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.
Axle Hose, Soft 11LYellowPart 32199Element 6533799 or 4215802×2
Axle Hose, Soft 19LYellowPart 32235Element 4588171 or 4142066×2
Technic Axle and Pin Connector Angled #5 - 112.5°YellowPart 32015Element 4521998 or 4107068×2
Technic Axle and Pin Connector PerpendicularYellowPart 6536Element 6261367 or 4173666×2
Technic Axle and Pin Connector Perpendicular Double SplitYellowPart 41678Element 4187125×8
Technic Beam 1 x 7 ThickYellowPart 32524Element 4495934 or 4187082×2
Technic Beam 1 x 9 ThickYellowPart 40490Element 6115616 or 4187136×1
Technic Panel Fairing # 7 Small Long, Large Hole, Side AYellowPart 32534Element 4158879×1
Technic Panel Fairing # 8 Small Long, Large Hole, Side BYellowPart 32535Element 4158888×1
Technic Panel Fairing #20 Large Long, Small Hole, Side AYellowPart 44350Element 4525048 or 4507356×1
Technic Panel Fairing #21 Large Long, Small Hole, Side BYellowPart 44351Element 4525046 or 4507357×1
Blue
8 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×8
Pearl Dark Gray
6 pieces
Technic Panel Fairing # 7 Small Long, Large Hole, Side APearl Dark GrayPart 32534Element 4163376×1
Technic Panel Fairing # 8 Small Long, Large Hole, Side BPearl Dark GrayPart 32535Element 4163377×1
Windscreen Bohrok 4 x 5 x 7 [Plain]Pearl Dark GrayPart 41671Element 4174707×4
Dark Red
2 pieces
Wheel 11 x 8 with Center GrooveDark RedPart 42610Element 4185944×2
Trans-Neon Green
2 pieces
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Trans-Neon GreenPart 41669Element 4163577×2
Trans-Red
2 pieces
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Trans-RedPart 41669Element 4163567×2
Pearl Light Gray
1 piece
Technic Engine Tunable, Block with Trapezoidal Air ScoopPearl Light GrayPart 46453Element 4494989 or 4297957×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 8376-1[No Color/Any Color]Part 48243Element 4216565×1
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.