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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.

Alien Defender

Checking

7050 Alien Defender

97 pieces in 44 part and color combinations, plus 2 minifigures.

The official piece count includes the 8 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 Round Curved and Dishes 15 pieces

  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×12
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×2

Plates Special 12 pieces

  • Plate Special 1 x 4 with Wheels Holder Black Part 2926 Element 6338416 or 292626 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Light Bluish Gray Part 4081b Element 6281998 or 4632575 ×4
  • Plate Special 1 x 1 with Clip Vertical [Thin U Clip] Light Bluish Gray Part 4085b Element 4542317 or 4517961 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] Light Bluish Gray Part 2540 Element 4211632 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Lime Part 3794a Element 4160084 ×2

Bricks Sloped 10 pieces

  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Dark Bluish Gray Part 61409 Element 4540386 or 4521185 ×4
  • Brick Sloped 30° 1 x 2 x 2/3 Dark Bluish Gray Part 85984 Element 4567887 ×5
  • Brick Sloped 45° 2 x 2 Reddish Brown Part 3039 Element 4211202 ×1

Wheels and Tyres 8 pieces

  • Tyre 21 x 12 with Offset Tread Small Wide and Beveled Tread Edge Black Part 60700 Element 4514560 ×4
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin Yellow Part 6014b Element 4170460 ×4

Bricks Round and Cones 7 pieces

  • Brick Round 2 x 2 [Grill] Light Bluish Gray Part 92947 Element 4650645 or 4610816 ×1
  • Cone 1 x 1 [Top Groove] Trans-Neon Green Part 59900 Element 6301321 or 6172230 ×2
  • Cone 1 x 1 [Top Groove] Trans-Neon Orange Part 59900 Element 6301326 or 6172239 ×4

Hinges, Arms and Turntables 6 pieces

  • Hinge Brick 2 x 2 Top Plate Thin Blue Part 6134 Element 4195007 or 4118900 ×2
  • Turntable 2 x 2 Plate, Base Blue Part 3680 Element 368023 ×1
  • Hinge Brick 1 x 2 Base Dark Bluish Gray Part 3937 Element 4211066 ×2
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1

Tiles 6 pieces

  • Tile 1 x 3 Light Bluish Gray Part 63864 Element 4558169 ×4
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×2

Minifig Shields, Weapons, & Tools 5 pieces

  • Weapon Gun / Pistol / Revolver Large Barrel, Long Grip Dark Bluish Gray Part 30132 Element 6359933 or 6056822 1 spare in the box ×2
  • Weapon Gun / Pistol Two Barrel, 10 Ribs Dark Bluish Gray Part 95199 Element 4623236 ×2
  • Weapon Gun Ray / Sci Fi Flat Silver Part 87993 Element 4625812 ×1

Bricks Special 4 pieces

  • Brick Special 1 x 4 with 4 Studs on One Side Blue Part 30414 Element 4212411 or 4141768 ×1
  • Brick Special 1 x 1 with Headlight Dark Bluish Gray Part 4070 Element 4211044 ×2
  • Brick Special 1 x 2 with Grille Light Bluish Gray Part 2877 Element 4211383 ×1

Technic Pins 4 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
  • Technic Pin 1/2 with 2L Bar Extension Light Bluish Gray Part 61184 Element 6347715 or 4520320 ×2

Bars, Ladders and Fences 3 pieces

  • Lever Small Base with Black Lever Red Part 298c02 Element 74335 1 spare in the box ×1
  • Lever Small Base with Black Lever Yellow Part 298c02 Element 74156 1 spare in the box ×2

Bricks Curved 3 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Blue Part 6091 Element 6347945 or 4519981 ×2
  • Brick Curved 2 x 2 with Lip, No Studs Trans-Light Blue Part 30602 Element 6171718 or 6064345 ×1

Transportation - Land 3 pieces

  • Wheel Arch, Curved Wedge 4 x 3 with 2 x 2 Opening and 4 Studs Blue Part 47755 Element 4626361 ×1
  • Mudguard 2 x 4 with 2 x 2 Studs and Flared Wings Dark Bluish Gray Part 41854 Element 6602848 or 4210812 ×1
  • Vehicle Base 4 x 10 x 2/3 with 2 x 2 Recessed Center with Smooth Underside, 1 x 2 Cutouts, No Center Hole Dark Bluish Gray Part 4212b ×1

Animal / Creature Body Parts 2 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Lime Part 53451 Element 6337299 or 4579250 1 spare in the box ×2

Plates 2 pieces

  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×2

Technic Bricks 2 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×2

Technic Connectors 2 pieces

  • Technic Axle and Pin Connector Angled #1 Dark Bluish Gray Part 32013 Element 32013199 or 6296856 ×2

Bricks 1 piece

  • Brick 2 x 4 Dark Bluish Gray Part 3001 Element 4211085 ×1

Plates Wedged 1 piece

  • Wedge Plate 2 x 4 Blue Part 51739 Element 4609454 ×1

Stickers 1 piece

  • Sticker Sheet for Set 7050-1 [No Color/Any Color] Part 96456 Element 4626003 ×1

Minifigures 2 figures

  • Alien Pilot Minifigure, checked as a whole figure ×1
  • ADU Soldier, Orange Sunglasses, Dark Bluish Gray Hips 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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