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.

Cosmic Comet

Checking

6825 Cosmic Comet

35 pieces in 20 part and color combinations, plus 1 minifigure.

The official piece count includes the 5 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 Special 8 pieces

  • Bracket 3 x 2 - 2 x 2 [aka Space Seat] Blue Part 4598 Element 4657998 or 459823 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Blue Part 4623 Element 4280139 ×1
  • Plate Special 1 x 2 with Long Stud Receptacle (Space Wing) Blue Part 4596 ×3
  • Plate Special 1 x 4 Offset with Bar Holes Blue Part 4590 Element 4541292 or 4248164 ×2
  • Plate Special 1 x 4 Offset with Bar Holes Light Gray Part 4590 Element 4248161 or 4114067 ×1

Bricks Round and Cones 6 pieces

  • Brick Round 2 x 2 with Axle Hole Light Gray Part 3941 Element 614302 or 394102 ×2
  • Cone 1 x 1 [No Top Groove] Trans-Red Part 4589 Element 618841 ×4

Plates Round Curved and Dishes 6 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Gray Part 4032a Element 403202 ×1
  • Dish 2 x 2 Inverted [Radar] Trans-Red Part 4740 Element 6580377 or 6245303 ×3
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×2

Bars, Ladders and Fences 5 pieces

  • Bar 1 x 3 [Clip / Anti-Stud] Light Gray Part 4735 Element 4141579 or 473552 ×2
  • Lever Small Base with Black Lever Light Gray Part 298c02 Element 73588 ×2
  • Antenna 1 x 4 with Rounded Top Trans-Red Part 3957a Element 6065498 or 4106520 ×1

Plates 3 pieces

  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×2

Bricks Special 2 pieces

  • Brick Special 1 x 2 x 2/3 with Studs on Sides Light Gray Part 4595 Element 459502 ×2

Plates Wedged 2 pieces

  • Wedge Plate 8 x 4 Wing Right without Stud Notch Blue Part 3934a ×1
  • Wedge, Plate 8 x 4 Wing Left without Underside Stud Notch Blue Part 3933a ×1

Tubes and Hoses 2 pieces

  • Flexible Hose 8.5L with Tabless Ends (Ends same color as Tube) Trans-Yellow Part 73590c01a ×2

Minifig Accessories 1 piece

  • Equipment Camera with Side Sight [aka Space Gun] Light Gray Part 4360 Element 4143342 or 436002 ×1

Minifigures 1 figure

  • Classic Spaceman, White with Airtanks (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