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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.

Rocket Truck

Checking

31103 Rocket Truck

198 pieces in 90 part and color combinations.

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

Plates 44 pieces

  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×2
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×5
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×1
  • Plate 1 x 6 Dark Green Part 3666 Element 6618082 or 4245566 ×5
  • Plate 2 x 14 Light Bluish Gray Part 91988 Element 4662161 ×1
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×2
  • Plate 1 x 1 Lime Part 3024 Element 4621557 or 4561480 1 spare in the box ×6
  • Plate 1 x 2 Lime Part 3023 Element 4164037 or 4122439 ×3
  • Plate 1 x 6 Lime Part 3666 Element 4534665 or 4529160 ×1
  • Plate 2 x 2 Corner Lime Part 2420 Element 4633822 or 4210207 ×2
  • Plate 2 x 6 Tan Part 3795 Element 4113993 or 379505 ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×7
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×2
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×1
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×2
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×3

Plates Special 19 pieces

  • Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper) Black Part 34103 Element 6199908 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Black Part 10247 Element 6061032 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Dark Bluish Gray Part 48336 Element 6146321 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Green Part 15573 Element 6618101 or 6192250 ×4
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×2
  • Plate Special 1 x 2 with Door Rail Light Bluish Gray Part 32028 Element 4211568 ×8
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Light Bluish Gray Part 99206 Element 4654577 ×1

Bricks Sloped 14 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×2
  • Brick Sloped Inverted 33° 3 x 1 with Internal Stopper and No Front Stud Connection Dark Bluish Gray Part 4287c Element 4211068 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Dark Bluish Gray Part 3660 Element 4211000 ×2
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Light Bluish Gray Part 61409 Element 6092111 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Light Bluish Gray Part 54200 Element 4521921 or 4244372 1 spare in the box ×2
  • Brick Sloped Inverted 45° 2 x 1 Lime Part 3665 Element 6030276 or 4164028 ×2
  • Brick Sloped 65° 2 x 1 x 2 White Part 60481 Element 6552132 or 4515370 ×2

Technic Bushes 14 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×10
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×4

Bricks Curved 11 pieces

  • Brick Curved Inverted 2 x 2 x 2/3 Light Bluish Gray Part 32803 Element 6185676 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Lime Part 11477 Element 6069006 ×6
  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×2
  • Brick Curved 2 x 2 x 2/3 White Part 15068 Element 6552147 or 6047220 ×2

Bricks Special 11 pieces

  • Bracket 3 x 2 x 1 1/3 with Pin Bottom Black Part 18671 Element 6253144 ×4
  • Bracket 5 x 2 x 2 1/3 with Holes, Inside Stud Holder Black Part 76766 Element 6171066 or 6012983 ×1
  • Bracket 5 x 2 x 1 1/3 with Holes, Pin Bottom Light Bluish Gray Part 11215 Element 6028811 ×1
  • Brick Special 1 x 1 with Clip Horizontal Light Bluish Gray Part 60476 Element 6320306 or 4535764 ×2
  • Brick Special 1 x 2 with 2 Studs on 1 Side Light Bluish Gray Part 11211 Element 6015344 ×1
  • Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side White Part 22885 Element 6603759 or 6218823 ×2

Wheels and Tyres 11 pieces

  • Technic Wedge Belt Wheel [aka Pulley] Black Part 4185 Element 6323668 or 6192130 ×1
  • Tyre 37 x 22 ZR Black Part 55978 Element 6518542 or 4499234 ×4
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Black Part 56145 Element 4299389 or 4284946 ×4
  • Wheel 31 x 15 Technic, 7 Pin Holes Dark Bluish Gray Part 60208 Element 4549886 ×2

Plates Wedged 10 pieces

  • Wedge Plate 2 x 2 Left Dark Bluish Gray Part 24299 Element 6143423 ×1
  • Wedge Plate 2 x 2 Right Dark Bluish Gray Part 24307 Element 6143417 ×1
  • Wedge Plate 3 x 2 Left Lime Part 43723 Element 4539907 or 4183168 ×1
  • Wedge Plate 3 x 2 Right Lime Part 43722 Element 4539908 or 4183167 ×1
  • Wedge Plate 2 x 2 Left White Part 24299 Element 6552156 or 6132203 ×2
  • Wedge Plate 2 x 2 Right White Part 24307 Element 6552157 or 6132204 ×2
  • Wedge Plate 4 x 2 Left White Part 41770 Element 6552119 or 4161326 ×1
  • Wedge Plate 4 x 2 Right White Part 41769 Element 6552118 or 4160857 ×1

