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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.

Checking

42082 Rough Terrain Crane

4,056 pieces in 264 part and color combinations.

LEGO counts 4,057 pieces. This inventory comes from a separate parts catalog and lists 4,056; 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.

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. 5 parts in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. This set comes with 31 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 ×60 Dark Bluish Gray ×33 Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector Angled #2 - 180° Black ×12 Dark Bluish Gray ×4 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 Thick Black ×33 Dark Bluish Gray ×4 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 9 Thick Black ×13 Dark Bluish Gray ×11 Black is darker than Dark Bluish Gray.
Technic Beam 3 x 3 T-Shape Thick Black ×1 Dark Bluish Gray ×20 Black is darker than Dark Bluish Gray.

Piece checklist

Technic Bushes 76 pieces

Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×4
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 2 spares in the box ×19
Technic Bush Red Part 3713 Element 6271820 or 4227155 4 spares in the box ×37
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×16

Tiles Round and Curved 43 pieces

Tile Round 1 x 1 Black Part 98138 Element 6284070 or 6139403 1 spare in the box ×35
Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×6
Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×2

Technic Beams Special 38 pieces

Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Black Part 64179 Element 6016154 ×6
Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced Light Bluish Gray Part 33299b Element 4563045 ×4
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×2
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×15
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Red Part 14720 Element 6534281 or 6185105 ×11

Wheels and Tyres 33 pieces

Train Wheel Small, hole notched for wheels holder pin Black Part 50254 Element 4295370 or 4227006 ×8
Tyre 14 x 6 Solid Smooth Black Part 50951 Element 4246901 ×4
Tyre 24 x 14 Shallow Tread (Tread Small Hub), Band Around Center of Tread Black Part 89201 Element 6132299 or 4639695 ×1
Tyre 94.3 x 38 R Black Part 92912 Element 4610381 ×4
Wheel 18mm x 14mm with Axle Hole, Fake Bolts and Shallow Spokes Black Part 55982 Element 4517737 ×1
Technic Wedge Belt Wheel [aka Pulley] Dark Bluish Gray Part 4185 Element 6321744 or 4587275 ×2
Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×6
Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Light Bluish Gray Part 13971 Element 6359807 or 6044729 ×3
Wheel 56 x 34 Technic Racing Medium with 6 Pin Holes Red Part 15038 Element 6276853 or 6149984 ×4

Plates Round Curved and Dishes 29 pieces

Dish 6 x 6 Inverted (Radar) with Solid Studs Black Part 44375b Element 6058341 ×4
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×1
Plate Round 4 x 4 with Pin Hole Black Part 60474 Element 4515350 ×4
Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×16
Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Orange Part 2654 Element 6513980 or 6171727 ×1
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×1

Bars, Ladders and Fences 23 pieces

Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 1 spare in the box ×2
Bar 3L Black Part 87994 Element 6185316 or 6093525 1 spare in the box ×7
Bar 6L with Stop Ring Black Part 63965 Element 6170421 or 6081988 ×1
Bar Holder with Clip Black Part 11090 Element 6315887 or 6015891 ×1
Bar 2L with Towball Dark Bluish Gray Part 22484 Element 6364352 or 6360117 ×8
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye Trans-Orange Part 58176 Element 6507868 or 6171764 ×4

Technic Special 21 pieces

Technic Ball Joint with Through Axle Hole Black Part 53585 Element 4286267 ×2
Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×6
Technic Linear Actuator Mini with Dark Bluish Gray Head and Orange Axle Light Bluish Gray Part 92693 Element 6221464 or 4612100 ×4
Technic Linear Actuator with Dark Bluish Gray Ends [Improved Version] Light Bluish Gray Part 61927b Element 6153715 or 4638507 ×2
Technic Changeover Catch - New Style Red Part 51149 Element 6313493 ×4
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Red Part 41669 Element 4185661 ×3

