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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.

Mobile Rocket Launcher

Checking

897 Mobile Rocket Launcher

67 pieces in 33 part and color combinations, plus 2 minifigures.

LEGO counts 76 pieces. This inventory comes from a separate parts catalog and lists 77, including the 10 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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

Wheels and Tyres 15 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×10
  • Plate Special 2 x 2 with Wheels Red Light Gray Part 122c01 ×5

Plates 14 pieces

  • Plate 1 x 1 Light Gray Part 3024 Element 302402 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×3
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×1
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×3
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×3
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×1
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×1

Bricks Round and Cones 11 pieces

  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×2
  • Cone 2 x 2 x 2, Solid Stud Black Part 3942a ×1
  • Brick Round 1 x 1 Open Stud Trans-Green Part 3062b Element 6514234 or 6238046 ×1
  • Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×6
  • Cone 2 x 2 x 2, Solid Stud White Part 3942a ×1

Plates Special 8 pieces

  • Bracket 2 x 2 - 2 x 2 Light Gray Part 3956 Element 395602 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×2
  • Plate Special 2 x 2 with Towball Light Gray Part 3729 Element 372902 ×1
  • Plate Special 2 x 2 with Towball Socket, Short, 4 Slots Light Gray Part 3730 Element 373002 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Red Part 3794a ×2

Transportation - Land 6 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×1
  • Wheel Arch, Mudguard 2 x 4 [Smooth] Light Gray Part 3787 ×5

Hinges, Arms and Turntables 5 pieces

  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×1
  • Hinge Brick 1 x 2 Top Plate Thin Light Gray Part 3938 Element 393802 ×1
  • Hinge Plate 2 x 9 with Hole Close to Hinge [Complete Assembly] Light Gray Part 3324ac01 Element 4106906 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Turntable 2 x 2 Plate, Base Light Gray Part 3680 Element 4242118 or 368002 ×1

Transportation - Sea and Air 3 pieces

  • Brick Special 1 x 1 with 3 Speakers / Loudspeakers / Space Positioning Rockets Light Gray Part 3963 Element 396302 ×1
  • Tail 4 x 2 x 2 Light Gray Part 3479 Element 347952 or 347902 ×2

Bars, Ladders and Fences 1 piece

  • Antenna 1 x 4 with Rounded Top Light Gray Part 3957a Element 395702 ×1

Bricks Sloped 1 piece

  • Brick Sloped 45° 2 x 2 with Computer Screen Print Light Gray Part 3039pr0026 ×1

Minifig Accessories 1 piece

  • Equipment Radio [Compact Handle] Black Part 3962a ×1

Minifig Neckwear 1 piece

  • Minifig Neckwear Airtanks Light Gray Part 3838 Element 4212314 ×1

Plates Round Curved and Dishes 1 piece

  • Dish 4 x 4 Inverted [Radar] Light Gray Part 3960 Element 4143013 or 396002 ×1

Minifigures 2 figures

  • Classic Spaceman, Red with Airtanks (3842a Helmet) Minifigure, checked as a whole figure ×1
  • Classic Spaceman, White with Airtanks (3842a 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.

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