Technic Axles 7 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×5
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×2

Technic Bricks 7 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×2
  • Technic Brick 1 x 2 [2 Pin Holes] Light Bluish Gray Part 32000 Element 4211541 ×4
  • Technic Brick 4 x 4 with 2 x 2 Opening Light Bluish Gray Part 32324 Element 4211640 ×1

Technic Pins 7 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×3
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×3
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Dark Bluish Gray Part 11214 Element 6015356 ×1

Transportation - Land 7 pieces

  • Engine / Air Scoop 2 x 2 Light Bluish Gray Part 50943 Element 4259422 ×1
  • Wheel Arch, Mudguard 3 x 4 with 2 x 2 Plate Light Bluish Gray Part 28326 Element 6261268 ×2
  • Wheel Arch, Mudguard, 1 1/2 x 6 x 1 [Arch Extended] Lime Part 62361 Element 6534925 or 6476017 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Red Part 3829c01 Element 9552 ×1
  • Seat / Chair 2 x 2 with Center Sprue Mark Reddish Brown Part 4079b ×1

Tiles Special 6 pieces

  • Tile Special 2 x 3 Pentagonal Dark Green Part 22385 Element 6285134 ×2
  • Tile Special 1 x 2 with Handle Light Bluish Gray Part 2432 Element 4211357 ×2
  • Tile Special 2 x 2 Corner with Cut Corner - Facet Light Bluish Gray Part 27263 Element 6177078 ×2

Bars, Ladders and Fences 5 pieces

  • Bar 4L (Lightsaber Blade / Wand) Light Bluish Gray Part 30374 Element 6116608 or 4211628 ×2
  • Bar Holder with Hole and Bar Handle Light Bluish Gray Part 23443 Element 6343976 or 6152107 ×2
  • Lever Small Base with Black Lever Yellow Part 298c02 Element 74156 1 spare in the box ×1

Energy Effects 4 pieces

  • Wave / Flame Rounded with Base Rim Trans-Orange Part 6126b Element 6167741 or 4261397 ×3
  • Wave / Flame Rounded Large with Marbled Trans-Yellow Pattern Trans-Red Part 85959pat0003 Element 6513987 or 6172283 ×1

Hinges, Arms and Turntables 4 pieces

  • Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On Ends Dark Bluish Gray Part 30552 Element 4210694 ×2
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Light Bluish Gray Part 44302a Element 4211804 ×2

Technic Connectors 3 pieces

  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×2
  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Dark Bluish Gray Part 32530 Element 4210763 ×1

Tiles 3 pieces

  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×1
  • Tile 1 x 3 Lime Part 63864 Element 6185307 or 4565993 ×2

Bricks 2 pieces

  • Brick 1 x 2 Dark Green Part 3004 Element 6618072 or 4245570 ×1
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×1

Bricks Round and Cones 2 pieces

  • Brick Round 2 x 2 Dome Top, Hollow Stud Light Bluish Gray Part 30367c Element 4211637 ×1
  • Cone 1 x 1 [Top Groove] Trans-Orange Part 59900 Element 6514017 or 6172233 ×1

Minifig Upper Body 2 pieces

  • Arm Mechanical with Clip [Thick Support] Black Part 98313 Element 6276867 or 6006739 ×2

Panels 2 pieces

  • Panel 1 x 3 x 1 Dark Bluish Gray Part 23950 Element 6149768 ×2

Bricks Wedged 1 piece

  • Brick Wedged, Curved Triple 4 x 6 x 2/3 with 4 Studs White Part 52031 Element 4261565 ×1

Plates Round Curved and Dishes 1 piece

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 3 x 6 x 2 Trans-Brown Part 92583 Element 6503220 or 6255921 ×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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