BlockTalk Find Your Set

Free tool

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.

Challenger Set 100

Checking

4221 Challenger Set 100

62 pieces in 30 part and color combinations, plus 1 minifigure.

The piece count includes the 4 parts inside the set's minifigures, which this inventory lists separately. 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 23 pieces

  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×4
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×2
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×2
  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×2
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×2
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×2
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×2
  • Brick 1 x 1 with Simple Eye Black and White Print Yellow Part 3005pr9996 Element 82357 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×2

Bricks Sloped 11 pieces

  • Brick Sloped 33° 3 x 1 Blue Part 4286 Element 428623 ×2
  • Brick Sloped 33° 3 x 4 Blue Part 3297 Element 6088711 or 329723 ×1
  • Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×2
  • Brick Sloped Inverted 45° 2 x 1 Blue Part 3665 Element 366523 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Blue Part 3660 Element 366023 ×2
  • Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×2

Plates 11 pieces

  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×1
  • Plate 2 x 6 Red Part 3795 Element 379521 ×4
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×2

Wheels and Tyres 8 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4
  • Wheel 8 x 6 Yellow Part 4624 Element 6133542 or 462424 ×4

Bars, Ladders and Fences 3 pieces

  • Antenna 1 x 4 with Rounded Top White Part 3957a ×1
  • Fence Lattice 1 x 4 x 1 Yellow Part 3633 Element 4190509 or 363324 ×2

Bricks Round and Cones 2 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2

Plates Special 2 pieces

  • Plate Special 2 x 2 with Wheel Holders Black Part 4600 Element 460026 ×2

Bricks Special 1 piece

  • Brick Special 1 x 2 with Pin Blue Part 2458 Element 245823 ×1

Transportation - Sea and Air 1 piece

  • Propeller 3 Blade 3 Diameter with Axle Cross Black Part 6041 Element 604126 ×1

Minifigures 1 figure

  • Man - White Torso with Dolphin, Black Legs, Sunglasses Minifigure, checked as a whole figure ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy