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.
Technic Steering Knuckle Arm with Ball JointLight GrayPart 6572Element 4154763 or 657202×8
Technic Steering Wheel Small (3 Studs Diameter)Light GrayPart 2819Element 4113032 or 281902×1
Tile Special 1 x 2 Grille with Bottom GrooveLight GrayPart 2412bElement 241202×8
Wheel 30.4 x 20 with 3 PinholesLight GrayPart 44292Element 4184287×4
Wheel 43.2 x 26 Technic Racing Small with 3 PinholesLight GrayPart 41896Element 4180144×4
Tan
17 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×17
Red
14 pieces
Brick Round 1 x 1 Open StudRedPart 3062bElement 306221×4
Plate 1 x 3RedPart 3623Element 362321×2
Plate 2 x 3RedPart 3021Element 302121×4
Plate 2 x 4RedPart 3020Element 302021×2
Plate Special 1 x 2 Side Handle [Free Ends]RedPart 2540Element 4140585 or 254021×1
Propeller 3 Blade 3 Diameter with Axle CrossRedPart 6041Element 6173893 or 4163288×1
Blue
8 pieces
Technic Pin 1/2 without Friction RidgesBluePart 4274Element 41430051 spare in the box×8
Trans-Neon Orange
8 pieces
Plate Round 1 x 1 with Solid StudTrans-Neon OrangePart 6141Element 6240218 or 30057471 spare in the box×6
Tile 1 x 2 with GrooveTrans-Neon OrangePart 3069bElement 4204537×2
Trans-Clear
7 pieces
Panel 1 x 2 x 3 - Solid StudsTrans-ClearPart 2362a×1
Panel 1 x 4 x 3 [Hollow Studs]Trans-ClearPart 4215bElement 4129534×2
Plate 1 x 2Trans-ClearPart 3023Element 6514001 or 6240204×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-ClearPart 2654Element 6581772 or 6163901×2
Trans-Red
6 pieces
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×2
Tile Special 1 x 2 Grille with Bottom GrooveTrans-RedPart 2412bElement 6250158 or 4190187×4
Pearl Light Gray
4 pieces
Hose, Ribbed 7mm D. 2L / 1.6cmPearl Light GrayPart 78c02Element 4495192 or 4275384×2
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Pearl Light GrayPart 41669Element 4284480 or 4177440×2
Trans-Brown
2 pieces
Windscreen 5 x 2 x 1 2/3Trans-BrownPart 6070Element 4204624×2
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.