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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.

Wheel Set

Checking

021 Wheel Set

183 pieces in 42 part and color combinations.

LEGO counts 185 pieces. This inventory comes from a separate parts catalog and lists 183; 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.

Show

Piece checklist

Bricks 107 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×5
  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×2
  • Brick 1 x 1 Blue Part 3005 Element 300523 ×4
  • Brick 2 x 2 without Inside Ridges Blue Part 3003a ×2
  • Brick 2 x 3 without Cross Supports Blue Part 3002a ×3
  • Brick 2 x 4 without Cross Supports Blue Part 3001a ×2
  • Brick 10 x 20 without Bottom Tubes, with '+' Cross Support (early Baseplate) Light Gray Part 700b ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×24
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×1
  • Brick 1 x 6 Red Part 3009 Element 300921 ×7
  • Brick 1 x 8 Red Part 3008 Element 300821 ×2
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×5
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×3
  • Brick 2 x 3 without Cross Supports Red Part 3002a ×7
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×10
  • Brick 2 x 8 Red Part 3007 Element 6036408 or 300721 ×4
  • Brick 1 x 1 Trans-Clear Part 3005 Element 6514207 or 6220959 ×13
  • Brick 1 x 2 Trans-Clear Part 3004 Element 4256587 or 300410 ×4
  • Brick 2 x 2 without Inside Ridges Trans-Clear Part 3003a ×4
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×1
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×1
  • Brick 2 x 2 without Inside Ridges Yellow Part 3003a ×2

Bricks Sloped 24 pieces

  • Brick Sloped 45° 2 x 1 Triple with Hollow Underside Red Part 3048a ×2
  • Brick Sloped 45° 2 x 1 without Bottom Pin Red Part 3040a ×6
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×2
  • Brick Sloped 45° 2 x 2 Double Concave Red Part 3046a Element 4218892 or 4200489 ×2
  • Brick Sloped 45° 2 x 2 Double Convex Red Part 3045 Element 4163087 or 304521 ×4
  • Brick Sloped 45° 2 x 3 Red Part 3038 Element 6303213 or 4195081 ×4
  • Brick Sloped 45° 2 x 4 Red Part 3037 Element 303721 ×4

Plates 22 pieces

  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×14
  • Plate 2 x 8 with Waffle Bottom White Part 3034a ×4
  • Plate 4 x 8 with Waffle Bottom White Part 3035a ×2
  • Plate 6 x 8 with Waffle Bottom White Part 3036a ×2

Wheels and Tyres 22 pieces

  • Tyre Smooth Old Style - Large Light Gray Part 36 ×2
  • Tyre Smooth Old Style - Small Light Gray Part 132a ×6
  • Wheel Old with 12 Studs Red Part 715 ×2
  • Wheel Old with 4 Studs Red Part 7039 Element 7039 ×6
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Red Inside White Part 7049bc01 ×6

Bricks Round and Cones 6 pieces

  • Brick Round 1 x 1 Solid Stud Black Part 3062a ×4
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch Blue Part 3063b Element 4497190 or 4239392 ×2

Hinges, Arms and Turntables 2 pieces

  • Hinge Coupling, Two Connected 2 x 2 Plates [Nylon] Milky White Part 650 ×1
  • Turntable 4 x 4 - Old Type Complete, Perfectly Round White Part 3404bc01 ×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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