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.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
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 Pin Connector Round [Slotted]Light Bluish Gray ×1Flat Silver ×2Light Bluish Gray is lighter than Flat Silver.
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]Light Bluish Gray ×7Flat Silver ×1Light Bluish Gray is lighter than Flat Silver.
Brick Curved 2 x 1 No Studs [1/2 Bow]Black ×2Dark Blue ×2Black is yellower and darker than Dark Blue.
Plate 1 x 1Black ×2Dark Blue ×2Black is yellower and darker than Dark Blue.
Technic Axle and Pin Connector Angled #1Black ×4Dark Blue ×3Black is yellower and darker than Dark Blue.
Technic Beam 1 x 2 ThinBlack ×37Dark Blue ×10Black is yellower and darker than Dark Blue.
26 more look-alike pairs
Technic Beam 1 x 3 ThickBlack ×6Dark Blue ×11Black is yellower and darker than Dark Blue.
Technic Beam 1 x 9 ThickBlack ×6Dark Blue ×6Black is yellower and darker than Dark Blue.
Technic Beam 2 x 3 L-Shape with Quarter Ellipse ThickBlack ×2Dark Blue ×10Black is yellower and darker than Dark Blue.
Technic Beam 2 x 4 L-Shape ThickBlack ×7Dark Blue ×8Black is yellower and darker than Dark Blue.
Technic Beam 3 x 5 L-Shape ThickBlack ×4Dark Blue ×6Black is yellower and darker than Dark Blue.
Technic Panel 3 x 7 x 1Black ×4Dark Blue ×9Black is yellower and darker than Dark Blue.
Technic Panel Curved 3 x 13 x 2 Tapered, Left #52Black ×1Dark Blue ×1Black is yellower and darker than Dark Blue.
Technic Panel Curved 3 x 13 x 2 Tapered, Right #53Black ×1Dark Blue ×1Black is yellower and darker than Dark Blue.
Technic Panel Curved 5 x 13 x 2 Tapered, Left #50Black ×2Dark Blue ×1Black is yellower and darker than Dark Blue.
Technic Panel Curved 5 x 13 x 2 Tapered, Right #51Black ×2Dark Blue ×1Black is yellower and darker than Dark Blue.
Technic Panel Fairing #21 5L Small Smooth, Side BBlack ×4Dark Blue ×3Black is yellower and darker than Dark Blue.
Technic Panel Fairing #22 5L Small Smooth, Side ABlack ×4Dark Blue ×3Black is yellower and darker than Dark Blue.
Technic Panel Fairing #7 3L Very Small Smooth, Side ABlack ×3Dark Blue ×2Black is yellower and darker than Dark Blue.
Technic Panel Fairing #8 3L Very Small Smooth, Side BBlack ×3Dark Blue ×2Black is yellower and darker than Dark Blue.
Technic Panel Fairing 2 x 1 x 1Black ×8Dark Blue ×2Black is yellower and darker than Dark Blue.
Technic Panel Fairing 2 x 3 x 1Black ×4Dark Blue ×8Black is yellower and darker than Dark Blue.
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge]Black ×2Dark Blue ×16Black is yellower and darker than Dark Blue.
Technic Axle Connector with Axle Hole [Reinforced]Black ×4Dark Bluish Gray ×8Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector PerpendicularBlack ×2Dark Bluish Gray ×11Black is darker than Dark Bluish Gray.
Technic Beam 1 x 3 ThickBlack ×6Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 ThickBlack ×17Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 Thick with Alternating HolesBlack ×6Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Beam 2 x 4 L-Shape ThickBlack ×7Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Beam 3 x 3 T-Shape ThickBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Beam 3 x 5 L-Shape ThickBlack ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Pin Connector Hub with 2 AxlesBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
LEGO's request form asks for the set number (42206) and each piece's element ID, both listed above.
