BlockTalk Find Your Set

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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

733 Universal Building Set

504 pieces in 140 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

Bricks 147 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×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 ×4
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×6
  • Brick 1 x 8 Blue Part 3008 Element 300823 ×4
  • Brick 2 x 2 without Inside Ridges Blue Part 3003a ×2
  • Brick 2 x 3 without Cross Supports Blue Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Blue Part 3001a ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×16
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×23
  • Brick 1 x 3 Red Part 3622 Element 362221 ×8
  • Brick 1 x 4 Red Part 3010 Element 301021 ×21
  • Brick 1 x 6 Red Part 3009 Element 300921 ×18
  • Brick 1 x 8 Red Part 3008 Element 300821 ×14
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×2
  • Brick 2 x 3 without Cross Supports Red Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×2
  • Brick 1 x 2 Trans-Clear Part 3004 Element 4256587 or 300410 ×4
  • Brick 1 x 4 Trans-Clear Part 3010 Element 4256588 or 4227529 ×2

Bricks Sloped 110 pieces

  • Brick Sloped 33° 3 x 2 Blue Part 3298 Element 6294307 or 6141996 ×3
  • Brick Sloped 45° 2 x 1 Double / Inverted with Hollow Bottom Blue Part 3049c ×2
  • Brick Sloped 45° 2 x 1 Double without Bottom Pin Blue Part 3044a ×2
  • Brick Sloped 45° 2 x 1 Triple with Hollow Underside Blue Part 3048a ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Blue Part 3040b Element 4121936 or 304023 ×4
  • Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×8
  • Brick Sloped 45° 2 x 2 Double Blue Part 3043 Element 4560573 or 4280124 ×2
  • Brick Sloped 45° 2 x 2 Double Concave Blue Part 3046a Element 6088710 or 4626370 ×8
  • Brick Sloped 45° 2 x 2 Double Convex Blue Part 3045 Element 6439889 or 6234158 ×8
  • Brick Sloped 45° 2 x 3 Blue Part 3038 Element 4580925 or 4112233 ×4
  • Brick Sloped 45° 2 x 3 Double Blue Part 3042 ×1
  • Brick Sloped 45° 2 x 4 Blue Part 3037 Element 4107437 or 303723 ×16
  • Brick Sloped 45° 2 x 4 Double Blue Part 3041 Element 4240172 or 304123 ×3
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Blue Part 3747a Element 4500460 or 374723 ×3
  • Brick Sloped Inverted 45° 2 x 1 Blue Part 3665 Element 366523 ×10
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Blue Part 3660 Element 366023 ×12
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×4
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×8
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×2
  • Brick Sloped 33° 3 x 6 Trans-Clear Part 3939 Element 4190513 or 4124070 ×1
  • Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×3
  • Brick Sloped 65° 2 x 2 x 2 Smooth without Bottom Tube Trans-Clear Part 3678a Element 4190879 or 367840 ×4

Plates 97 pieces

  • Plate 1 x 1 Blue Part 3024 Element 302423 1 spare in the box ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×5
  • Plate 1 x 3 Blue Part 3623 Element 362323 ×4
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×4
  • Plate 1 x 6 Blue Part 3666 Element 366623 ×4
  • Plate 1 x 8 Blue Part 3460 Element 346023 ×4
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×4
  • Plate 2 x 3 Blue Part 3021 Element 302123 ×2
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×4
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×4
  • Plate 2 x 8 Blue Part 3034 Element 303423 ×2
  • Plate 4 x 12 Blue Part 3029 Element 4528850 or 4166870 ×1
  • Plate 4 x 6 Blue Part 3032 Element 303223 ×1
  • Plate 4 x 8 Blue Part 3035 Element 303523 ×2
  • Plate 6 x 8 Blue Part 3036 Element 303673 or 303623 ×2
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×4
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×4
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×5
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×4
  • Plate 1 x 2 Red Part 3023 Element 302321 ×4
  • Plate 1 x 3 Red Part 3623 Element 362321 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 1 x 8 Red Part 3460 Element 346021 ×4
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×2
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×4
  • Plate 2 x 6 Red Part 3795 Element 379521 ×2
  • Plate 2 x 8 Red Part 3034 Element 303421 ×2
  • Plate 4 x 6 Red Part 3032 Element 303221 ×1
  • Plate 6 x 8 Red Part 3036 Element 303671 or 303621 ×2
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 1 spare in the box ×4

Wheels and Tyres 26 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×10
  • Plate Special 2 x 2 with Wheels Red Light Gray Part 122c01 ×2
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×10

