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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.

Mission 1: Jetpack Pursuit

Checking

8631 Mission 1: Jetpack Pursuit

78 pieces in 53 part and color combinations, plus 2 minifigures.

The official piece count includes the 10 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

Technic Pins 12 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×3
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×3
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×1
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×3

Plates 10 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 1 x 3 Dark Bluish Gray Part 3623 Element 4211133 ×2
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×1
  • Plate 2 x 2 Orange Part 3022 Element 4613982 or 4159007 ×3
  • Plate 1 x 2 Red Part 3023 Element 302321 ×2

Technic Bricks 8 pieces

  • Technic Brick 1 x 10 [9 Pin Holes] Black Part 2730 Element 273026 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×1
  • Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×1
  • Technic Brick 1 x 6 [5 Pin Holes] Black Part 3894 Element 389426 ×1
  • Technic Brick 1 x 1 with Pin Hole Light Bluish Gray Part 6541 Element 4211535 ×2
  • Technic Brick 1 x 2 [2 Pin Holes] Light Bluish Gray Part 32000 Element 4211541 ×2

Plates Special 7 pieces

  • Bracket 1 x 2 - 2 x 2 Black Part 44728 Element 6117973 or 6048855 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×2
  • Bracket 1 x 2 - 2 x 2 Light Bluish Gray Part 44728 Element 6117967 or 6009014 ×2
  • Plate Special 1 x 4 with Angled Tubes Pearl Light Gray Part 61072 Element 4518406 ×2

Tiles Special 6 pieces

  • Tile Special 1 x 1 with Clip and Straight Tips Dark Bluish Gray Part 2555 Element 6031420 or 4211069 ×3
  • Tile Special 1 x 2 with Handle Dark Bluish Gray Part 2432 Element 4211039 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Metallic Silver Part 2412b Element 6051422 or 4579833 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Orange Part 2412b Element 4125254 or 3933106 ×1

Hinges, Arms and Turntables 4 pieces

  • Hinge 1 x 2 Locking with 2 Fingers and Towball Socket, 9 Teeth Black Part 30396 Element 4144567 or 4143351 ×1
  • Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On Ends Black Part 30552 Element 4158848 ×1
  • Hinge Cylinder 1 x 3 Locking with 1 Finger and Technic Friction Pin with Round Hole Black Part 41532 Element 4159335 ×1
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Light Bluish Gray Part 44302a Element 4211804 ×1

Minifig Accessories 4 pieces

  • Tap 1 x 1 with Hole in Spout Black Part 4599a ×2
  • Tap 1 x 1 with Hole in Spout Light Bluish Gray Part 4599a ×2

Bricks Sloped 3 pieces

  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×1
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Black Part 3747b Element 4500458 or 374726 ×1
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Orange Part 54200 Element 4504371 or 4248195 1 spare in the box ×1

Transportation - Sea and Air 3 pieces

  • Tail Shuttle - Small Dark Blue Part 44661 Element 4527987 ×2
  • Propeller 3 Blade 9 Diameter Pearl Light Gray Part 30332 Element 4527986 ×1

Wheels and Tyres 3 pieces

  • Tread Small (20 Links) Black Part 43903 Element 4180576 ×1
  • Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Light Bluish Gray Part 55981 Element 6109684 or 4299119 ×2

Bricks Wedged 2 pieces

  • Brick Wedged, Sloped 45° 2 x 4 Triple Black Part 47759 Element 6301912 or 6188706 ×1
  • Brick Wedged, Sloped 6 x 4 Cutout, Stud Notches Black Part 6153b Element 6048746 or 4528717 ×1

Large Buildable Figures 2 pieces

  • Large Figure Weapon Blade, Ice Skate / Ice Blade Half Pearl Light Gray Part 44032 Element 4528719 or 4178662 ×2

Plates Round Curved and Dishes 2 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 ×1
  • Dish 2 x 2 Inverted [Radar] Trans-Neon Orange Part 4740 Element 6245295 or 3006347 ×1

Technic Connectors 2 pieces

  • Technic Pin Connector Plate with One Hole (Single on Bottom) Black Part 32529 Element 4144023 ×1
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×1

Tiles 2 pieces

  • Tile 1 x 2 with Avionics Copper, Red & Silver Controls Print Black Part 3069bpr0070 Element 6021512 or 4162982 ×1
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1

Tubes and Hoses 2 pieces

  • Flexible Hose 8.5L with Tabbed Ends (Ends same color as Tube) Black Part 73590c02a Element 4540890 or 621130 ×2

Bars, Ladders and Fences 1 piece

  • Bar 1 x 8 with Brick 1 x 2 Curved Top End (Axle Holder Inside Small End) Black Part 30359b Element 4164067 ×1

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 x 1 2/3 Dome Top, Blocked Open Stud Trans-Clear Part 30151a Element 4113949 ×1

Rock 1 piece

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Red Part 30153 Element 6513969 or 6247785 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8631-1 [No Color/Any Color] Part 63316 Element 4528710 ×1

Supports, Girders and Cranes 1 piece

  • Hook with Towball Dark Bluish Gray Part 30395 Element 30395199 or 6347464 ×1

Transportation - Land 1 piece

  • Handlebars Light Bluish Gray Part 30031 Element 4258308 ×1

Minifigures 2 figures

  • Saw Fist Minifigure, checked as a whole figure ×1
  • Agent Chase with Neck Bracket 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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