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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.

Mars Exploration Minifigure Pack

Checking

40345 Mars Exploration Minifigure Pack

24 pieces in 19 part and color combinations, plus 4 minifigures.

The official piece count includes the 20 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 Special 4 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Bluish Gray Part 15573 Element 6092572 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] Dark Bluish Gray Part 88072 Element 6261355 or 4611703 ×1
  • Plate Special / Shield Rectangular with 4 Studs, Handle White Part 30166 Element 6188400 ×1
  • Plate Special 1 x 1 Rounded with Handle White Part 26047 Element 6564914 or 6174937 ×1

Bars, Ladders and Fences 3 pieces

  • Antenna 1 x 4 with Flat Top Light Bluish Gray Part 3957b Element 4211473 ×1
  • Bar Holder with Clip White Part 11090 Element 6341465 or 6136789 ×2

Minifig Accessories 3 pieces

  • Equipment Camera Handheld with Central Viewfinder Black Part 30089b Element 6476480 or 4106552 ×1
  • Equipment Laptop Black Part 62698 Element 6087083 or 4527063 ×1
  • Equipment Metal Detector, no Stud on Search Head Black Part 93106 Element 6168638 or 4637372 ×1

Bricks 2 pieces

  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×2

Containers 2 pieces

  • Box 2 x 2 x 2 [Hollow Studs] Light Bluish Gray Part 4345b Element 4211491 ×1
  • Box 2 x 2 x 2 Door with Slot Trans-Clear Part 4346 Element 6499105 or 6247357 ×1

Minifig Shields, Weapons, & Tools 2 pieces

  • Tool Jackhammer / Motor Hammer Dark Bluish Gray Part 30228 Element 4261117 or 4211083 ×1
  • Tool Screwdriver and Spanner / Wrench Flat Silver Part 4006 Element 6167576 ×1

Plates 2 pieces

  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×1
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1

Rock 2 pieces

  • Geode / Rock with Glitter Trans-Bright Green Crystal Dark Bluish Gray Part 49656pat0003 Element 6264268 ×2

Tiles 2 pieces

  • Tile 1 x 4 with Solar Panels Print Dark Blue Part 2431pr0115 Element 6215341 ×2

Tiles Round and Curved 2 pieces

  • Tile Round 1 x 1 Trans-Light Blue Part 98138 Element 6514192 or 6274739 1 spare in the box ×2

Minifigures 4 figures

  • Astronaut, Woman, Orange Torso and Legs, White Helmet, Trans-Light Blue Visor Minifigure, checked as a whole figure ×1
  • Technician - Dark Blue Torso, Dark Blue Legs, White Helmet Minifigure, checked as a whole figure ×1
  • Astronaut - White Torso and Legs, Lime decor, White Helmet Trans Orange Visor Minifigure, checked as a whole figure ×1
  • Scientist - White Torso, Lab Coat, Light Bluish Grey Legs, Reddish Brown Hair 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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