BlockTalk Find Your Set

Free tool

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 Command Trailer

Checking

1558 Mobile Command Trailer

50 pieces in 25 part and color combinations, plus 2 minifigures.

The piece count includes the 18 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.

Show

Piece checklist

Plates 16 pieces

  • Plate 1 x 2 Blue Part 3023 Element 302323 ×4
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×4
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×4
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×1
  • Plate 4 x 4 Blue Part 3031 Element 4243815 or 303123 ×1
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 ×2

Wheels and Tyres 9 pieces

  • Wheel Balloon with Axle hole Black Part 4288 Element 4113076 or 428876 ×6
  • Plate Special 2 x 2 with Wheels Red Light Gray Part 122c01 ×3

Minifig Accessories 5 pieces

  • Equipment Radio [Compact Handle] Black Part 3962a ×1
  • Equipment Control Panel Light Gray Part 2342 Element 4109700 ×4

Plates Round Curved and Dishes 3 pieces

  • Dish 2 x 2 Inverted [Radar] Trans-Yellow Part 4740 Element 6580384 or 6462604 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×2

Plates Special 3 pieces

  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) Blue Part 4596 ×1
  • Plate Special 1 x 4 Offset with Bar Holes Blue Part 4590 Element 4541292 or 4248164 ×2

Bars, Ladders and Fences 2 pieces

  • Bar 1 x 3 [Clip / Anti-Stud] Light Gray Part 4735 Element 4141579 or 473552 ×2

Bricks Round and Cones 2 pieces

  • Cone 1 x 1 [No Top Groove] Blue Part 4589 Element 4520957 or 458923 ×2

Bricks Sloped 2 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Blue Part 3040b Element 4121936 or 304023 ×2

Hinges, Arms and Turntables 2 pieces

  • Hinge Plate 2 x 4 with Articulated Joint - Female Blue Part 3640 Element 364023 ×1
  • Hinge Plate 2 x 4 with Articulated Joint - Male Blue Part 3639 Element 363923 ×1

Minifig Neckwear 2 pieces

  • Minifig Neckwear Airtanks Black Part 3838 Element 4550642 or 383826 ×1
  • Minifig Neckwear Airtanks Yellow Part 3838 Element 4631564 or 383824 ×1

Bricks Special 1 piece

  • Brick Special, Cockpit Space Nose with Silver and Black V Print Blue Part 2336pr0001 ×1

Minifig Shields, Weapons, & Tools 1 piece

  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1

Plates Wedged 1 piece

  • Wedge Plate 3 x 4 without Stud Notches Blue Part 4859 ×1

Tiles 1 piece

  • Tile 1 x 2 with Space Computer Print Blue Part 3069bpr0039 ×1

Minifigures 2 figures

  • Classic Spaceman, Yellow with Jetpack (3842b Helmet) Minifigure, checked as a whole figure ×1
  • Classic Spaceman, Black with Jetpack (3842b 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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy