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 1,027 pieces. This inventory comes from a separate parts catalog and lists 1,032; 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 Axle Connector Ridged [with x Hole x Orientation]Black ×7Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector PerpendicularBlack ×10Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin HolesBlack ×4Dark Bluish Gray ×7Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector Perpendicular DoubleBlack ×5Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector Perpendicular Double SplitBlack ×15Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Technic Beam 1 x 11 ThickBlack ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
9 more look-alike pairs
Technic Beam 1 x 3 ThinBlack ×6Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Beam 1 x 4 ThinBlack ×6Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 ThinBlack ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 Bent (4 - 4) ThickBlack ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 ThickBlack ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Beam 2 x 4 L-Shape ThickBlack ×12Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Pin Connector Perpendicular LongBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Pin Connector Round [No Slot]Black ×6Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]Black ×16Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening]BlackPart 32269Element 4177430×3
Technic Gear 8 ToothBlackPart 3647Element 41201811 spare in the box×1
Technic Gear Rack 1 x 4BlackPart 3743Element 6457282 or 4205760×1
Technic Panel Fairing # 5 Small Short, Large Hole, Side ABlackPart 32527Element 4143417×1
Technic Panel Fairing # 6 Small Short, Large Hole, Side BBlackPart 32528Element 4143419×1
Technic Pin Connector Perpendicular LongBlackPart 32557Element 4143466Also in Dark Bluish Gray×2
Technic Pin Connector Round [No Slot]BlackPart 75535Element 75619Also in Dark Bluish Gray×6
Technic Pin Double with Axle HoleBlackPart 32138Element 4130597 or 4119589×4
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]BlackPart 32054Element 4140801 or 4107742Also in Dark Bluish Gray×16
Technic Pin Long with Friction Ridges Lengthwise, 2 Center SlotsBlackPart 6558Element 6558261 spare in the box×55
Technic Pin with Friction Ridges Lengthwise and Center SlotsBlackPart 2780Element 4121715 or 2780263 spares in the box×183
Tyre 62.4 x 20BlackPart 32019Element 6411639 or 4547373×6
Light Bluish Gray
238 pieces
Hose, Pneumatic 4mm D. 38.75L / 31cmLight Bluish GrayPart 5102c38.75×1
Hose, Pneumatic 4mm D. 43.75L / 35cmLight Bluish GrayPart 5102c43.75×1
Hose, Pneumatic 4mm D. 6.25L / 5cmLight Bluish GrayPart 5102c06.25×1
Large Figure Shield Holder with Technic AxleLight Bluish GrayPart 47474Element 4244143 or 4220895×4
Large Figure Weapon, Claw Hook with AxleLight Bluish GrayPart 32551Element 4234608×1
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Light Bluish GrayPart 4032aElement 4211475×4
Pneumatic T-Piece (T Bar) [New Style]Light Bluish GrayPart 4697bElement 42115081 spare in the box×1
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]RedPart 32054Element 4140806 or 4125198×9
Tan
18 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×12
Technic Beam 3 x 5 L-Shape ThickTanPart 32526Element 4234421 or 3252605×4
Technic Pin Connector Round [No Slot]TanPart 75535Element 4235599 or 4129557×2
Yellow
12 pieces
Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm)YellowPart 47225Element 4563144 or 4205293×2
Pneumatic Pump New Style with Black TopYellowPart 2797c02Element 4563134 or 74720×1
Technic Engine Piston RoundYellowPart 2851Element 4112203 or 285124×6
Technic Pin Connector Plate with One Hole (Single on Bottom)YellowPart 32529Element 4237145×2
Tile 1 x 4 with GrooveYellowPart 2431Element 243124×1
Trans-Clear
10 pieces
Plate Round 1 x 1 with Solid StudTrans-ClearPart 6141Element 6514052 or 62400302 spares in the box×8
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-ClearPart 2654Element 6581772 or 6163901×2
Trans-Orange
4 pieces
Plate Round 1 x 1 with Solid StudTrans-OrangePart 6141Element 6514059 or 62402272 spares in the box×4
Trans-Red
4 pieces
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×4
Trans-Yellow
4 pieces
Brick Round 2 x 2 with Axle HoleTrans-YellowPart 3941Element 6514285 or 6273155×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-YellowPart 2654Element 6581773 or 6171728×2
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.