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.
LEGO counts 1,327 pieces. This inventory comes from a separate parts catalog and lists 1,326; 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.
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.
Plate Round 1 x 1 with Solid StudRed ×1Trans-Red ×2Trans-Red is see-through: hold the piece up to a light.
Tile 1 x 2 with GrooveLight Bluish GrayPart 3069bElement 4211414×1
Blue
78 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×78
Yellow
25 pieces
Plate Round 1 x 1 with Solid StudYellowPart 6141Element 6141241 spare in the box×1
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedYellowPart 32123bElement 6271167 or 32123242 spares in the box×10
Technic Engine Piston RoundYellowPart 2851Element 4112203 or 285124×12
Tile 1 x 2 with GrooveYellowPart 3069bElement 306924×2
Dark Bluish Gray
20 pieces
Technic Axle 3 with StudDark Bluish GrayPart 6587Element 6587199 or 6129590×7
Technic Engine Crankshaft CenterDark Bluish GrayPart 2854Element 6007058 or 4210987×5
Technic Gear 16 Tooth with Clutch [Toothed]Dark Bluish GrayPart 6542a×1
Technic Gear Differential, 24 -16 Tooth with Clutch on Both SidesDark Bluish GrayPart 6573Element 6573199 or 4211023×1
Technic Link 1 x 6 without StoppersDark Bluish GrayPart 32005aElement 4629920 or 4211026×6
Tan
17 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 41860171 spare in the box×1
Technic Beam 1 x 11.5 Double Bent ThickTanPart 32009Element 4508690 or 4140563×4
Technic Beam 1 x 3 ThickTanPart 32523Element 6404786 or 6124173×4
Technic Beam 1 x 9 Bent (7 - 3) ThickTanPart 32271Element 4508691 or 4140457×6
Technic Beam 1 x 9 ThickTanPart 40490Element 4505246×2
Pearl Light Gray
8 pieces
Hose, Ribbed 7mm D. 2L / 1.6cmPearl Light GrayPart 78c02Element 4495192 or 4275384×4
Wheel Cover 7 Spoke with Axle Hole - 56mm D. [Fits 44772]Pearl Light GrayPart 58088Element 4500915×4
Trans-Red
7 pieces
Brick Round 2 x 2 with Axle HoleTrans-RedPart 3941Element 6514289 or 6334501×2
Plate 1 x 2Trans-RedPart 3023Element 6514003 or 6240212×3
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the boxAlso in Red×2
Trans-Clear
4 pieces
Plate Round 1 x 1 with Solid StudTrans-ClearPart 6141Element 6514052 or 62400302 spares in the box×4
Trans-Neon Orange
2 pieces
Plate Round 1 x 1 with Solid StudTrans-Neon OrangePart 6141Element 6240218 or 30057471 spare in the box×2
[No Color/Any Color]
1 piece
Sticker Sheet for Set 8145-1[No Color/Any Color]Part 57860Element 4508659×1
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.