Technic Bricks 15 pieces

Technic Pin Connector Block 1 x 5 x 3 Black Part 32333 Element 6271358 or 4141810 ×2
Technic Brick 1 x 12 [11 Pin Holes] Dark Bluish Gray Part 3895 Element 4210963 ×2
Technic Brick 1 x 16 [15 Pin Holes] Dark Bluish Gray Part 3703 Element 4256828 ×1
Technic Brick 1 x 14 [13 Pin Holes] Light Bluish Gray Part 32018 Element 4211705 ×1
Technic Brick 1 x 12 [11 Pin Holes] Red Part 3895 Element 389521 ×4
Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×4
Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×1

Bricks Curved 12 pieces

Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes Black Part 88930 Element 4587844 ×3
Brick Curved Inverted 2 x 1 Black Part 24201 Element 6147050 ×6
Brick Curved 4 x 1 Double, No Studs Dark Bluish Gray Part 93273 Element 4648256 ×2
Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Dark Bluish Gray Part 11153 Element 6042955 ×1

Plates Special 10 pieces

Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Black Part 10247 Element 6061032 ×3
Plate Special 2 x 2 with 2 Pins Dark Bluish Gray Part 15092 Element 6284702 or 6066952 ×2
Plate Special 2 x 2 with Pin on Bottom Light Bluish Gray Part 2476a Element 6276848 or 4237084 ×4
Plate Special Round 2 x 2 with Center Stud (Jumper Plate) White Part 18674 Element 6615555 or 6093053 ×1

Panels 8 pieces

Panel 1 x 2 x 1 [Rounded Corners] Tan Part 4865b Element 6146221 ×4
Panel 1 x 2 x 1 with Rounded Corners and 2 Sides Tan Part 23969 Element 6248495 or 6173986 ×4

String, Bands and Reels 7 pieces

Chain 6L [5 Links] Dark Bluish Gray Part 92338 Element 6311445 or 4600437 ×2
String Cord Medium Thickness (1mm) 300cm Dark Bluish Gray Part 37597c300 Element 6225933 ×1
Chain 16L [21 Links] Light Bluish Gray Part 60169 Element 6292172 or 4512049 ×2
Rubber Belt Small [15mm ID] [Round Cross Section] White Part 85543 Element 6699001 or 4580665 ×2

Bricks Sloped 4 pieces

Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Orange Part 54200 Element 6245265 or 4244369 ×4

Bricks Round and Cones 2 pieces

Brick Round 2 x 2 with Axle Hole Trans-Orange Part 3941 Element 6514283 or 6273154 ×1
Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×1

Electronics 2 pieces

Battery Box, Power Functions 4 x 11 x 7 with Orange Switch and Dark Bluish Gray Covers [Complete Assembly] [New Version] Light Bluish Gray Part 16511 Element 6368436 or 6257768 ×1
Motor, Large, Power Functions with Dark Bluish Gray Bottom Light Bluish Gray Part 99499 Element 6263044 or 6211504 ×1

Minifig Shields, Weapons, & Tools 2 pieces

Tool Hammer / Mallet Large Black Part 4522 Element 452226 ×1
Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1

Tubes and Hoses 2 pieces

Axle Hose, Soft 12L Black Part 32200 Element 4501290 or 4121647 ×2

Pneumatics 1 piece

Pneumatic Hose Connector with Axle Connector Dark Bluish Gray Part 99021 Element 6265669 or 6020189 ×1

Stickers 1 piece

Sticker Sheet for Set 42082-1 [No Color/Any Color] Part 38739 Element 6227119 ×1

Tiles Special 1 piece

Tile Special Round 2 x 2 with Hole Black Part 15535 Element 6143850 ×1

Transportation - Sea and Air 1 piece

Propeller 8 Blade 5 Diameter Orange Part 41530 Element 6325301 or 6170793 ×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

42082 Rough Terrain Crane

Before you call it missing

Look-alike colors in this set

Your missing list

Piece checklist

Technic Pins 1,490 pieces

Technic Beams 732 pieces

Technic Connectors 728 pieces

Technic Axles 425 pieces