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Piece checklist
Technic Pins
613 pieces
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L AxleBlackPart 18651Element 6089119×30
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]BlackPart 65304Element 6321745×38
Technic Pin with Friction Ridges Lengthwise with No Center SlotsBlackPart 61332Element 62798754 spares in the box×245
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×87
Technic Pin Long with Friction Ridges Lengthwise, 1 Center SlotBluePart 42924Element 6299413×119
Technic Pin 1/2 with FrictionDark Bluish GrayPart 89678Element 63956352 spares in the box×34
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]Flat SilverPart 65304Element 6287673Also in Light Bluish Gray×1
Technic Axle TowballLight Bluish GrayPart 2736Element 6443149 or 4211375×3
Technic Pin Long 3l with Stop and HoleLight Bluish GrayPart 77765Element 6338962×11
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]Light Bluish GrayPart 65304Element 6321747Also in Flat Silver×7
Technic Pin without Friction Ridges LengthwiseLight Bluish GrayPart 3673Element 4211807 or 36731941 spare in the box×2
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L AxleRedPart 11214Element 6209519×22
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]RedPart 65304Element 6347789×2
Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin HoleRedPart 66906Element 6360104×10
Technic Pin 3/4TanPart 32002Element 6663097 or 60139381 spare in the box×2
Technic Beams
263 pieces
Technic Beam 1 x 11 ThickBlackPart 32525Element 6029578 or 4534909×2
Technic Beam 1 x 15 ThickBlackPart 32278Element 4542573 or 4128603×9
Technic Beam 1 x 2 ThinBlackPart 41677Element 6338428 or 4167726Also in Dark Blue×37
Technic Beam 1 x 3 ThickBlackPart 32523Element 4142822 or 3252326Also in Dark Bluish GrayAlso in Dark Blue×6
Technic Beam 1 x 3 ThinBlackPart 6632Element 6331723 or 4107828×7
Technic Beam 1 x 5 ThickBlackPart 32316Element 4142135 or 4140429Also in Dark Bluish Gray×17
Technic Beam 1 x 5 Thin with Axle Holes on EndsBlackPart 11478Element 6327028 or 6030286×6
Technic Beam 1 x 6 ThinBlackPart 32063Element 6163980 or 4114634×2
Technic Beam 1 x 7 ThickBlackPart 32524Element 4495935 or 4155458×7
Technic Beam 1 x 7 Thick with Alternating HolesBlackPart 2391Element 6435016Also in Dark Bluish Gray×6
Technic Beam 1 x 9 Bent (6 - 4) ThickBlackPart 6629Element 6279881 or 4119800×3
Technic Beam 1 x 9 ThickBlackPart 40490Element 4645732 or 4542788Also in Dark Blue×6
Technic Beam 2 x 3 L-Shape with Quarter Ellipse ThickBlackPart 71708Element 6326047Also in Dark Blue×2
Technic Beam 2 x 4 L-Shape ThickBlackPart 32140Element 6271825 or 4120017Also in Dark Bluish GrayAlso in Dark Blue×7
Technic Beam 2 x 5 L-Shape with Quarter Ellipse ThickBlackPart 80286Element 6407066 or 6378466×2
Technic Beam 3 x 3 T-Shape ThickBlackPart 60484Element 4552347 or 4535771Also in Dark Bluish Gray×2
Technic Beam 3 x 5 L-Shape ThickBlackPart 32526Element 4142823 or 3252626Also in Dark Bluish GrayAlso in Dark Blue×4
Technic Beam 3 x 5 L-Shape Thick with Alternating HolesBlackPart 2477Element 6408182×12
Technic Beam Triangle Thin [Type II]BlackPart 99773Element 6331437 or 6010864×6
Technic Connector Beam 3 x 3BlackPart 39793Element 6265644×2
Technic Beam 1 x 2 Thick with Pin Hole and Axle HoleDark BluePart 60483Element 6344867 or 6233765×22
Technic Beam 1 x 2 ThinDark BluePart 41677Element 6437884 or 4165428Also in Black×10
Technic Beam 1 x 3 ThickDark BluePart 32523Element 6434419 or 6302341Also in Black×11
Technic Beam 1 x 9 ThickDark BluePart 40490Element 6434420Also in Black×6
Technic Beam 2 x 3 L-Shape with Quarter Ellipse ThickDark BluePart 71708Element 6434564Also in Black×10
Technic Beam 2 x 4 L-Shape ThickDark BluePart 32140Element 6271839 or 6217682Also in Black×8
Technic Beam 3 x 5 L-Shape ThickDark BluePart 32526Element 6217683 or 6059010Also in Black×6
Technic Beam 1 x 13 ThickDark Bluish GrayPart 41239Element 4522937 or 4261932×2
Technic Beam 1 x 15 Thick with Alternating HolesDark Bluish GrayPart 71710Element 6396963×1
Technic Beam 1 x 3 ThickDark Bluish GrayPart 32523Element 32523199 or 4210751Also in Black×1
Technic Beam 1 x 4 ThinDark Bluish GrayPart 32449Element 6327561 or 4210749×4
Technic Beam 1 x 5 ThickDark Bluish GrayPart 32316Element 32316199 or 4210686Also in Black×3
Technic Beam 1 x 7 Thick with Alternating HolesDark Bluish GrayPart 2391Element 6432397Also in Black×1
Technic Beam 2 x 4 L-Shape ThickDark Bluish GrayPart 32140Element 6271830 or 4210667Also in Black×4
Technic Beam 3 x 3 T-Shape ThickDark Bluish GrayPart 60484Element 4552349 or 4535773Also in Black×2
Technic Beam 3 x 5 L-Shape ThickDark Bluish GrayPart 32526Element 4210753Also in Black×2
Technic Beam 1 x 3 ThickLight Bluish GrayPart 32523Element 4211655×6
Technic Beam 1 x 5 ThinLight Bluish GrayPart 32017Element 4503416 or 4211554×2
Technic Beam 1 x 7 ThickLight Bluish GrayPart 32524Element 4495930 or 4211665×1
Tile Special Round 2 x 2 with HoleBlackPart 15535Element 6143850×1
Tile Special 1 x 2 Grille with Bottom GrooveTrans-RedPart 2412bElement 6250158 or 4190187×1
Tubes and Hoses
2 pieces
Axle Hose, Soft 19LBlackPart 32235Element 6139205 or 4121650×2
Minifig Accessories
1 piece
Equipment Hose Nozzle / Gun with Side String Hole SimplifiedLight Bluish GrayPart 60849Element 6641461 or 45158971 spare in the box×1
Tiles Round and Curved
1 piece
Tile Round 1 x 2BlackPart 1126Element 6507792 or 6439515×1
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.
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.