3 Black Part 3021 Element 302126 ×4
  • Plate 2 x 4 Black Part 3020 Element 302026 ×6
  • Plate 2 x 6 Black Part 3795 Element 379526 ×5
  • Plate 2 x 8 Black Part 3034 Element 303426 ×6
  • Plate 4 x 6 Black Part 3032 Element 303226 ×1
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×4
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 Also in Yellow ×2
  • Plate 1 x 1 Yellow Part 3024 Element 302424 Also in Trans-Yellow ×8
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×12
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×6
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×7
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×6
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×6
  • Plate 2 x 10 Yellow Part 3832 Element 383224 ×6
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×4
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×4
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×8
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×4
  • Plate 2 x 8 Yellow Part 3034 Element 303424 ×4
  • Plate 4 x 10 Yellow Part 3030 Element 4200024 or 4142103 ×2
  • Plate 4 x 6 Yellow Part 3032 Element 303224 ×2
  • Plate 4 x 8 Yellow Part 3035 Element 303524 ×2
  • Plate 6 x 10 Yellow Part 3033 Element 303324 ×2
  • Plate 6 x 8 Yellow Part 3036 Element 4552333 or 4166761 ×2

Bricks 126 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Dark Blue Part 3065 Element 6514264 or 6244906 ×6
  • Brick 1 x 6 with No Bottom Tubes Trans-Dark Blue Part 3067 ×2
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×12
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×30
  • Brick 1 x 3 Yellow Part 3622 Element 362224 ×12
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×19
  • Brick 1 x 4 with Black 15 Bars Grill Print Yellow Part 3010apr0004 ×2
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×18
  • Brick 1 x 8 Yellow Part 3008 Element 300824 ×16
  • Brick 2 x 2 without Inside Ridges Yellow Part 3003a ×4
  • Brick 2 x 3 without Cross Supports Yellow Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Yellow Part 3001a ×3

Bricks Sloped 62 pieces

  • Brick Sloped 33° 3 x 6 Trans-Dark Blue Part 3939 Element 4114521 or 393943 ×1
  • Brick Sloped 65° 2 x 2 x 2 Smooth without Bottom Tube Trans-Dark Blue Part 3678a ×5
  • Brick Sloped 33° 3 x 2 Yellow Part 3298 Element 329824 ×5
  • Brick Sloped 45° 2 x 1 with Bottom Pin Yellow Part 3040b Element 4121965 or 304024 ×10
  • Brick Sloped 45° 2 x 2 Yellow Part 3039 Element 303924 ×10
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Yellow Part 3747a ×5
  • Brick Sloped Inverted 45° 2 x 1 Yellow Part 3665 Element 366524 ×16
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×10

Technic Special 50 pieces

  • Technic Link Black Part 3711a Element 371126 ×50

Wheels and Tyres 24 pieces

  • Tyre 43 x 17 Black Part 3634 Element 4523564 or 363426 ×8
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×4
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×12

Hinges, Arms and Turntables 19 pieces

  • Hinge Plate 2 x 4 - Female (Digger Bucket Holder) Black Part 3597 Element 4187208 or 359726 ×1
  • Hinge Plate 2 x 4 - Male (Digger Bucket Holder) Black Part 3315 Element 4187207 or 331526 ×1
  • Hinge Plate 2 x 9 with Hole Close to Hinge [Complete Assembly] Black Part 3324ac01 Element 4187212 or 4106945 ×2
  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×1
  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×4
  • Hinge Brick 1 x 2 Top Plate Thin Light Gray Part 3938 Element 393802 ×4
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Hinge Brick 1 x 4 [Lower] Yellow Part 3831 Element 6137916 or 4241119 ×2
  • Hinge Brick 1 x 4 [Upper] Yellow Part 3830 Element 6137910 or 4241117 ×2
  • Turntable 2 x 2 Plate, Base Yellow Part 3680 Element 4667211 or 4597261 ×1

