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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.

Excavator

Checking

8851 Excavator

362 pieces in 68 part and color combinations.

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

Black 201 pieces

  • Hose, Pneumatic 4mm D. 15L / 12cm Black Part 5102c15 ×1
  • Hose, Pneumatic 4mm D. 30L / 24.0cm Black Part 5102c30 Element 6119444 ×1
  • Hose, Pneumatic 4mm D. 50L / 400mm Black Part 5102c50 Element 6319328 ×1
  • Hose, Pneumatic 4mm D. 5L / 4cm Black Part 5102c05 Element 6449541 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×4
  • Plate 2 x 6 Black Part 3795 Element 379526 ×2
  • Plate 2 x 8 Black Part 3034 Element 303426 ×2
  • Rubber Band Medium (Square Cross Section) Thin Cut Black Part 70012 Element 70012 ×2
  • Technic Axle 10 Black Part 3737 Element 373726 ×1
  • Technic Axle 10 Threaded Black Part 3737b ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×6
  • Technic Axle 6 Black Part 3706 Element 370626 ×4
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Black Part 3703 Element 370326 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×6
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×4
  • Technic Brick 1 x 6 [5 Pin Holes] Black Part 3894 Element 389426 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Black Part 3702 Element 370226 ×2
  • Technic Link Tread Black Part 3873 Element 387326 ×110
  • Technic Pin with Friction Ridges Lengthwise, without Center Slots Black Part 4459 ×41
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×3
  • Technic Plate 2 x 8 [7 Holes] Black Part 3738 Element 373826 ×2
  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×1

Light Gray 91 pieces

  • Hose, Pneumatic 4mm D. 10L / 8cm Light Gray Part 5102c10 ×2
  • Hose, Pneumatic 4mm D. 5L / 4cm Light Gray Part 5102c05 ×7
  • Hose, Pneumatic 4mm D. 7.5L / 6cm Light Gray Part 5102c07.5 ×1
  • Plate 1 x 6 Light Gray Part 3666 Element 366602 ×1
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×1
  • Plate 4 x 4 Light Gray Part 3031 Element 4243813 or 303102 ×1
  • Pneumatic Switch with Top Studs Light Gray Part 75215 Element 4190775 or 75215 ×3
  • Pneumatic T-Piece (T Bar) [Old Style] Light Gray Part 4697a 1 spare in the box ×4
  • Technic Axle Nut Light Gray Part 4698 ×4
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 1 spare in the box ×8
  • Technic Brick 1 x 12 [11 Pin Holes] Light Gray Part 3895 Element 4195006 or 389502 ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Light Gray Part 3703 Element 370302 ×6
  • Technic Brick 1 x 2 [1 Pin Hole] Light Gray Part 3700 Element 370002 ×1
  • Technic Brick 1 x 6 [5 Pin Holes] Light Gray Part 3894 Element 389402 ×4
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×15
  • Technic Bush 1/2 Toothed Type I [+ Opening] Light Gray Part 4265a Element 426502 1 spare in the box ×10
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×4
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×4
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 1 spare in the box ×4
  • Technic Plate 1 x 4 with Toothed Ends Light Gray Part 4263 Element 4225508 or 4189319 ×6
  • Technic Pneumatic Distribution Block 2 x 4 [Complete Assembly] Light Gray Part 4692c01 ×1

Red 66 pieces

  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×2
  • Brick 2 x 3 Red Part 3002 Element 300271 or 300221 ×1
  • Brick 2 x 4 Red Part 3001 Element 300121 ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×10
  • Plate 1 x 4 Red Part 3710 Element 371021 ×10
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 1 x 8 Red Part 3460 Element 346021 ×2
  • Plate 2 x 10 Red Part 3832 Element 383221 ×1
  • Plate 2 x 3 Red Part 3021 Element 302121 ×4
  • Plate 2 x 4 Red Part 3020 Element 302021 ×3
  • Plate 2 x 6 Red Part 3795 Element 379521 ×2
  • Plate 2 x 8 Red Part 3034 Element 303421 ×2
  • Plate 4 x 6 Red Part 3032 Element 303221 ×1
  • Plate 6 x 14 Red Part 3456 Element 4179193 or 345621 ×1
  • Pneumatic Pump Old Style Red Part 4701c01 ×1
  • Technic Brick 1 x 12 [11 Pin Holes] Red Part 3895 Element 389521 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×6
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×3
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×6
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×2
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×1
  • Technic Plate 2 x 8 [7 Holes] Red Part 3738 Element 373821 ×2

Yellow 4 pieces

  • Pneumatic Cylinder with 1 Inlet Medium (48mm) Yellow Part 4688c01 ×3
  • Technic Digger Bucket 8 x 6 Yellow Part 4700 ×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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