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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

400 Universal Building Set

306 pieces in 91 part and color combinations, plus 3 minifigures.

LEGO counts 294 pieces. This inventory comes from a separate parts catalog and lists 318, 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

Red 146 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×18
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×21
  • Brick 1 x 4 Red Part 3010 Element 301021 ×10
  • Brick 1 x 4 with Chrome Silver Car Grill Print [Embossed] Red Part 3010apr0003 ×1
  • Brick 1 x 6 Red Part 3009 Element 300921 ×12
  • Brick 1 x 8 Red Part 3008 Element 300821 ×12
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×2
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×4
  • Brick 2 x 3 without Cross Supports Red Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×2
  • Brick 2 x 8 Red Part 3007 Element 6036408 or 300721 ×2
  • Brick Arch 1 x 4 Red Part 3659 Element 365921 ×4
  • Brick Arch 1 x 8 x 2 Red Part 3308 Element 6019621 or 4249187 ×2
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch Red Part 3063b Element 306321 ×4
  • Brick Sloped 45° 2 x 1 without Bottom Pin Red Part 3040a ×2
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×8
  • Brick Special 1 x 1 x 2 with Shutter Holder Red Part 3581 Element 4207299 or 358121 ×4
  • Door Frame 1 x 3 x 4 Red Part 3579 ×2
  • Hinge Plate 2 x 5 with Large Hole [Complete Assembly] Red Part 3149bc01 Element 4188477 or 4106942 ×2
  • Hook, Plate 1 x 2 with Crane Hook Right Red Part 3127b ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 ×5
  • Plate 1 x 2 Red Part 3023 Element 302321 ×2
  • 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 ×2
  • Plate 4 x 10 Red Part 3030 Element 4535164 or 4188302 ×1
  • Plate Special 1 x 4 with Towball Red Part 3184 Element 318421 ×1
  • Plate Special 1 x 4 with Towball Socket, Long, 2 Slots Red Part 3183a ×1
  • Plate Special 2 x 2 with Helicopter Tail Rotor Holder Red Part 3481 ×2
  • String Reel Winch 4 x 4 x 2 with Metal Handle, Red Drum Red Part 586c01 ×1
  • Wheel Centre Small with Stub Axles (Pulley Wheel) Red Part 3464 Element 4180583 or 346421 ×4
  • Wheel Spoked with Stud Red Part 242c01 ×4

Blue 99 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×4
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×4
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×4
  • Brick 1 x 4 with Chrome Silver Car Grill Print [Embossed] Blue Part 3010apr0003 ×1
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×4
  • Brick 1 x 8 Blue Part 3008 Element 300823 ×4
  • Brick 2 x 2 without Inside Ridges Blue Part 3003a ×2
  • Brick 2 x 4 without Cross Supports Blue Part 3001a ×2
  • Brick Sloped 33° 2 x 2 Double Blue Part 3300 Element 330023 ×2
  • Brick Sloped 33° 2 x 4 Double Blue Part 3299 Element 329923 ×4
  • Brick Sloped 33° 3 x 2 Blue Part 3298 Element 6294307 or 6141996 ×8
  • Brick Sloped 33° 3 x 4 Blue Part 3297 Element 6088711 or 329723 ×16
  • Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×2
  • Brick Sloped 45° 2 x 4 Blue Part 3037 Element 4107437 or 303723 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Blue Part 3660 Element 366023 ×2
  • Fence Lattice 1 x 4 x 1 Blue Part 3633 Element 4106807 or 363323 ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×2
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2
  • Plate 2 x 3 Blue Part 3021 Element 302123 ×2
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×2
  • Plate 2 x 8 Blue Part 3034 Element 303423 ×4
  • Plate 4 x 10 Blue Part 3030 Element 303073 or 303023 ×1
  • Plate 4 x 12 Blue Part 3029 Element 4528850 or 4166870 ×2
  • 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 ×1
  • Plate Special 1 x 4 with Towball Blue Part 3184 ×1
  • Plate Special 1 x 4 with Towball Socket, Long, 2 Slots Blue Part 3183a ×1
  • Plate Special 2 x 2 with Wheel Holder Bottom Blue Part 8 ×4
  • Tail Old Blue Part 3587 ×1
  • Vehicle Track, Train, Tapered Rail Straight 16L Blue Part 3228a ×2
  • Window 1 x 2 x 2 Shutter Blue Part 3582 Element 358223 ×4

Black 26 pieces

  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×2
  • Brick Special 2 x 2 [Red Wheels for Single Tyre] Black Part 3137c01 ×4
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Red Inside Black Part 7049bc01 ×2
  • Forklift Mast and Carriage 2 x 2 Plate and Yellow Fork [Complete Assembly] Black Part 3430c02 ×1
  • String Cord Thin (0.5mm) [Undetermined Length] Black Part 56823 Element 7009426 ×1
  • Tyre 14 x 4 Smooth Small Single Black Part 3139 Element 313926 ×4
  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×8
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×4

Yellow 21 pieces

  • Brick Round 1 x 1 Solid Stud Yellow Part 3062a ×4
  • Door 1 x 2 x 3 Right, Hollow Studs, Fixed Glass Yellow Part 33bc01 ×2
  • Door 1 x 3 x 4 with Glass Yellow Part 7930 ×2
  • Ladder Two Piece, Bottom Section Yellow Part 420 ×1
  • Ladder Two Piece, Top Section Yellow Part 421 ×1
  • Window 1 x 1 x 1 Classic with Short Sill [Complete] Yellow Part 3087cc01 ×2
  • Window 1 x 1 x 2, Short Lip [no Glass] Yellow Part 29 ×2
  • Window 1 x 2 x 2 Classic, Short Lip [with Glass] Yellow Part 3081c01 Element 7028 ×6
  • Window 1 x 6 x 3 Panorama with Glass and Hollow Studs Yellow Part 604c01 ×1

Trans-Clear 9 pieces

  • Brick 1 x 2 Trans-Clear Part 3004 Element 4256587 or 300410 ×2
  • Brick 1 x 4 Trans-Clear Part 3010 Element 4256588 or 4227529 ×2
  • Brick Sloped 33° 3 x 4 Trans-Clear Part 3297 Element 329740 ×1
  • Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×2
  • Windscreen 2 x 4 x 1 2/3 Trans-Clear Part 21 ×2

Green 2 pieces

  • Baseplate 24 x 32 with Rounded Corners Green Part 10a ×1
  • Plant, Pine Tree, Large, 4 x 4 x 6 2/3 Green Part 3471 Element 6248463 or 347128 ×1

Light Gray 2 pieces

  • Propeller 2 Blade Light Gray Part 3480 ×2

Milky White 1 piece

  • Antenna with Side Spokes Milky White Part 3144 ×1

Minifigures 3 figures

  • LEGOLAND Blue Minifigure, checked as a whole figure ×1
  • LEGOLAND Black 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.

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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