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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

722 Universal Building Set

302 pieces in 92 part and color combinations.

LEGO counts 301 pieces. This inventory comes from a separate parts catalog and lists 302; 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 180 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×18
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×24
  • Brick 1 x 3 Red Part 3622 Element 362221 ×4
  • Brick 1 x 4 Red Part 3010 Element 301021 ×10
  • Brick 1 x 6 Red Part 3009 Element 300921 ×12
  • Brick 1 x 8 Red Part 3008 Element 300821 ×12
  • 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 Arch 1 x 6 Red Part 3455 Element 4521570 or 345521 2 spares in the box ×2
  • Brick Sloped 33° 3 x 2 Red Part 3298 Element 329821 ×3
  • 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 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Red Part 3747a Element 374721 ×3
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×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 ×2
  • Door 1 x 3 x 2 Left Red Part 3189 Element 4121824 ×1
  • Door 1 x 3 x 2 Right Red Part 3188 Element 4121823 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×7
  • Plate 1 x 3 Red Part 3623 Element 362321 ×4
  • Plate 1 x 4 Red Part 3710 Element 371021 ×6
  • Plate 1 x 6 Red Part 3666 Element 366621 ×4
  • Plate 1 x 8 Red Part 3460 Element 346021 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×4
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×6
  • Plate 2 x 6 Red Part 3795 Element 379521 ×2
  • Plate 4 x 12 Red Part 3029 Element 4514717 or 302921 ×2
  • Plate 4 x 6 Red Part 3032 Element 303221 ×1
  • Plate 6 x 12 Red Part 3028 Element 4617409 or 4288289 ×1
  • Plate 6 x 16 Red Part 3027 Element 6104519 or 4544524 ×1
  • Plate 6 x 8 Red Part 3036 Element 303671 or 303621 ×1
  • Plate Special 2 x 2 with Helicopter Tail Rotor Holder Red Part 3481 ×2
  • Plate Special 2 x 3 with Helicopter Rotor Holder Red Part 3462 ×1
  • String Reel Winch 2 x 4 x 2 (Light Gray Drum) Red Part 73037 Element 4190523 or 4109857 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×8
  • Tile 1 x 1 with Groove Red Part 3070b Element 307021 1 spare in the box ×2
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×4
  • Turntable 2 x 2 Plate, Base Red Part 3680 Element 368021 ×1

Light Gray 81 pieces

  • Bracket 2 x 2 - 2 x 2 Light Gray Part 3956 Element 395602 ×2
  • Brick 1 x 1 Light Gray Part 3005 Element 300502 ×2
  • Brick 1 x 2 Light Gray Part 3004 Element 300402 ×6
  • Brick 1 x 3 Light Gray Part 3622 Element 362202 ×2
  • Brick 1 x 4 Light Gray Part 3010 Element 301002 ×2
  • Brick 1 x 4 with Black 15 Bars Grill Print Light Gray Part 3010apr0004 ×2
  • Brick 1 x 6 Light Gray Part 3009 Element 300902 ×2
  • Brick 1 x 8 Light Gray Part 3008 Element 300802 ×2
  • Brick Sloped 45° 2 x 1 without Bottom Pin Light Gray Part 3040a ×4
  • Brick Sloped Inverted 45° 2 x 1 Light Gray Part 3665 Element 366502 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Light Gray Part 3660 Element 366002 ×4
  • Door 1 x 3 x 1 Left Light Gray Part 3822 Element 382202 ×1
  • Door 1 x 3 x 1 Right Light Gray Part 3821 Element 382102 ×1
  • Door 1 x 3 x 4 Left Light Gray Part 3193 ×1
  • Door 1 x 3 x 4 Right Light Gray Part 3192 ×1
  • Hinge Plate 2 x 9 with Hole Close to Hinge [Complete Assembly] Light Gray Part 3324ac01 Element 4106906 ×1
  • Hook, Plate 1 x 2 with Crane Hook Right Light Gray Part 3127b ×1
  • Plate 1 x 1 Light Gray Part 3024 Element 302402 1 spare in the box ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×6
  • Plate 1 x 6 Light Gray Part 3666 Element 366602 ×2
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×3
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×5
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×1
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×2
  • Plate 4 x 6 Light Gray Part 3032 Element 303202 ×1
  • Plate 6 x 8 Light Gray Part 3036 Element 303652 or 303602 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thin Open O Clip] Light Gray Part 4085a ×1
  • 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 3 x 2 with Rounded End, Hole Light Gray Part 3176 Element 317652 or 317602 ×1
  • Propeller 2 Blade Light Gray Part 3480 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×1
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×2
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×8

Black 19 pieces

  • Antenna 1 x 4 with Rounded Top Black Part 3957a ×1
  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×4
  • String Cord Thin (0.5mm) [Undetermined Length] Black Part 56823 Element 7009426 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×4
  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 1 spare in the box ×1
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×8

Trans-Clear 12 pieces

  • Brick 1 x 2 Trans-Clear Part 3004 Element 4256587 or 300410 1 spare in the box ×3
  • Brick 1 x 4 Trans-Clear Part 3010 Element 4256588 or 4227529 ×2
  • Brick Sloped 33° 3 x 6 Trans-Clear Part 3939 Element 4190513 or 4124070 ×2
  • Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×2
  • Brick Sloped 65° 2 x 2 x 2 Smooth without Bottom Tube Trans-Clear Part 3678a Element 4190879 or 367840 ×3

Trans-Yellow 6 pieces

  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 1 spare in the box ×4

Yellow 4 pieces

  • Door 1 x 4 x 6 Yellow Part 3644 ×2
  • Propeller 4 Blade 5 Diameter with Hole for Rotor Holder Yellow Part 3461 ×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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