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 Axle and Pin Connector PerpendicularBlack ×8Dark Blue ×22Black is yellower and darker than Dark Blue.
Technic Axle and Pin Connector Perpendicular Double Split [Reinforced]Black ×2Dark Blue ×6Black is yellower and darker than Dark Blue.
Technic Beam 1 x 15 ThickBlack ×1Dark Blue ×2Black is yellower and darker than Dark Blue.
Technic Beam 1 x 2 Thick with Pin Hole and Axle HoleBlack ×25Dark Blue ×24Black is yellower and darker than Dark Blue.
Technic Beam 1 x 3 ThickBlack ×4Dark Blue ×8Black is yellower and darker than Dark Blue.
Technic Beam 1 x 7 ThickBlack ×6Dark Blue ×2Black is yellower and darker than Dark Blue.
13 more look-alike pairs
Technic Beam 1 x 9 ThickBlack ×4Dark Blue ×3Black is yellower and darker than Dark Blue.
Technic Beam 2 x 4 L-Shape ThickBlack ×14Dark Blue ×9Black is yellower and darker than Dark Blue.
Technic Panel Fairing #21 5L Small Smooth, Side BBlack ×3Dark Blue ×6Black is yellower and darker than Dark Blue.
Technic Panel Fairing #22 5L Small Smooth, Side ABlack ×2Dark Blue ×6Black is yellower and darker than Dark Blue.
Technic Panel Fairing #7 3L Very Small Smooth, Side ABlack ×4Dark Blue ×5Black is yellower and darker than Dark Blue.
Technic Panel Fairing #8 3L Very Small Smooth, Side BBlack ×3Dark Blue ×5Black is yellower and darker than Dark Blue.
Technic Panel Fairing 2 x 1 x 1Black ×1Dark Blue ×3Black is yellower and darker than Dark Blue.
Technic Panel Fairing 2 x 3 x 1Black ×10Dark Blue ×14Black is yellower and darker than Dark Blue.
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge]Black ×12Dark Blue ×25Black is yellower and darker than Dark Blue.
Tile 1 x 4 with GrooveBlack ×2Dark Blue ×1Black is yellower and darker than Dark Blue.
Technic Beam 1 x 15 ThickBlack ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Beam 1 x 9 ThickBlack ×4Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Pin Connector Hub with 2 AxlesBlack ×1Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Brick Wedged, Curved 4 x 3 No Studs [Plain]BlackPart 64225Element 6009018 or 4539743×1
Brick Wedged, Curved 2 x 1 with Stud Notch LeftDark BluePart 29120Element 6214811×1
Brick Wedged, Curved 2 x 1 with Stud Notch RightDark BluePart 29119Element 6214812×1
Bricks Round and Cones
2 pieces
Brick Round 2 x 2 [Grill]BlackPart 92947Element 6024730×2
Bars, Ladders and Fences
1 piece
Bar 4L (Lightsaber Blade / Wand)Glow in Dark WhitePart 30374Element 6384681 or 6009094×1
Stickers
1 piece
Sticker Sheet for Set 42154-1[No Color/Any Color]Part 10101056Element 6415921×1
Transportation - Land
1 piece
Steering Wheel with 4 Studs on CenterBlackPart 67811Element 6299938×1
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.