Windows and Doors 23 pieces

  • Door 1 x 3 x 1 Left Blue Part 3822 Element 4586544 or 382223 ×1
  • Door 1 x 3 x 1 Right Blue Part 3821 Element 4586547 or 4141585 ×1
  • Door 1 x 3 x 2 Left Blue Part 3189 Element 318923 ×1
  • Door 1 x 3 x 2 Right Blue Part 3188 Element 4108203 or 318823 ×1
  • Door 1 x 4 x 6 Blue Part 3644 Element 4163375 ×2
  • Window 1 x 2 x 3 Shutter Blue Part 3856 Element 385623 ×4
  • Window 1 x 4 x 3 Blue Part 3853 Element 385323 ×4
  • Door 1 x 4 x 5 with 4 Panes, Squared Base White Part 3861b Element 4160992 or 386101 ×1
  • Window 1 x 2 x 3 Pane White Part 3854 Element 385401 ×8

Hinges, Arms and Turntables 14 pieces

  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×1
  • Turntable 2 x 2 Plate, Base Blue Part 3680 Element 368023 ×1
  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×2
  • Hinge Brick 1 x 2 Top Plate Thin Light Gray Part 3938 Element 393802 ×2
  • Hinge Plate 2 x 4 - Female (Digger Bucket Holder) Light Gray Part 3597 Element 359702 ×1
  • Hinge Plate 2 x 4 - Male (Digger Bucket Holder) Light Gray Part 3315 Element 331502 ×1
  • Hinge Plate 2 x 9 with Hole Close to Hinge [Complete Assembly] Light Gray Part 3324ac01 Element 4106906 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Hinge Brick 1 x 4 [Lower] Red Part 3831 Element 6512257 or 6397573 ×2
  • Hinge Brick 1 x 4 [Upper] Red Part 3830 Element 6397607 or 6011464 ×2

Plates Special 12 pieces

  • Bracket 2 x 2 - 2 x 2 Light Gray Part 3956 Element 395602 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thin Open O Clip] Light Gray Part 4085a ×2
  • Plate Special 1 x 2 with Handles [Round Ends, Mid Attachment] Light Gray Part 3839a ×2
  • Plate Special 2 x 2 with Towball Light Gray Part 3729 Element 372902 ×1
  • Plate Special 2 x 2 with Towball Socket, Short, 4 Slots Light Gray Part 3730 Element 373002 ×1
  • Plate Special 2 x 5 with Towball Socket Light Gray Part 3491 ×1
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×2
  • Technic Plate 2 x 8 [7 Holes] Red Part 3738 Element 373821 ×1

Technic Bricks 10 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×10

Tiles 10 pieces

  • Tile 1 x 1 with Groove Blue Part 3070b Element 4206330 or 307073 1 spare in the box ×2
  • Tile 1 x 2 with Groove Blue Part 3069b Element 306923 ×4
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×4

Bricks Round and Cones 8 pieces

  • Brick Round 1 x 1 Open Stud Light Gray Part 3062b Element 306202 ×4
  • Brick Round 2 x 2 with Axle Hole Light Gray Part 3941 Element 614302 or 394102 ×2
  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2

Technic Axles 7 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×5

Technic Pins 7 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×6
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×1

Transportation - Sea and Air 6 pieces

  • Plate Special 2 x 2 with Helicopter Tail Rotor Holder Blue Part 3481 ×1
  • Plate Special 2 x 3 with Helicopter Rotor Holder Blue Part 3462 ×1
  • Brick Special 1 x 1 with 3 Speakers / Loudspeakers / Space Positioning Rockets Light Gray Part 3963 Element 396302 ×2
  • Propeller 4 Blade 5 Diameter with Hole for Rotor Holder Light Gray Part 3461 ×2

Transportation - Land 5 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel Blue Part 3829c01 Element 9566 ×1
  • Vehicle Track, Train, Slotted Rail Straight Light Gray Part 3228b Element 322802 ×4

Bricks Special 4 pieces

  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×2
  • Brick Special 1 x 1 x 2 with Shutter Holder Red Part 3581 Element 4207299 or 358121 ×2

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) Blue Part 73037 ×2

Minifig Shields, Weapons, & Tools 2 pieces

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

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

Supports, Girders and Cranes 2 pieces

  • Hook, Plate 1 x 2 with Crane Hook Left Light Gray Part 3127 Element 312702 ×1
  • Crane Bucket [Complete Assembly] Yellow Part 3492c01 Element 6021197 or 4614755 ×1

Technic Bushes 2 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×2

Technic Gears 2 pieces

  • Technic Gear 24 Tooth Crown with Flat Teeth Light Gray Part 3650a ×1
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×1

Bars, Ladders and Fences 1 piece

  • Antenna 1 x 4 with Rounded Top Light Gray Part 3957a Element 395702 ×1

Baseplates 1 piece

  • Baseplate 32 x 32 Green Part 3811 Element 4219692 or 381128 ×1

Minifig Accessories 1 piece

  • Equipment Radio [Compact Handle] Black Part 3962a ×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.

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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