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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

Checking

979760 Mars Exploration

810 pieces in 96 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Bricks 147 pieces

  • Brick 2 x 10 Black Part 3006 Element 4617860 or 300626 ×12
  • Brick 2 x 4 Black Part 3001 Element 300126 ×1
  • Brick 2 x 6 Black Part 2456 Element 4181144 or 245626 ×3
  • Brick 2 x 8 Black Part 3007 Element 6037390 or 300726 ×4
  • Brick 1 x 1 Dark Orange Part 3005 Element 6254484 or 6000643 ×4
  • Brick 4 x 6 Light Gray Part 2356 Element 4190379 or 4181123 ×4
  • Brick 1 x 1 Orange Part 3005 Element 4173805 or 4119645 ×4
  • Brick 1 x 4 Red Part 3010 Element 301021 ×2
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×26
  • Brick 2 x 4 Red Part 3001 Element 300121 ×60
  • Brick 2 x 6 Red Part 2456 Element 4181138 or 245621 ×17
  • Brick 2 x 8 Red Part 3007 Element 6036408 or 300721 ×10

Plates 106 pieces

  • Plate 2 x 10 Black Part 3832 Element 383226 ×17
  • Plate 2 x 6 Black Part 3795 Element 379526 ×4
  • Plate 6 x 16 Black Part 3027 Element 302726 ×2
  • Plate 1 x 1 Dark Blue Part 3024 Element 6554188 or 4184108 ×4
  • Plate 1 x 6 Dark Gray Part 3666 Element 4109987 or 366627 ×4
  • Plate 2 x 12 Dark Gray Part 2445 Element 4112847 or 4112526 ×6
  • Plate 6 x 12 Dark Gray Part 3028 Element 4140489 ×12
  • Plate 1 x 8 Orange Part 3460 Element 6210229 or 4497175 ×14
  • Plate 1 x 2 Red Part 3023 Element 302321 ×6
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×15
  • Plate 6 x 16 Red Part 3027 Element 6104519 or 4544524 ×13
  • Plate 6 x 8 Red Part 3036 Element 303671 or 303621 ×7

Bricks Sloped 102 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×2
  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Black Part 4871 Element 4188534 or 487126 ×9
  • Brick Sloped 33° 3 x 1 Red Part 4286 Element 428621 ×2
  • Brick Sloped 33° 3 x 2 Red Part 3298 Element 329821 ×22
  • Brick Sloped 33° 3 x 4 Red Part 3297 Element 329721 ×67

Technic Axles 88 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×6
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×6
  • Technic Axle 5.5 with Stop [Flat Short End] Black Part 32209 Element 4124045 ×12
  • Technic Axle 6 Black Part 3706 Element 370626 ×10
  • Technic Axle 3 Light Gray Part 4519 Element 4186007 ×4
  • Technic Axle 5 Light Gray Part 32073 Element 4141482 ×12
  • Technic Axle 7 Light Gray Part 44294 Element 4183835 ×34

Tiles 84 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 Also in Dark Blue ×6
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×10
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×2
  • Tile 1 x 2 with Groove Dark Blue Part 3069b Element 6554190 or 4528488 Also in Black ×8
  • Tile 2 x 2 with Groove Dark Blue Part 3068b Element 4205004 ×43
  • Tile 1 x 8 with Groove Red Part 4162 Element 416221 ×2
  • Tile 1 x 6 with Groove Yellow Part 6636 Element 6388488 or 663624 ×13

Technic Connectors 75 pieces

  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×5
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×9
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×5
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×1
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×1
  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Gray Part 6538b Element 4113804 or 4100408 ×10
  • Technic Axle and Pin Connector Angled #2 - 180° Light Gray Part 32034 Element 4107830 ×8
  • Technic Axle and Pin Connector Angled #3 - 157.5° Light Gray Part 32016 Element 4106379 ×6
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Gray Part 32015 Element 4106378 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° Light Gray Part 32014 Element 4143353 or 4106377 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Gray Part 32184 Element 4124443 ×2
  • Technic Pin Connector Round [No Slot] Light Gray Part 75535 Element 4141506 ×4
  • Technic Axle and Pin Connector Angled #3 - 157.5° Red Part 32016 Element 6261396 or 6176754 ×6
  • Technic Axle Connector Ridged [with x Hole x Orientation] Yellow Part 6538b Element 4140507 ×14

Technic Pins 67 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×22
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×8
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×1
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Gray Part 32054 Element 4195303 ×26
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×6
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4

Technic Bricks 38 pieces

  • Technic Brick 1 x 10 [9 Pin Holes] Black Part 2730 Element 273026 ×4
  • Technic Brick 1 x 10 [9 Pin Holes] Red Part 2730 Element 273021 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×4
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Yellow Part 32064b ×24

Technic Beams 18 pieces

  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×2
  • Technic Beam 1 x 15 Thick Light Gray Part 32278 Element 4172457 ×6
  • Technic Beam 1 x 5 Thin Light Gray Part 32017 Element 4106885 ×4
  • Technic Beam 1 x 9 Thick Light Gray Part 40490 Element 4195406 ×6

Supports, Girders and Cranes 15 pieces

  • Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole Dark Gray Part 3940b Element 4114514 or 394027 ×15

Plates Special 14 pieces

  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×1
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×5
  • Technic Plate 2 x 8 [7 Holes] Red Part 3738 Element 373821 ×8

Rock 14 pieces

  • Rock Boulder 4 x 4, Bottom Brown Part 30294 Element 4164156 or 4164088 ×7
  • Rock Boulder 4 x 4, Top Brown Part 30293 Element 4168208 or 4142848 ×7

Technic Bushes 10 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×6
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×4

Bricks Round and Cones 9 pieces

  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×9

Plates Round Curved and Dishes 4 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Blue Part 4032a Element 403223 ×4

Plates Wedged 4 pieces

  • Wedge Plate 6 x 12 Left Light Gray Part 30355 Element 4124088 ×2
  • Wedge Plate 6 x 12 Right Light Gray Part 30356 Element 4124089 ×2

Tubes and Hoses 4 pieces

  • Hose, Ribbed 7mm D. 9L / 7.2cm Black Part 78c09 Element 6443871 or 6420612 ×4

Wheels and Tyres 4 pieces

  • Technic Wedge Belt Wheel [aka Pulley] Black Part 4185 Element 6323668 or 6192130 ×2
  • Wheel Balloon with Axle hole Black Part 4288 Element 4113076 or 428876 ×2

Gear Parts 3 pieces

  • Storage Bin, Dacta, Medium Blue Part upn0038 ×1
  • Storage Bin Lid, Dacta, 19 x 24 Trans-Clear Part 71082 ×1
  • Activity Booklet - Cover and Inventory Card - Set 979760 [No Color/Any Color] Part 979760bc ×1

Electronics 2 pieces

  • Motor Pulley, 9V Micromotor with axle hole Light Gray Part 2983 Element 298630 ×2

String, Bands and Reels 2 pieces

  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×2

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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