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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 Mission: Master Builders

Checking

3059 Mars Mission: Master Builders

85 pieces in 43 part and color combinations, plus 1 minifigure.

LEGO counts 85 pieces. This inventory comes from a separate parts catalog and lists 90, 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

White 28 pieces

  • Antenna 1 x 4 with Rounded Top White Part 3957a ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×6
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×3
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×2
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin White Part 3040b Element 6552115 or 4121932 ×2
  • Brick Sloped 45° 2 x 2 White Part 3039 Element 6552103 or 303901 ×4
  • Brick Sloped 45° 2 x 2 with Radar Screen Print White Part 3039pr0005 Element 4261941 or 82024 ×1
  • Brick Wedged, Sloped 6 x 4 Cutout, No Stud Notches White Part 6153a Element 615301 ×1
  • Hinge Brick 1 x 2 Top Plate Thin White Part 3938 Element 393801 ×2
  • Wing, Tail 4 x 1 x 3 White Part 2340 Element 6347936 or 234024 ×2

Black 24 pieces

  • Bracket 2 x 2 - 2 x 2 Black Part 3956 Element 6254808 or 6019217 ×1
  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×4
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Black Part 3747b Element 4500458 or 374726 ×1
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×2
  • Dish 4 x 4 Inverted [Radar] Black Part 3960 Element 396026 ×1
  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Black Part 3829c01 Element 73081 ×1
  • Tool Hammer / Mallet Large Black Part 4522 Element 452226 ×1
  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×1
  • Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×2
  • Wheel Hard Plastic Small (22mm D. x 24mm) Black Part 6118 Element 4106928 or 611876 ×4

Blue 13 pieces

  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×2
  • Cone 1 x 1 [No Top Groove] Blue Part 4589 Element 4520957 or 458923 ×2
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×2
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Blue Part 2412b Element 241223 ×4

Dark Gray 9 pieces

  • Brick Special 1 x 1 with Headlight Dark Gray Part 4070 Element 4108044 or 407027 ×2
  • Brick Special 1 x 2 with Pin Dark Gray Part 2458 Element 4113907 or 245827 ×2
  • Brick Special 1 x 2 with Vertical Clip [Thick U Clip] Dark Gray Part 30237a Element 4113207 ×2
  • Equipment Radio [Extended Handle, Compact Speaker Grille] Dark Gray Part 3962b Element 4118707 ×1
  • Plate 1 x 2 Dark Gray Part 3023 Element 4111983 or 302327 ×2

Light Gray 6 pieces

  • Brick Special 2 x 2 with Pin and Axle Hole Light Gray Part 6232 Element 623202 ×2
  • Brick Special 2 x 4 with Pins Light Gray Part 6249 Element 4143670 or 4107104 ×1
  • Plate 4 x 8 Light Gray Part 3035 Element 303502 ×1
  • Wedge Plate 6 x 6 Cut Corner Light Gray Part 6106 Element 610602 ×2

Trans-Neon Orange 2 pieces

  • Dish 2 x 2 Inverted [Radar] Trans-Neon Orange Part 4740 Element 6245295 or 3006347 ×2

[No Color/Any Color] 2 pieces

  • Idea Book, Master Builders Mars Mission [No Color/Any Color] Part b3059 ×1
  • Sticker Sheet for Set 3059-1 [No Color/Any Color] Part 23104 Element 4142045 ×1

Trans-Light Blue 1 piece

  • Windscreen 6 x 4 x 1 1/3 with Hollow Studs Trans-Light Blue Part 6152a Element 615242 ×1

Minifigures 1 figure

  • Astronaut, White, Black Hips, Helmet with Large Chrome Gold Visor, Headset 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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