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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.

Hydroplane Racer

Checking

42045 Hydroplane Racer

180 pieces in 60 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 53 pieces

  • Axle Hose, Soft 7L Black Part 32580 Element 6132744 ×2
  • Propeller 3 Blade 3 Diameter with Axle Cross Black Part 6041 Element 604126 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×4
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×1
  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×2
  • Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×2
  • Technic Beam 3 x 3 L-Shape Thin Black Part 32056 Element 6271810 or 4112287 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×2
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×30
  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×2

Light Bluish Gray 38 pieces

  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×6
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×4
  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Bluish Gray Part 32184 Element 6276969 or 4211621 ×6
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×1
  • Technic Beam 3 x 0.5 Liftarm with Boss and Pin / Crank Light Bluish Gray Part 33299a Element 4211688 ×4
  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×1
  • Technic Engine Connecting Rod Light Bluish Gray Part 2852 Element 6000018 or 4655728 ×4
  • Technic Engine Cylinder without Side Slots, with Bottom Slots Light Bluish Gray Part 2850b Element 6514436 or 6383961 ×4
  • Technic Pin Connector Round [Slotted] Light Bluish Gray Part 62462 Element 6173127 or 4526985 ×1
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×4
  • Technic Wedge Belt Wheel [aka Pulley] Light Bluish Gray Part 4185 Element 6321743 or 4494222 ×2

White 28 pieces

  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×2
  • Technic Axle and Pin Connector Perpendicular White Part 6536 Element 6261372 or 4173670 ×8
  • Technic Beam 1 x 11 Thick White Part 32525 Element 6028103 or 4296265 ×2
  • Technic Beam 1 x 3 Thick White Part 32523 Element 6632140 or 4208160 ×4
  • Technic Beam 1 x 3 Thin White Part 6632 Element 6360038 or 4107826 ×2
  • Technic Beam 2 x 4 L-Shape Thick White Part 32140 Element 6271824 or 4118980 ×3
  • Technic Panel Fairing # 3 Small Smooth Long, Side A White Part 64683 Element 4547581 ×1
  • Technic Panel Fairing # 4 Small Smooth Long, Side B White Part 64391 Element 4547582 ×1
  • Technic Panel Fairing #17 Large Smooth, Side A White Part 64392 Element 6023994 or 4547031 ×1
  • Technic Panel Fairing #18 Large Smooth, Side B White Part 64682 Element 6023996 or 4547025 ×1
  • Technic Panel Fairing #5 Long Smooth, Side A White Part 64681 Element 4558802 ×1
  • Technic Panel Fairing #6 Long Smooth, Side B White Part 64393 Element 4558797 ×1
  • Wheel 31 x 15 Technic, 7 Pin Holes White Part 60208 Element 6524592 or 4512751 ×1

Blue 22 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Blue Part 2654 Element 4278276 or 4208686 ×2
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×5
  • Technic Beam 1 x 7 Thick Blue Part 32524 Element 4506043 or 4144285 ×2
  • Technic Beam 2 x 4 L-Shape Thick Blue Part 32140 Element 6271829 or 4168114 ×2
  • Technic Panel Curved 3 x 13 Blue Part 18944 Element 6239884 or 6133679 ×1
  • Technic Panel Curved and Bent 6 x 3 Blue Part 24116 Element 6268009 or 6133684 ×2
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×8

Yellow 13 pieces

  • Technic Axle 7 Yellow Part 44294 Element 6130009 ×1
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×6
  • Technic Engine Crankshaft Yellow Part 2853 Element 6640378 or 4119474 ×2
  • Technic Engine Piston Round Yellow Part 2851 Element 4112203 or 285124 ×4

Red 7 pieces

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×7

Tan 7 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×2
  • Technic Engine Crankshaft Center Tan Part 2854 Element 6355727 or 6013937 ×3
  • Technic Gear 20 Tooth Bevel Tan Part 32198 Element 6031962 or 4514557 ×1
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×1

Dark Bluish Gray 6 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Dark Bluish Gray Part 60483 Element 6265093 or 6006141 ×3
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×1
  • Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×1

Flat Silver 4 pieces

  • Technic Axle and Pin Connector, Perpendicular with Extension Flat Silver Part 53586 Element 6395637 or 6323657 ×4

Dark Tan 1 piece

  • Technic Axle 5 with Stop Dark Tan Part 15462 Element 6055631 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 42045-1 [No Color/Any Color] Part 24732 Element 6134889 ×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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