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.

Checking

42113 Bell Boeing V-22 Osprey

1,636 pieces in 165 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.

Every bag and the box. Shake out each bag, check its corners and seams, and look inside the empty box.
Inside what you have built. Small pieces lodge inside tubes, under plates and between studs. Turn the model over and look.
The last few steps. Compare each recent step with its parts callout. A piece used in the wrong place earlier leaves you one short later.
Look-alike colors. 1 part in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. This set comes with 12 spare pieces, marked on each row of the checklist. One may be the piece you need.
The floor and your building area. Check under furniture, the chair and the edges of your building surface.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

Technic Axle Connector Smooth [with x Hole + Orientation] Black ×2 Dark Bluish Gray ×20 Black is darker than Dark Bluish Gray.

Piece checklist

Technic Bushes 31 pieces

Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 2 spares in the box ×17
Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×14

Wheels and Tyres 18 pieces

Tyre 17.5 x 6 with Shallow Staggered Treads and Middle Band Black Part 92409 Element 4617848 ×6
Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×8
Wheel 31 x 15 Technic, 7 Pin Holes Orange Part 60208 Element 6303441 ×4

Technic Special 11 pieces

Technic Cam Dark Bluish Gray Part 6575 Element 6575199 or 4210759 ×4
Technic Ball Joint Light Bluish Gray Part 32474 Element 6070731 or 4585707 ×1
Technic Linear Actuator Mini with Dark Bluish Gray Head and Orange Axle Light Bluish Gray Part 92693 Element 6221464 or 4612100 ×2
Technic Changeover Catch - New Style Red Part 51149 Element 6313493 ×4

Panels 8 pieces

Panel 1 x 2 x 1 with Rounded Corners and 2 Sides Black Part 23969 Element 6248496 or 6174845 ×8

Plates 8 pieces

Plate 2 x 4 Black Part 3020 Element 302026 ×2
Plate 1 x 2 Orange Part 3023 Element 4177932 or 4163009 ×2
Plate 2 x 3 Orange Part 3021 Element 4125278 ×4

Technic Beams Special 8 pieces

Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×5
Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick Light Bluish Gray Part 64178 Element 4540797 ×2
Technic Beam Frame 7 x 11 White Part 39794 Element 6247435 ×1

Plates Round Curved and Dishes 7 pieces

Plate Round 4 x 4 with Pin Hole Black Part 60474 Element 4515350 ×2
Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×1
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×4

Technic Steering, Suspension and Engine 6 pieces

Technic Universal Joint 3L [Complete Assembly] Light Bluish Gray Part 61903 Element 6335279 or 6321309 ×6

Bricks Special 4 pieces

Brick Special 1 x 1 with Headlight Orange Part 4070 Element 4521571 or 4212455 ×4

Plates Special 4 pieces

Plate Special 2 x 2 with 2 Pin Holes Light Bluish Gray Part 2817 Element 4211376 ×2
Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×2

Plates Wedged 4 pieces

Wedge Plate 4 x 2 Left Black Part 41770 Element 4161332 ×2
Wedge Plate 4 x 2 Right Black Part 41769 Element 4160869 ×2

Tiles Round and Curved 3 pieces

Tile Round 1 x 1 Trans-Green Part 98138 Element 6514194 or 6274742 1 spare in the box ×1
Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×2

Bricks Curved 2 pieces

Brick Curved 4 x 2 No Studs Orange Part 93606 Element 6054529 ×2

Bricks Round and Cones 2 pieces

Dome Hemisphere 4 x 4 Black Part 86500 Element 6252319 or 6174959 ×2

Electronics 2 pieces

Hub, Powered Up 2-Port (Non-Bluetooth) - Clip Opening Dark Bluish Gray Part 22167 Element 6214082 or 621408 ×1
Motor, Large, Powered Up Dark Bluish Gray Part 22169 Element 6545732 or 6456189 ×1

Tiles Special 2 pieces

Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×2

Stickers 1 piece

Sticker Sheet for Set 42113-1 [No Color/Any Color] Part 68302 Element 6303286 ×1

Tiles 1 piece

Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×1

Tubes and Hoses 1 piece

Axle Hose, Soft 16L Black Part 32202 Element 6057525 or 4121649 ×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.

LEGO Missing Piece Checker

42113 Bell Boeing V-22 Osprey

Before you call it missing

Look-alike colors in this set

Your missing list

Piece checklist

Technic Pins 641 pieces

Technic Beams 357 pieces

Technic Connectors 234 pieces

Technic Axles 161 pieces

Technic Panels 75 pieces