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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.

Tread Trekker

Checking

8229 Tread Trekker

176 pieces in 57 part and color combinations, plus 1 minifigure.

LEGO counts 186 pieces. This inventory comes from a separate parts catalog and lists 179, including the 3 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

Technic Bushes 29 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×15
  • Technic Bush 1/2 Toothed Type II [X Opening] Light Gray Part 4265b Element 4100501 or 657702 1 spare in the box ×14

Technic Axles 28 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×12
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×3
  • Technic Axle 6 Black Part 3706 Element 370626 ×5
  • Technic Axle 8 Black Part 3707 Element 370726 ×6

Technic Pins 22 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×8
  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 1 spare in the box ×4
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×6

Technic Connectors 21 pieces

  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Gray Part 6538b Element 4113804 or 4100408 ×5
  • Technic Axle Connector with Axle Hole Light Gray Part 32039 Element 4106469 ×4
  • Technic Axle and Pin Connector Angled #3 - 157.5° Light Gray Part 32016 Element 4106379 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Gray Part 32015 Element 4106378 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° Light Gray Part 32014 Element 4143353 or 4106377 ×2
  • Technic Axle and Pin Connector Perpendicular Light Gray Part 6536 Element 4173667 or 653602 ×4

Plates 16 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 4 x 8 Black Part 3035 Element 303526 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 1 x 6 Red Part 3666 Element 366621 ×5
  • Plate 1 x 8 Red Part 3460 Element 346021 ×1
  • Plate 2 x 12 Red Part 2445 Element 4255035 or 4161545 ×1
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2

Technic Bricks 11 pieces

  • Technic Brick 1 x 14 [13 Pin Holes] Red Part 32018 Element 4173800 or 4107557 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×3
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×2
  • Technic Slope Long 1 x 6 with 3 Pin Holes Red Part 2744 Element 6337300 or 4508550 ×2

Technic Beams 10 pieces

  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×2
  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 2 spares in the box ×2
  • Technic Beam Triangle Thin [Type I] Black Part 2905 Element 4142543 or 290526 ×2
  • Technic Beam 1 x 4 Thin with Stud Connector Light Gray Part 2825 Element 4107133 or 282502 2 spares in the box ×2
  • Technic Beam 1 x 11.5 Double Bent Thick Red Part 32009 Element 6271160 or 4268653 ×2

Wheels and Tyres 6 pieces

  • Tread Large, Technic [34 Links] Black Part 71372 Element 4107488 ×2
  • Technic Tread Hub White Part 32007 Element 4107487 ×4

Plates Special 5 pieces

  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Red Part 2444 Element 244421 ×4
  • Technic Plate 2 x 8 [7 Holes] Red Part 3738 Element 373821 ×1

Plates Wedged 5 pieces

  • Wedge Plate 3 x 3 Cut Corner Red Part 2450 Element 245021 ×2
  • Wedge Plate 4 x 8 Tail Red Part 3474 Element 347421 ×1
  • Wedge Plate 8 x 4 Wing Left Red Part 3933 Element 4179209 or 4107659 ×1
  • Wedge Plate 8 x 4 Wing Right with Stud Notch Red Part 3934 Element 4179210 or 4107660 ×1

Technic Gears 5 pieces

  • Technic Ball with 8 Grooves Light Gray Part 2907 Element 290702 ×1
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×2
  • Technic Gear 24 Tooth [Old Style - Three axle holes] Light Gray Part 3648a ×1
  • Technic Worm Gear Light Gray Part 4716 Element 471602 ×1

Bricks Sloped 4 pieces

  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×4

Technic Steering, Suspension and Engine 4 pieces

  • Technic Engine Crankshaft Light Gray Part 2853 Element 4119475 or 285302 ×4

Technic Special 2 pieces

  • Technic Gearbox 2 x 4 x 3 1/3 Black Part 6588 Element 4109828 ×1
  • Technic Seat / Chair [3 x 2 Base] Blue Part 2717 Element 4252489 or 4225498 ×1

Tiles 2 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1

Tiles Special 2 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Light Gray Part 2412b Element 241202 ×2

Transportation - Sea and Air 2 pieces

  • Wing, Tail 4 x 1 x 3 Red Part 2340 Element 6013636 or 4217653 ×2

Plants & Trees 1 piece

  • Plant, Palm Tree Trunk - Short Connector, Axle Hole with 2 Inside Prongs Black Part 6135 Element 613526 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8229-1 [No Color/Any Color] Part 71463 Element 4106747 ×1

Minifigures 1 figure

  • Technic Figure Black Legs, Light Gray Top with 2 Brown Belts, Black Arms - Black Helmet 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.

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