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 1,877 pieces. This inventory comes from a separate parts catalog and lists 1,879; 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.
Technic Pin Connector Round [No Slot]Light Bluish Gray ×2Metallic Silver ×8Light Bluish Gray is yellower than Metallic Silver.
Wheel 43.2 x 18 with Extended Axle StemLight Bluish Gray ×4Metallic Silver ×6Light Bluish Gray is yellower than Metallic Silver.
Technic Beam 1 x 13 ThickBlack ×9Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Beam 1 x 3 ThickBlack ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Technic Beam 1 x 3 ThinBlack ×10Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 ThickBlack ×4Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
1 more look-alike pair
Technic Beam 1 x 9 ThickBlack ×7Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Tile Special 1 x 2 Grille with Bottom GrooveMetallic SilverPart 2412bElement 6051422 or 4579833×29
Wheel 43.2 x 18 with Extended Axle StemMetallic SilverPart 32020Element 4296465Also in Light Bluish Gray×6
Trans-Yellow
17 pieces
Brick Round 2 x 2 with Axle HoleTrans-YellowPart 3941Element 6514285 or 6273155×8
Cone 1 x 1 [No Top Groove]Trans-YellowPart 4589Element 618844×3
Plate Round 1 x 1 with Solid StudTrans-YellowPart 6141Element 6514056 or 62402162 spares in the box×6
Yellow
13 pieces
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)YellowPart 3794a×2
Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm)YellowPart 47225Element 4563144 or 4205293×1
Pneumatic Pump New Style with Black TopYellowPart 2797c02Element 4563134 or 74720×1
Technic Beam 3 x 3 L-Shape ThinYellowPart 32056Element 6271812 or 4112289×2
Technic Engine Piston RoundYellowPart 2851Element 4112203 or 285124×6
Technic Reel 3 x 2YellowPart 32012Element 4297401 or 4120070×1
Trans-Clear
7 pieces
Plate 1 x 2Trans-ClearPart 3023Element 6514001 or 6240204×4
Plate Round 1 x 1 with Solid StudTrans-ClearPart 6141Element 6514052 or 62400301 spare in the box×2
Technic Shock Absorber 10L, Damped, Normal SpringTrans-ClearPart 76320c01Element 4142095×1
Tan
6 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×6
Trans-Red
4 pieces
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084502 spares in the box×2
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Trans-RedPart 41669Element 4163567×2
[No Color/Any Color]
1 piece
Sticker Sheet for Set 8285-1[No Color/Any Color]Part 56763Element 4297480×1
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.