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.
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge]Light Bluish GrayPart 65487Element 6282142×2
Technic Pin Connector Round [Slotted]Light Bluish GrayPart 62462Element 6173127 or 4526985Also in Flat Silver×1
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 Beam 1 x 2 ThickWhitePart 43857Element 6215107 or 4227695×2
Technic Driving Ring ConnectorWhitePart 18948Element 6276052 or 6100932×1
Technic Pin Connector Round 1L [Beam]WhitePart 18654Element 6550155 or 61771142 spares in the box×14
Tan
10 pieces
Technic Engine Crankshaft CenterTanPart 2854Element 6355727 or 6013937×2
Technic Gear 12 Tooth BevelTanPart 6589Element 4565452 or 4514556×5
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]TanPart 18575Element 6346517 or 6084724×1
Technic Pin 3/4TanPart 32002Element 6663097 or 60139381 spare in the box×2
Flat Silver
7 pieces
Plate Round 1 x 1 with Solid StudFlat SilverPart 6141Element 46336911 spare in the box×4
Technic Pin Connector Round [Slotted]Flat SilverPart 62462Element 6245499 or 6054858Also in Light Bluish Gray×2
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
Dark Tan
6 pieces
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×6
Trans-Red
3 pieces
Tile 1 x 4 with GrooveTrans-RedPart 2431Element 6510184 or 6390369×2
Tile Special 1 x 2 Grille with Bottom GrooveTrans-RedPart 2412bElement 6250158 or 4190187×1
Pearl Titanium
2 pieces
Technic Axle Connector 2 x 3 QuadruplePearl TitaniumPart 11272Element 6251539 or 6022718×2
[No Color/Any Color]
2 pieces
Sticker Sheet 1 for Set 42206-1[No Color/Any Color]Part 10110650Element 6522702×1
Sticker Sheet 2 for Set 42206-1[No Color/Any Color]Part 10113609Element 6547064×1
Technic Gear 20 Tooth with Clutch on Both SidesGreenPart 81346Element 6391159×1
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.