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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.

Thunder Blazer

Checking

7420 Thunder Blazer

65 pieces in 41 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.

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Piece checklist

Plates 13 pieces

  • Plate 2 x 12 Black Part 2445 Element 244526 ×1
  • Plate 2 x 3 Brown Part 3021 Element 4114000 or 302125 ×2
  • Plate 2 x 8 Brown Part 3034 Element 4141046 or 303425 ×1
  • Plate 2 x 10 Dark Gray Part 3832 Element 4141769 or 383227 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×3
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 4 x 6 Red Part 3032 Element 303221 ×1

Wheels and Tyres 7 pieces

  • Tyre 17.5 x 6 with Shallow Staggered Treads Black Part 51011 Element 4515290 or 4239237 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×1
  • Wheel 11 x 8 with Center Groove Light Gray Part 42610 Element 4168161 ×2
  • Wheel 20 x 30 Technic Red Part 4266 Element 4248905 or 4204800 ×1
  • Wheel Centre Small with Stub Axles (Pulley Wheel) Red Part 3464 Element 4180583 or 346421 ×1

Bricks Sloped 6 pieces

  • Brick Sloped Inverted 34° 3 x 1 without Internal Stopper Brown Part 4287a Element 4118750 or 428725 ×2
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×2
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Light Gray Part 3747a Element 4109695 ×1
  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Light Gray Part 4871 Element 487102 ×1

Plates Wedged 6 pieces

  • Wedge Plate 4 x 9 without Stud Notches Brown Part 2413 Element 4204798 ×4
  • Wedge Plate 4 x 2 Left Red Part 41770 Element 4161329 ×1
  • Wedge Plate 4 x 2 Right Red Part 41769 Element 4160866 ×1

Plates Special 5 pieces

  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×4
  • Plate Special 2 x 4 with Pins Light Gray Part 30157 Element 4141982 ×1

Transportation - Sea and Air 4 pieces

  • Propeller 3 Blade 9 Diameter Black Part 30332 Element 4142731 ×1
  • Wing, Tail 4 x 1 x 3 Dark Gray Part 2340 Element 4186584 ×3

Bricks 3 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×1
  • Brick 1 x 3 Light Gray Part 3622 Element 362202 ×2

Panels 3 pieces

  • Panel 1 x 4 x 1 with Rounded Corners [Thick Wall] Light Gray Part 43337 Element 4171667 or 4140812 ×2
  • Panel 1 x 2 x 1 [Square Corners] Trans-Clear Part 4865a Element 4113106 ×1

Tiles Special 3 pieces

  • Tile Special 1 x 2 with Handle Black Part 2432 Element 243226 ×1
  • Tile Special 1 x 1 with Clip and Straight Tips Dark Gray Part 2555 Element 4112884 ×2

Bricks Round and Cones 2 pieces

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

Bricks Wedged 2 pieces

  • Brick Wedged, Angled 4 x 2 Left Light Gray Part 41768 Element 4160344 ×1
  • Brick Wedged, Angled 4 x 2 Right Light Gray Part 41767 Element 4160326 ×1

Minifig Shields, Weapons, & Tools 2 pieces

  • Weapon Rifle/Gun Dark Gray Part 30141 Element 4106934 ×2

Technic Pins 2 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×2

Tiles Round and Curved 2 pieces

  • Tile Round 2 x 2 with Bottom Cross Red Part 4150 Element 415071 or 415021 ×2

Transportation - Land 2 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×1
  • Wheel Holder, Plate, Round 2 x 2 Thin with Clips Light Gray Part 2655 Element 265502 ×1

Technic Axles 1 piece

  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×1

Technic Bricks 1 piece

  • Technic Brick 1 x 4 [3 Pin Holes] Light Gray Part 3701 Element 370102 ×1

Technic Bushes 1 piece

  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a 1 spare in the box ×1

Minifigures 1 figure

  • Johnny Thunder (Desert) with Chin Scar 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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