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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.

Mobile Ground Tracking Station

Checking

452 Mobile Ground Tracking Station

74 pieces in 39 part and color combinations, plus 1 minifigure.

LEGO counts 76 pieces. This inventory comes from a separate parts catalog and lists 79, including the 5 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

Bricks 14 pieces

  • Brick 1 x 1 Light Gray Part 3005 Element 300502 ×2
  • Brick 1 x 2 Light Gray Part 3004 Element 300402 ×4
  • Brick 1 x 2 with Classic Space Logo Print Light Gray Part 3004pr9970 ×2
  • Brick 1 x 3 Light Gray Part 3622 Element 362202 ×2
  • Brick 2 x 4 without Cross Supports Light Gray Part 3001a ×1
  • Brick 1 x 2 without Bottom Tube Trans-Yellow Part 3065 Element 6514265 or 6244907 ×3

Plates 14 pieces

  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×2
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×2
  • Plate 2 x 3 Light Gray Part 3021 Element 302102 ×4
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×2
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×1
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×1

Wheels and Tyres 12 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×8
  • Plate Special 2 x 2 with Wheels Red Light Gray Part 122c01 ×4

Hinges, Arms and Turntables 8 pieces

  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×1
  • Hinge Brick 1 x 2 Top Plate Thin Light Gray Part 3938 Element 393802 ×1
  • Hinge Brick 1 x 4 [Lower] Light Gray Part 3831 Element 383102 ×2
  • Hinge Brick 1 x 4 [Upper] Light Gray Part 3830 Element 383002 ×2
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Turntable 2 x 2 Plate, Base Light Gray Part 3680 Element 4242118 or 368002 ×1

Plates Special 5 pieces

  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×2
  • Plate Special 1 x 2 with Handles [Round Ends, Mid Attachment] Light Gray Part 3839a ×1
  • Plate Special 2 x 2 with Towball Light Gray Part 3729 Element 372902 ×1
  • Plate Special 2 x 2 with Towball Socket, Short, 4 Slots Light Gray Part 3730 Element 373002 ×1

Tiles 5 pieces

  • Tile 1 x 1 with Groove Light Gray Part 3070b Element 307052 or 307002 ×2
  • Tile 1 x 2 with Groove Light Gray Part 3069b Element 306902 ×3

Transportation - Land 5 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×1
  • Wheel Arch, Mudguard 2 x 4 Studded Light Gray Part 3788 Element 378802 ×2
  • Wheel Arch, Mudguard 2 x 4 [Smooth] Light Gray Part 3787 ×2

Bricks Round and Cones 3 pieces

  • Brick Round 1 x 1 Open Stud Light Gray Part 3062b Element 306202 ×2
  • Brick Round 1 x 1 Solid Stud Trans-Green Part 3062a ×1

Minifig Shields, Weapons, & Tools 3 pieces

  • Weapon Gun / Torch (Space) [with Grooves] Light Gray Part 3959 Element 4254948 or 395952 ×1
  • Shield Round with Stud Trans-Clear Part 3876 ×2

Bars, Ladders and Fences 1 piece

  • Antenna 1 x 4 with Rounded Top Light Gray Part 3957a Element 395702 ×1

Bricks Sloped 1 piece

  • Brick Sloped 45° 2 x 2 with Computer Screen Print Light Gray Part 3039pr0026 ×1

Minifig Neckwear 1 piece

  • Minifig Neckwear Airtanks Light Gray Part 3838 Element 4212314 ×1

Plates Round Curved and Dishes 1 piece

  • Dish 4 x 4 Inverted [Radar] Light Gray Part 3960 Element 4143013 or 396002 ×1

Technic Connectors 1 piece

  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×1

Minifigures 1 figure

  • Classic Spaceman, White with Airtanks (3842a 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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