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 Knob WheelBlackPart 32072Element 6284188 or 4248204×4
Technic Beams Special
2 pieces
Technic Beam 1 x 3 with Ball Joint in MiddleDark Bluish GrayPart 98577Element 6001085×2
Technic Steering, Suspension and Engine
2 pieces
Technic Engine CrankshaftLight Bluish GrayPart 2853Element 6640384 or 4211609×2
Wheels and Tyres
2 pieces
Wheel Hard Plastic with Small Cleats and FlangesBlackPart 64712Element 4538782×2
Stickers
1 piece
Sticker Sheet for Set 44014-1[No Color/Any Color]Part 14092Element 6035612×1
Tiles Round and Curved
1 piece
Tile Round 2 x 2 with Bottom CrossWhitePart 4150Element 415051 or 415001×1
Tiles Special
1 piece
Tile Special 1 x 2 Grille with Bottom GrooveDark Bluish GrayPart 2412bElement 4210631×1
Windscreens and Fuselage
1 piece
Windscreen 8 x 6 x 2 CurvedTrans-Bright GreenPart 41751Element 6031101×1
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.