Plates Special 17 pieces

  • Bracket 2 x 2 - 2 x 2 Black Part 3956 Element 6254808 or 6019217 ×4
  • Plate Special 1 x 2 with Handles [Round Ends, Mid Attachment] Black Part 3839a ×2
  • Plate Special 2 x 2 with Towball Black Part 3729 Element 4124111 or 4107856 ×1
  • Plate Special 2 x 2 with Towball Socket, Short, 4 Slots Black Part 3730 Element 373026 ×1
  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thin Open O Clip] Light Gray Part 4085a ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Yellow Part 3794a ×2
  • Technic Plate 2 x 4 [3 Holes] Yellow Part 3709 Element 370924 ×2
  • Technic Plate 2 x 8 [7 Holes] Yellow Part 3738 Element 4624216 or 373824 ×1

Technic Bricks 14 pieces

  • Technic Brick 1 x 12 [11 Pin Holes] Yellow Part 3895 Element 6262393 or 389524 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Yellow Part 3703 Element 370324 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×10

Technic Gears 12 pieces

  • 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 ×2
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×2
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×2
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×4

Tiles 12 pieces

  • Tile 1 x 1 with Groove Yellow Part 3070b Element 307024 ×4
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×8

Bricks Round and Cones 11 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2
  • Brick Round 2 x 2 with Axle Hole Light Gray Part 3941 Element 614302 or 394102 ×5
  • Brick Round 1 x 1 Open Stud Trans-Red Part 3062b Element 6514235 or 6238673 ×2
  • Brick Round 1 x 1 Open Stud Yellow Part 3062b Element 306844 or 306224 ×2

Technic Pins 10 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×8
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×2

Windows and Doors 9 pieces

  • Door 1 x 4 x 5 with 4 Panes, Squared Base Red Part 3861b Element 386121 ×1
  • Window 1 x 2 x 3 Pane Red Part 3854 Element 4175391 or 385421 ×4
  • Window 1 x 4 x 3 Red Part 3853 Element 385321 ×2
  • Door 1 x 4 x 6 Yellow Part 3644 ×2

Bricks Special 8 pieces

  • Brick Special 1 x 1 with Headlight Yellow Part 4070 Element 407024 ×6
  • Brick Special 1 x 1 x 2 with Shutter Holder Yellow Part 3581 Element 4189055 or 358124 ×2

Technic Axles 8 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×3

Technic Bushes 8 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×8

String, Bands and Reels 4 pieces

  • String Cord Thin (0.5mm) [Undetermined Length] Black Part 56823 Element 7009426 ×2
  • String Reel Winch 2 x 4 x 2 (Light Gray Drum) Yellow Part 73037 Element 4109856 ×2

Electronics 3 pieces

  • Battery Box, 4.5V 6 x 11 x 3 1/3 Type 3 [Complete Assembly] Black Part 468c03 ×1
  • Wire with 2-Prong Connectors, 12V / 4.5V 96L Light Gray Part 766c96 Element 73493 ×1
  • Motor, Train, 4.5V 12 x 4 x 3 1/3 Type II Yellow Part upn0259c01 ×1

Minifig Shields, Weapons, & Tools 3 pieces

  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1
  • Tool Pickaxe Dark Gray Part 3841 Element 384127 ×1
  • Weapon Gun / Torch (Space) [with Grooves] Light Gray Part 3959 Element 4254948 or 395952 ×1

Bars, Ladders and Fences 2 pieces

  • Antenna 1 x 4 with Rounded Top Black Part 3957a ×2

Minifig Accessories 2 pieces

  • Equipment Signal Paddle Black Part 3900 Element 6575081 or 4255667 ×2

Panels 2 pieces

  • Panel, Trapezoid, Tipper End Flat with Pins, 1 x 2 Anti-studs Yellow Part 3145 ×2

Plates Round Curved and Dishes 2 pieces

  • Dish 4 x 4 Inverted [Radar] Light Gray Part 3960 Element 4143013 or 396002 ×1
  • Dish 8 x 8 Inverted [Radar], Solid Studs, Rounded Anti-stud Underside Light Gray Part 3961 Element 4118677 or 396102 ×1

Technic Connectors 2 pieces

  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×2

Transportation - Sea and Air 2 pieces

  • Brick Special 1 x 1 with 3 Speakers / Loudspeakers / Space Positioning Rockets Light Gray Part 3963 Element 396302 ×2

Supports, Girders and Cranes 1 piece

  • Hook, Plate 1 x 2 with Crane Hook Left Light Gray Part 3127 Element 312702 ×1

Technic Steering, Suspension and Engine 1 piece

  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×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.

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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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